Merge tag 'driver-core-3.17-rc1' of...

Merge tag 'driver-core-3.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core updates from Greg KH:
 "Here's the big driver-core pull request for 3.17-rc1.

  Largest thing in here is the dma-buf rework and fence code, that
  touched many different subsystems so it was agreed it should go
  through this tree to handle merge issues.  There's also some firmware
  loading updates, as well as tests added, and a few other tiny changes,
  the changelog has the details.

  All have been in linux-next for a long time"

* tag 'driver-core-3.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (32 commits)
  ARM: imx: Remove references to platform_bus in mxc code
  firmware loader: Fix _request_firmware_load() return val for fw load abort
  platform: Remove most references to platform_bus device
  test: add firmware_class loader test
  doc: fix minor typos in firmware_class README
  staging: android: Cleanup style issues
  Documentation: devres: Sort managed interfaces
  Documentation: devres: Add devm_kmalloc() et al
  fs: debugfs: remove trailing whitespace
  kernfs: kernel-doc warning fix
  debugfs: Fix corrupted loop in debugfs_remove_recursive
  stable_kernel_rules: Add pointer to netdev-FAQ for network patches
  driver core: platform: add device binding path 'driver_override'
  driver core/platform: remove unused implicit padding in platform_object
  firmware loader: inform direct failure when udev loader is disabled
  firmware: replace ALIGN(PAGE_SIZE) by PAGE_ALIGN
  firmware: read firmware size using i_size_read()
  firmware loader: allow disabling of udev as firmware loader
  reservation: add suppport for read-only access using rcu
  reservation: update api and add some helpers
  ...

Conflicts:
	drivers/base/platform.c

Documentation/ABI/testing/sysfs-bus-platform

+What:		/sys/bus/platform/devices/.../driver_override
+Date:		April 2014
+Contact:	Kim Phillips <kim.phillips@freescale.com>
+Description:
+		This file allows the driver for a device to be specified which
+		will override standard OF, ACPI, ID table, and name matching.
+		When specified, only a driver with a name matching the value
+		written to driver_override will have an opportunity to bind
+		to the device.  The override is specified by writing a string
+		to the driver_override file (echo vfio-platform > \
+		driver_override) and may be cleared with an empty string
+		(echo > driver_override).  This returns the device to standard
+		matching rules binding.  Writing to driver_override does not
+		automatically unbind the device from its current driver or make
+		any attempt to automatically load the specified driver.  If no
+		driver with a matching name is currently loaded in the kernel,
+		the device will not bind to any driver.  This also allows
+		devices to opt-out of driver binding using a driver_override
+		name such as "none".  Only a single driver may be specified in
+		the override, there is no support for parsing delimiters.

Documentation/DocBook/device-drivers.tmpl

@@ -128,8 +128,12 @@ X!Edrivers/base/interface.c
 !Edrivers/base/bus.c
      </sect1>
      <sect1><title>Device Drivers DMA Management</title>
-!Edrivers/base/dma-buf.c
-!Edrivers/base/reservation.c
+!Edrivers/dma-buf/dma-buf.c
+!Edrivers/dma-buf/fence.c
+!Edrivers/dma-buf/seqno-fence.c
+!Iinclude/linux/fence.h
+!Iinclude/linux/seqno-fence.h
+!Edrivers/dma-buf/reservation.c
 !Iinclude/linux/reservation.h
 !Edrivers/base/dma-coherent.c
 !Edrivers/base/dma-mapping.c

Documentation/driver-model/devres.txt

@@ -233,66 +233,78 @@ certainly invest a bit more effort into libata core layer).
   6. List of managed interfaces
   -----------------------------
 
-MEM
-  devm_kzalloc()
-  devm_kfree()
-  devm_kmemdup()
-  devm_get_free_pages()
-  devm_free_pages()
+CLOCK
+  devm_clk_get()
+  devm_clk_put()
+
+DMA
+  dmam_alloc_coherent()
+  dmam_alloc_noncoherent()
+  dmam_declare_coherent_memory()
+  dmam_free_coherent()
+  dmam_free_noncoherent()
+  dmam_pool_create()
+  dmam_pool_destroy()
+
+GPIO
+  devm_gpiod_get()
+  devm_gpiod_get_index()
+  devm_gpiod_get_index_optional()
+  devm_gpiod_get_optional()
+  devm_gpiod_put()
 
 IIO
   devm_iio_device_alloc()
   devm_iio_device_free()
-  devm_iio_trigger_alloc()
-  devm_iio_trigger_free()
   devm_iio_device_register()
   devm_iio_device_unregister()
+  devm_iio_trigger_alloc()
+  devm_iio_trigger_free()
 
 IO region
-  devm_request_region()
-  devm_request_mem_region()
-  devm_release_region()
   devm_release_mem_region()
-
-IRQ
-  devm_request_irq()
-  devm_free_irq()
-
-DMA
-  dmam_alloc_coherent()
-  dmam_free_coherent()
-  dmam_alloc_noncoherent()
-  dmam_free_noncoherent()
-  dmam_declare_coherent_memory()
-  dmam_pool_create()
-  dmam_pool_destroy()
-
-PCI
-  pcim_enable_device()	: after success, all PCI ops become managed
-  pcim_pin_device()	: keep PCI device enabled after release
+  devm_release_region()
+  devm_request_mem_region()
+  devm_request_region()
 
 IOMAP
   devm_ioport_map()
   devm_ioport_unmap()
   devm_ioremap()
   devm_ioremap_nocache()
-  devm_iounmap()
   devm_ioremap_resource() : checks resource, requests memory region, ioremaps
-  devm_request_and_ioremap() : obsoleted by devm_ioremap_resource()
+  devm_iounmap()
   pcim_iomap()
-  pcim_iounmap()
-  pcim_iomap_table()	: array of mapped addresses indexed by BAR
   pcim_iomap_regions()	: do request_region() and iomap() on multiple BARs
+  pcim_iomap_table()	: array of mapped addresses indexed by BAR
+  pcim_iounmap()
 
-REGULATOR
-  devm_regulator_get()
-  devm_regulator_put()
-  devm_regulator_bulk_get()
-  devm_regulator_register()
+IRQ
+  devm_free_irq()
+  devm_request_irq()
 
-CLOCK
-  devm_clk_get()
-  devm_clk_put()
+MDIO
+  devm_mdiobus_alloc()
+  devm_mdiobus_alloc_size()
+  devm_mdiobus_free()
+
+MEM
+  devm_free_pages()
+  devm_get_free_pages()
+  devm_kcalloc()
+  devm_kfree()
+  devm_kmalloc()
+  devm_kmalloc_array()
+  devm_kmemdup()
+  devm_kzalloc()
+
+PCI
+  pcim_enable_device()	: after success, all PCI ops become managed
+  pcim_pin_device()	: keep PCI device enabled after release
+
+PHY
+  devm_usb_get_phy()
+  devm_usb_put_phy()
 
 PINCTRL
   devm_pinctrl_get()
@@ -302,24 +314,14 @@ PWM
   devm_pwm_get()
   devm_pwm_put()
 
-PHY
-  devm_usb_get_phy()
-  devm_usb_put_phy()
+REGULATOR
+  devm_regulator_bulk_get()
+  devm_regulator_get()
+  devm_regulator_put()
+  devm_regulator_register()
 
 SLAVE DMA ENGINE
   devm_acpi_dma_controller_register()
 
 SPI
   devm_spi_register_master()
-
-GPIO
-  devm_gpiod_get()
-  devm_gpiod_get_index()
-  devm_gpiod_get_optional()
-  devm_gpiod_get_index_optional()
-  devm_gpiod_put()
-
-MDIO
-  devm_mdiobus_alloc()
-  devm_mdiobus_alloc_size()
-  devm_mdiobus_free()

Documentation/firmware_class/README

@@ -64,7 +64,7 @@
 
 	 if(request_firmware(&fw_entry, $FIRMWARE, device) == 0)
 	 	copy_fw_to_device(fw_entry->data, fw_entry->size);
-	 release(fw_entry);
+	 release_firmware(fw_entry);
 
  Sample/simple hotplug script:
  ============================
@@ -74,7 +74,7 @@
 	HOTPLUG_FW_DIR=/usr/lib/hotplug/firmware/
 
 	echo 1 > /sys/$DEVPATH/loading
-	cat $HOTPLUG_FW_DIR/$FIRMWARE > /sysfs/$DEVPATH/data
+	cat $HOTPLUG_FW_DIR/$FIRMWARE > /sys/$DEVPATH/data
 	echo 0 > /sys/$DEVPATH/loading
 
  Random notes:
@@ -123,6 +123,6 @@
  --------------------
  After firmware cache mechanism is introduced during system sleep,
  request_firmware can be called safely inside device's suspend and
- resume callback, and callers need't cache the firmware by
+ resume callback, and callers needn't cache the firmware by
  themselves any more for dealing with firmware loss during system
  resume.

Documentation/stable_kernel_rules.txt

@@ -29,6 +29,9 @@ Rules on what kind of patches are accepted, and which ones are not, into the
 
 Procedure for submitting patches to the -stable tree:
 
+ - If the patch covers files in net/ or drivers/net please follow netdev stable
+   submission guidelines as described in
+   Documentation/networking/netdev-FAQ.txt
  - Send the patch, after verifying that it follows the above rules, to
    stable@vger.kernel.org.  You must note the upstream commit ID in the
    changelog of your submission, as well as the kernel version you wish

MAINTAINERS

@@ -2915,8 +2915,8 @@ S:	Maintained
 L:	linux-media@vger.kernel.org
 L:	dri-devel@lists.freedesktop.org
 L:	linaro-mm-sig@lists.linaro.org
-F:	drivers/base/dma-buf*
-F:	include/linux/dma-buf*
+F:	drivers/dma-buf/
+F:	include/linux/dma-buf* include/linux/reservation.h include/linux/*fence.h
 F:	Documentation/dma-buf-sharing.txt
 T:	git git://git.linaro.org/people/sumitsemwal/linux-dma-buf.git
 

arch/arm/mach-bcm/board_bcm21664.c

@@ -60,8 +60,7 @@ static void bcm21664_restart(enum reboot_mode mode, const char *cmd)
 
 static void __init bcm21664_init(void)
 {
-	of_platform_populate(NULL, of_default_bus_match_table, NULL,
-		&platform_bus);
+	of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
 	kona_l2_cache_init();
 }
 

arch/arm/mach-bcm/board_bcm281xx.c

@@ -58,8 +58,7 @@ static void bcm281xx_restart(enum reboot_mode mode, const char *cmd)
 
 static void __init bcm281xx_init(void)
 {
-	of_platform_populate(NULL, of_default_bus_match_table, NULL,
-		&platform_bus);
+	of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
 	kona_l2_cache_init();
 }
 

arch/arm/mach-clps711x/board-edb7211.c

@@ -158,16 +158,16 @@ static void __init edb7211_init_late(void)
 	gpio_request_array(edb7211_gpios, ARRAY_SIZE(edb7211_gpios));
 
 	platform_device_register(&edb7211_flash_pdev);
-	platform_device_register_data(&platform_bus, "platform-lcd", 0,
+	platform_device_register_data(NULL, "platform-lcd", 0,
 				      &edb7211_lcd_power_pdata,
 				      sizeof(edb7211_lcd_power_pdata));
-	platform_device_register_data(&platform_bus, "generic-bl", 0,
+	platform_device_register_data(NULL, "generic-bl", 0,
 				      &edb7211_lcd_backlight_pdata,
 				      sizeof(edb7211_lcd_backlight_pdata));
 	platform_device_register_simple("video-clps711x", 0, NULL, 0);
 	platform_device_register_simple("cs89x0", 0, edb7211_cs8900_resource,
 					ARRAY_SIZE(edb7211_cs8900_resource));
-	platform_device_register_data(&platform_bus, "i2c-gpio", 0,
+	platform_device_register_data(NULL, "i2c-gpio", 0,
 				      &edb7211_i2c_pdata,
 				      sizeof(edb7211_i2c_pdata));
 }

arch/arm/mach-clps711x/board-p720t.c

@@ -348,14 +348,14 @@ static void __init p720t_init_late(void)
 {
 	WARN_ON(gpio_request_array(p720t_gpios, ARRAY_SIZE(p720t_gpios)));
 
-	platform_device_register_data(&platform_bus, "platform-lcd", 0,
+	platform_device_register_data(NULL, "platform-lcd", 0,
 				      &p720t_lcd_power_pdata,
 				      sizeof(p720t_lcd_power_pdata));
-	platform_device_register_data(&platform_bus, "generic-bl", 0,
+	platform_device_register_data(NULL, "generic-bl", 0,
 				      &p720t_lcd_backlight_pdata,
 				      sizeof(p720t_lcd_backlight_pdata));
 	platform_device_register_simple("video-clps711x", 0, NULL, 0);
-	platform_device_register_data(&platform_bus, "leds-gpio", 0,
+	platform_device_register_data(NULL, "leds-gpio", 0,
 				      &p720t_gpio_led_pdata,
 				      sizeof(p720t_gpio_led_pdata));
 }

arch/arm/mach-imx/devices/devices.c

@@ -24,12 +24,10 @@
 
 struct device mxc_aips_bus = {
 	.init_name	= "mxc_aips",
-	.parent		= &platform_bus,
 };
 
 struct device mxc_ahb_bus = {
 	.init_name	= "mxc_ahb",
-	.parent		= &platform_bus,
 };
 
 int __init mxc_device_init(void)

arch/arm/mach-imx/mach-mx27ads.c

@@ -245,7 +245,7 @@ static void __init mx27ads_regulator_init(void)
 	vchip->set		= vgpio_set;
 	gpiochip_add(vchip);
 
-	platform_device_register_data(&platform_bus, "reg-fixed-voltage",
+	platform_device_register_data(NULL, "reg-fixed-voltage",
 				      PLATFORM_DEVID_AUTO,
 				      &mx27ads_lcd_regulator_pdata,
 				      sizeof(mx27ads_lcd_regulator_pdata));

arch/arm/mach-shmobile/board-ape6evm.c

@@ -248,29 +248,29 @@ static void __init ape6evm_add_standard_devices(void)
 
 	regulator_register_fixed(0, dummy_supplies, ARRAY_SIZE(dummy_supplies));
 
-	platform_device_register_resndata(&platform_bus, "smsc911x", -1,
+	platform_device_register_resndata(NULL, "smsc911x", -1,
 					  lan9220_res, ARRAY_SIZE(lan9220_res),
 					  &lan9220_data, sizeof(lan9220_data));
 
 	regulator_register_always_on(1, "MMC0 Vcc", vcc_mmc0_consumers,
 				     ARRAY_SIZE(vcc_mmc0_consumers), 2800000);
-	platform_device_register_resndata(&platform_bus, "sh_mmcif", 0,
+	platform_device_register_resndata(NULL, "sh_mmcif", 0,
 					  mmcif0_resources, ARRAY_SIZE(mmcif0_resources),
 					  &mmcif0_pdata, sizeof(mmcif0_pdata));
-	platform_device_register_data(&platform_bus, "reg-fixed-voltage", 2,
+	platform_device_register_data(NULL, "reg-fixed-voltage", 2,
 				      &vcc_sdhi0_info, sizeof(vcc_sdhi0_info));
-	platform_device_register_resndata(&platform_bus, "sh_mobile_sdhi", 0,
+	platform_device_register_resndata(NULL, "sh_mobile_sdhi", 0,
 					  sdhi0_resources, ARRAY_SIZE(sdhi0_resources),
 					  &sdhi0_pdata, sizeof(sdhi0_pdata));
 	regulator_register_always_on(3, "SDHI1 Vcc", vcc_sdhi1_consumers,
 				     ARRAY_SIZE(vcc_sdhi1_consumers), 3300000);
-	platform_device_register_resndata(&platform_bus, "sh_mobile_sdhi", 1,
+	platform_device_register_resndata(NULL, "sh_mobile_sdhi", 1,
 					  sdhi1_resources, ARRAY_SIZE(sdhi1_resources),
 					  &sdhi1_pdata, sizeof(sdhi1_pdata));
-	platform_device_register_data(&platform_bus, "gpio-keys", -1,
+	platform_device_register_data(NULL, "gpio-keys", -1,
 				      &ape6evm_keys_pdata,
 				      sizeof(ape6evm_keys_pdata));
-	platform_device_register_data(&platform_bus, "leds-gpio", -1,
+	platform_device_register_data(NULL, "leds-gpio", -1,
 				      &ape6evm_leds_pdata,
 				      sizeof(ape6evm_leds_pdata));
 }

arch/arm/mach-shmobile/board-bockw.c

@@ -177,7 +177,7 @@ static struct renesas_usbhs_platform_info usbhs_info __initdata = {
 #define USB1_DEVICE	"renesas_usbhs"
 #define ADD_USB_FUNC_DEVICE_IF_POSSIBLE()			\
 	platform_device_register_resndata(			\
-		&platform_bus, "renesas_usbhs", -1,		\
+		NULL, "renesas_usbhs", -1,			\
 		usbhsf_resources,				\
 		ARRAY_SIZE(usbhsf_resources),			\
 		&usbhs_info, sizeof(struct renesas_usbhs_platform_info))
@@ -236,7 +236,6 @@ static struct sh_eth_plat_data ether_platform_data __initdata = {
 };
 
 static struct platform_device_info ether_info __initdata = {
-	.parent		= &platform_bus,
 	.name		= "r8a777x-ether",
 	.id		= -1,
 	.res		= ether_resources,
@@ -322,7 +321,6 @@ static struct resource vin##idx##_resources[] __initdata = {		\
 };									\
 									\
 static struct platform_device_info vin##idx##_info __initdata = {	\
-	.parent		= &platform_bus,				\
 	.name		= "r8a7778-vin",				\
 	.id		= idx,						\
 	.res		= vin##idx##_resources,				\
@@ -621,10 +619,10 @@ static void __init bockw_init(void)
 	/* VIN1 has a pin conflict with Ether */
 	if (!IS_ENABLED(CONFIG_SH_ETH))
 		platform_device_register_full(&vin1_info);
-	platform_device_register_data(&platform_bus, "soc-camera-pdrv", 0,
+	platform_device_register_data(NULL, "soc-camera-pdrv", 0,
 				      &iclink0_ml86v7667,
 				      sizeof(iclink0_ml86v7667));
-	platform_device_register_data(&platform_bus, "soc-camera-pdrv", 1,
+	platform_device_register_data(NULL, "soc-camera-pdrv", 1,
 				      &iclink1_ml86v7667,
 				      sizeof(iclink1_ml86v7667));
 
@@ -637,12 +635,12 @@ static void __init bockw_init(void)
 	r8a7778_pinmux_init();
 
 	platform_device_register_resndata(
-		&platform_bus, "sh_mmcif", -1,
+		NULL, "sh_mmcif", -1,
 		mmc_resources, ARRAY_SIZE(mmc_resources),
 		&sh_mmcif_plat, sizeof(struct sh_mmcif_plat_data));
 
 	platform_device_register_resndata(
-		&platform_bus, "rcar_usb_phy", -1,
+		NULL, "rcar_usb_phy", -1,
 		usb_phy_resources,
 		ARRAY_SIZE(usb_phy_resources),
 		&usb_phy_platform_data,
@@ -668,7 +666,7 @@ static void __init bockw_init(void)
 		iowrite16(val, fpga + IRQ0MR);
 
 		platform_device_register_resndata(
-			&platform_bus, "smsc911x", -1,
+			NULL, "smsc911x", -1,
 			smsc911x_resources, ARRAY_SIZE(smsc911x_resources),
 			&smsc911x_data, sizeof(smsc911x_data));
 	}
@@ -685,7 +683,7 @@ static void __init bockw_init(void)
 		iounmap(base);
 
 		platform_device_register_resndata(
-			&platform_bus, "sh_mobile_sdhi", 0,
+			NULL, "sh_mobile_sdhi", 0,
 			sdhi0_resources, ARRAY_SIZE(sdhi0_resources),
 			&sdhi0_info, sizeof(struct sh_mobile_sdhi_info));
 	}
@@ -700,7 +698,7 @@ static void __init bockw_init(void)
 		"ak4554-adc-dac", 1, NULL, 0);
 
 	pdev = platform_device_register_resndata(
-		&platform_bus, "rcar_sound", -1,
+		NULL, "rcar_sound", -1,
 		rsnd_resources, ARRAY_SIZE(rsnd_resources),
 		&rsnd_info, sizeof(rsnd_info));
 
@@ -710,7 +708,6 @@ static void __init bockw_init(void)
 
 	for (i = 0; i < ARRAY_SIZE(rsnd_card_info); i++) {
 		struct platform_device_info cardinfo = {
-			.parent         = &platform_bus,
 			.name           = "asoc-simple-card",
 			.id             = i,
 			.data           = &rsnd_card_info[i],

arch/arm/mach-shmobile/board-genmai.c

@@ -46,7 +46,6 @@ static const struct resource ether_resources[] __initconst = {
 };
 
 static const struct platform_device_info ether_info __initconst = {
-	.parent		= &platform_bus,
 	.name		= "r7s72100-ether",
 	.id		= -1,
 	.res		= ether_resources,
@@ -76,7 +75,7 @@ static const struct rspi_plat_data rspi_pdata __initconst = {
 };
 
 #define r7s72100_register_rspi(idx)					   \
-	platform_device_register_resndata(&platform_bus, "rspi-rz", idx,   \
+	platform_device_register_resndata(NULL, "rspi-rz", idx,            \
 					rspi##idx##_resources,		   \
 					ARRAY_SIZE(rspi##idx##_resources), \
 					&rspi_pdata, sizeof(rspi_pdata))
@@ -118,7 +117,7 @@ R7S72100_SCIF(6, 0xe800a000, gic_iid(245));
 R7S72100_SCIF(7, 0xe800a800, gic_iid(249));
 
 #define r7s72100_register_scif(index)					       \
-	platform_device_register_resndata(&platform_bus, "sh-sci", index,      \
+	platform_device_register_resndata(NULL, "sh-sci", index,               \
 					  scif##index##_resources,	       \
 					  ARRAY_SIZE(scif##index##_resources), \
 					  &scif##index##_platform_data,	       \

arch/arm/mach-shmobile/board-koelsch.c

@@ -118,7 +118,6 @@ static const struct resource ether_resources[] __initconst = {
 };
 
 static const struct platform_device_info ether_info __initconst = {
-	.parent		= &platform_bus,
 	.name		= "r8a7791-ether",
 	.id		= -1,
 	.res		= ether_resources,
@@ -230,7 +229,6 @@ static const struct resource sata0_resources[] __initconst = {
 };
 
 static const struct platform_device_info sata0_info __initconst = {
-	.parent		= &platform_bus,
 	.name		= "sata-r8a7791",
 	.id		= 0,
 	.res		= sata0_resources,
@@ -439,13 +437,13 @@ static void __init koelsch_add_standard_devices(void)
 	r8a7791_pinmux_init();
 	r8a7791_add_standard_devices();
 	platform_device_register_full(&ether_info);
-	platform_device_register_data(&platform_bus, "leds-gpio", -1,
+	platform_device_register_data(NULL, "leds-gpio", -1,
 				      &koelsch_leds_pdata,
 				      sizeof(koelsch_leds_pdata));
-	platform_device_register_data(&platform_bus, "gpio-keys", -1,
+	platform_device_register_data(NULL, "gpio-keys", -1,
 				      &koelsch_keys_pdata,
 				      sizeof(koelsch_keys_pdata));
-	platform_device_register_resndata(&platform_bus, "qspi", 0,
+	platform_device_register_resndata(NULL, "qspi", 0,
 					  qspi_resources,
 					  ARRAY_SIZE(qspi_resources),
 					  &qspi_pdata, sizeof(qspi_pdata));
@@ -460,28 +458,28 @@ static void __init koelsch_add_standard_devices(void)
 	koelsch_add_i2c(4);
 	koelsch_add_i2c(5);
 
-	platform_device_register_data(&platform_bus, "reg-fixed-voltage", 0,
+	platform_device_register_data(NULL, "reg-fixed-voltage", 0,
 				      &vcc_sdhi0_info, sizeof(struct fixed_voltage_config));
-	platform_device_register_data(&platform_bus, "reg-fixed-voltage", 1,
+	platform_device_register_data(NULL, "reg-fixed-voltage", 1,
 				      &vcc_sdhi1_info, sizeof(struct fixed_voltage_config));
-	platform_device_register_data(&platform_bus, "reg-fixed-voltage", 2,
+	platform_device_register_data(NULL, "reg-fixed-voltage", 2,
 				      &vcc_sdhi2_info, sizeof(struct fixed_voltage_config));
-	platform_device_register_data(&platform_bus, "gpio-regulator", 0,
+	platform_device_register_data(NULL, "gpio-regulator", 0,
 				      &vccq_sdhi0_info, sizeof(struct gpio_regulator_config));
-	platform_device_register_data(&platform_bus, "gpio-regulator", 1,
+	platform_device_register_data(NULL, "gpio-regulator", 1,
 				      &vccq_sdhi1_info, sizeof(struct gpio_regulator_config));
-	platform_device_register_data(&platform_bus, "gpio-regulator", 2,
+	platform_device_register_data(NULL, "gpio-regulator", 2,
 				      &vccq_sdhi2_info, sizeof(struct gpio_regulator_config));
 
-	platform_device_register_resndata(&platform_bus, "sh_mobile_sdhi", 0,
+	platform_device_register_resndata(NULL, "sh_mobile_sdhi", 0,
 					  sdhi0_resources, ARRAY_SIZE(sdhi0_resources),
 					  &sdhi0_info, sizeof(struct sh_mobile_sdhi_info));
 
-	platform_device_register_resndata(&platform_bus, "sh_mobile_sdhi", 1,
+	platform_device_register_resndata(NULL, "sh_mobile_sdhi", 1,
 					  sdhi1_resources, ARRAY_SIZE(sdhi1_resources),
 					  &sdhi1_info, sizeof(struct sh_mobile_sdhi_info));
 
-	platform_device_register_resndata(&platform_bus, "sh_mobile_sdhi", 2,
+	platform_device_register_resndata(NULL, "sh_mobile_sdhi", 2,
 					  sdhi2_resources, ARRAY_SIZE(sdhi2_resources),
 					  &sdhi2_info, sizeof(struct sh_mobile_sdhi_info));
 

arch/arm/mach-shmobile/board-lager.c

@@ -277,7 +277,6 @@ static const struct resource ether_resources[] __initconst = {
 };
 
 static const struct platform_device_info ether_info __initconst = {
-	.parent		= &platform_bus,
 	.name		= "r8a7790-ether",
 	.id		= -1,
 	.res		= ether_resources,
@@ -354,7 +353,6 @@ static void __init lager_add_vin_device(unsigned idx,
 					struct rcar_vin_platform_data *pdata)
 {
 	struct platform_device_info vin_info = {
-		.parent		= &platform_bus,
 		.name		= "r8a7790-vin",
 		.id		= idx,
 		.res		= &vin_resources[idx * 2],
@@ -391,7 +389,7 @@ LAGER_CAMERA(1, "adv7180", 0x20, NULL, RCAR_VIN_BT656);
 
 static void __init lager_add_camera1_device(void)
 {
-	platform_device_register_data(&platform_bus, "soc-camera-pdrv", 1,
+	platform_device_register_data(NULL, "soc-camera-pdrv", 1,
 				      &cam1_link, sizeof(cam1_link));
 	lager_add_vin_device(1, &vin1_pdata);
 }
@@ -403,7 +401,6 @@ static const struct resource sata1_resources[] __initconst = {
 };
 
 static const struct platform_device_info sata1_info __initconst = {
-	.parent		= &platform_bus,
 	.name		= "sata-r8a7790",
 	.id		= 1,
 	.res		= sata1_resources,
@@ -533,7 +530,7 @@ static struct usbhs_private usbhs_priv __initdata = {
 static void __init lager_register_usbhs(void)
 {
 	usb_bind_phy("renesas_usbhs", 0, "usb_phy_rcar_gen2");
-	platform_device_register_resndata(&platform_bus,
+	platform_device_register_resndata(NULL,
 					  "renesas_usbhs", -1,
 					  usbhs_resources,
 					  ARRAY_SIZE(usbhs_resources),
@@ -608,7 +605,6 @@ static struct asoc_simple_card_info rsnd_card_info = {
 static void __init lager_add_rsnd_device(void)
 {
 	struct platform_device_info cardinfo = {
-		.parent         = &platform_bus,
 		.name           = "asoc-simple-card",
 		.id             = -1,
 		.data           = &rsnd_card_info,
@@ -620,7 +616,7 @@ static void __init lager_add_rsnd_device(void)
 				ARRAY_SIZE(i2c2_devices));
 
 	platform_device_register_resndata(
-		&platform_bus, "rcar_sound", -1,
+		NULL, "rcar_sound", -1,
 		rsnd_resources, ARRAY_SIZE(rsnd_resources),
 		&rsnd_info, sizeof(rsnd_info));
 
@@ -663,7 +659,6 @@ static const struct resource pci1_resources[] __initconst = {
 };
 
 static const struct platform_device_info pci1_info __initconst = {
-	.parent		= &platform_bus,
 	.name		= "pci-rcar-gen2",
 	.id		= 1,
 	.res		= pci1_resources,
@@ -684,7 +679,6 @@ static const struct resource pci2_resources[] __initconst = {
 };
 
 static const struct platform_device_info pci2_info __initconst = {
-	.parent		= &platform_bus,
 	.name		= "pci-rcar-gen2",
 	.id		= 2,
 	.res		= pci2_resources,
@@ -795,16 +789,16 @@ static void __init lager_add_standard_devices(void)
 	r8a7790_pinmux_init();
 
 	r8a7790_add_standard_devices();
-	platform_device_register_data(&platform_bus, "leds-gpio", -1,
+	platform_device_register_data(NULL, "leds-gpio", -1,
 				      &lager_leds_pdata,
 				      sizeof(lager_leds_pdata));
-	platform_device_register_data(&platform_bus, "gpio-keys", -1,
+	platform_device_register_data(NULL, "gpio-keys", -1,
 				      &lager_keys_pdata,
 				      sizeof(lager_keys_pdata));
 	regulator_register_always_on(fixed_regulator_idx++,
 				     "fixed-3.3V", fixed3v3_power_consumers,
 				     ARRAY_SIZE(fixed3v3_power_consumers), 3300000);
-	platform_device_register_resndata(&platform_bus, "sh_mmcif", 1,
+	platform_device_register_resndata(NULL, "sh_mmcif", 1,
 					  mmcif1_resources, ARRAY_SIZE(mmcif1_resources),
 					  &mmcif1_pdata, sizeof(mmcif1_pdata));
 
@@ -812,27 +806,27 @@ static void __init lager_add_standard_devices(void)
 
 	lager_add_du_device();
 
-	platform_device_register_resndata(&platform_bus, "qspi", 0,
+	platform_device_register_resndata(NULL, "qspi", 0,
 					  qspi_resources,
 					  ARRAY_SIZE(qspi_resources),
 					  &qspi_pdata, sizeof(qspi_pdata));
 	spi_register_board_info(spi_info, ARRAY_SIZE(spi_info));
 
-	platform_device_register_data(&platform_bus, "reg-fixed-voltage", fixed_regulator_idx++,
+	platform_device_register_data(NULL, "reg-fixed-voltage", fixed_regulator_idx++,
 				      &vcc_sdhi0_info, sizeof(struct fixed_voltage_config));
-	platform_device_register_data(&platform_bus, "reg-fixed-voltage", fixed_regulator_idx++,
+	platform_device_register_data(NULL, "reg-fixed-voltage", fixed_regulator_idx++,
 				      &vcc_sdhi2_info, sizeof(struct fixed_voltage_config));
 
-	platform_device_register_data(&platform_bus, "gpio-regulator", gpio_regulator_idx++,
+	platform_device_register_data(NULL, "gpio-regulator", gpio_regulator_idx++,
 				      &vccq_sdhi0_info, sizeof(struct gpio_regulator_config));
-	platform_device_register_data(&platform_bus, "gpio-regulator", gpio_regulator_idx++,
+	platform_device_register_data(NULL, "gpio-regulator", gpio_regulator_idx++,
 				      &vccq_sdhi2_info, sizeof(struct gpio_regulator_config));
 
 	lager_add_camera1_device();
 
 	platform_device_register_full(&sata1_info);
 
-	platform_device_register_resndata(&platform_bus, "usb_phy_rcar_gen2",
+	platform_device_register_resndata(NULL, "usb_phy_rcar_gen2",
 					  -1, usbhs_phy_resources,
 					  ARRAY_SIZE(usbhs_phy_resources),
 					  &usbhs_phy_pdata,
@@ -843,10 +837,10 @@ static void __init lager_add_standard_devices(void)
 
 	lager_add_rsnd_device();
 
-	platform_device_register_resndata(&platform_bus, "sh_mobile_sdhi", 0,
+	platform_device_register_resndata(NULL, "sh_mobile_sdhi", 0,
 					  sdhi0_resources, ARRAY_SIZE(sdhi0_resources),
 					  &sdhi0_info, sizeof(struct sh_mobile_sdhi_info));
-	platform_device_register_resndata(&platform_bus, "sh_mobile_sdhi", 2,
+	platform_device_register_resndata(NULL, "sh_mobile_sdhi", 2,
 					  sdhi2_resources, ARRAY_SIZE(sdhi2_resources),
 					  &sdhi2_info, sizeof(struct sh_mobile_sdhi_info));
 }

arch/arm/mach-shmobile/board-marzen.c

@@ -272,7 +272,6 @@ static struct resource vin##idx##_resources[] __initdata = {	\
 };								\
 								\
 static struct platform_device_info vin##idx##_info __initdata = { \
-	.parent		= &platform_bus,			\
 	.name		= "r8a7779-vin",			\
 	.id		= idx,					\
 	.res		= vin##idx##_resources,			\

arch/arm/mach-shmobile/setup-r7s72100.c

@@ -33,7 +33,7 @@ static struct resource mtu2_resources[] __initdata = {
 };
 
 #define r7s72100_register_mtu2()					\
-	platform_device_register_resndata(&platform_bus, "sh-mtu2",	\
+	platform_device_register_resndata(NULL, "sh-mtu2",		\
 					  -1, mtu2_resources,		\
 					  ARRAY_SIZE(mtu2_resources),	\
 					  NULL, 0)

arch/arm/mach-shmobile/setup-r8a73a4.c

@@ -68,7 +68,7 @@ R8A73A4_SCIFB(4, 0xe6ce0000, gic_spi(150)); /* SCIFB2 */
 R8A73A4_SCIFB(5, 0xe6cf0000, gic_spi(151)); /* SCIFB3 */
 
 #define r8a73a4_register_scif(index)					       \
-	platform_device_register_resndata(&platform_bus, "sh-sci", index,      \
+	platform_device_register_resndata(NULL, "sh-sci", index,	       \
 					  scif##index##_resources,	       \
 					  ARRAY_SIZE(scif##index##_resources), \
 					  &scif##index##_platform_data,	       \
@@ -149,7 +149,7 @@ static const struct resource irqc1_resources[] = {
 };
 
 #define r8a73a4_register_irqc(idx)					\
-	platform_device_register_resndata(&platform_bus, "renesas_irqc", \
+	platform_device_register_resndata(NULL, "renesas_irqc", 	\
 					  idx, irqc##idx##_resources,	\
 					  ARRAY_SIZE(irqc##idx##_resources), \
 					  &irqc##idx##_data,		\
@@ -179,7 +179,7 @@ static struct resource cmt1_resources[] = {
 };
 
 #define r8a7790_register_cmt(idx)					\
-	platform_device_register_resndata(&platform_bus, "sh-cmt-48-gen2", \
+	platform_device_register_resndata(NULL, "sh-cmt-48-gen2",	\
 					  idx, cmt##idx##_resources,	\
 					  ARRAY_SIZE(cmt##idx##_resources), \
 					  &cmt##idx##_platform_data,	\
@@ -280,7 +280,7 @@ static struct resource dma_resources[] = {
 };
 
 #define r8a73a4_register_dmac()							\
-	platform_device_register_resndata(&platform_bus, "sh-dma-engine", 0,	\
+	platform_device_register_resndata(NULL, "sh-dma-engine", 0,		\
 				dma_resources, ARRAY_SIZE(dma_resources),	\
 				&dma_pdata, sizeof(dma_pdata))
 

arch/arm/mach-shmobile/setup-r8a7778.c

@@ -64,7 +64,7 @@ R8A7778_SCIF(4, 0xffe44000, gic_iid(0x6a));
 R8A7778_SCIF(5, 0xffe45000, gic_iid(0x6b));
 
 #define r8a7778_register_scif(index)					       \
-	platform_device_register_resndata(&platform_bus, "sh-sci", index,      \
+	platform_device_register_resndata(NULL, "sh-sci", index,	       \
 					  scif##index##_resources,	       \
 					  ARRAY_SIZE(scif##index##_resources), \
 					  &scif##index##_platform_data,	       \
@@ -84,7 +84,7 @@ static struct resource sh_tmu0_resources[] = {
 
 #define r8a7778_register_tmu(idx)			\
 	platform_device_register_resndata(		\
-		&platform_bus, "sh-tmu", idx,		\
+		NULL, "sh-tmu", idx,			\
 		sh_tmu##idx##_resources,		\
 		ARRAY_SIZE(sh_tmu##idx##_resources),	\
 		&sh_tmu##idx##_platform_data,		\
@@ -173,7 +173,6 @@ static struct resource ohci_resources[] __initdata = {
 
 #define USB_PLATFORM_INFO(hci)					\
 static struct platform_device_info hci##_info __initdata = {	\
-	.parent		= &platform_bus,			\
 	.name		= #hci "-platform",			\
 	.id		= -1,					\
 	.res		= hci##_resources,			\
@@ -212,7 +211,7 @@ R8A7778_GPIO(4);
 
 #define r8a7778_register_gpio(idx)				\
 	platform_device_register_resndata(			\
-		&platform_bus, "gpio_rcar", idx,		\
+		NULL, "gpio_rcar", idx,				\
 		r8a7778_gpio##idx##_resources,			\
 		ARRAY_SIZE(r8a7778_gpio##idx##_resources),	\
 		&r8a7778_gpio##idx##_platform_data,		\
@@ -496,8 +495,8 @@ static struct resource hpb_dmae_resources[] __initdata = {
 
 static void __init r8a7778_register_hpb_dmae(void)
 {
-	platform_device_register_resndata(&platform_bus, "hpb-dma-engine", -1,
-					  hpb_dmae_resources,
+	platform_device_register_resndata(NULL, "hpb-dma-engine",
+					  -1, hpb_dmae_resources,
 					  ARRAY_SIZE(hpb_dmae_resources),
 					  &dma_platform_data,
 					  sizeof(dma_platform_data));
@@ -565,7 +564,7 @@ void __init r8a7778_init_irq_extpin(int irlm)
 	r8a7778_init_irq_extpin_dt(irlm);
 	if (irlm)
 		platform_device_register_resndata(
-			&platform_bus, "renesas_intc_irqpin", -1,
+			NULL, "renesas_intc_irqpin", -1,
 			irqpin_resources, ARRAY_SIZE(irqpin_resources),
 			&irqpin_platform_data, sizeof(irqpin_platform_data));
 }

arch/arm/mach-shmobile/setup-r8a7779.c

@@ -123,7 +123,7 @@ void __init r8a7779_init_irq_extpin(int irlm)
 	r8a7779_init_irq_extpin_dt(irlm);
 	if (irlm)
 		platform_device_register_resndata(
-			&platform_bus, "renesas_intc_irqpin", -1,
+			NULL, "renesas_intc_irqpin", -1,
 			irqpin0_resources, ARRAY_SIZE(irqpin0_resources),
 			&irqpin0_platform_data, sizeof(irqpin0_platform_data));
 }
@@ -632,8 +632,8 @@ static struct resource hpb_dmae_resources[] __initdata = {
 
 static void __init r8a7779_register_hpb_dmae(void)
 {
-	platform_device_register_resndata(&platform_bus, "hpb-dma-engine", -1,
-					  hpb_dmae_resources,
+	platform_device_register_resndata(NULL, "hpb-dma-engine",
+					  -1, hpb_dmae_resources,
 					  ARRAY_SIZE(hpb_dmae_resources),
 					  &dma_platform_data,
 					  sizeof(dma_platform_data));

arch/arm/mach-shmobile/setup-r8a7790.c

@@ -113,7 +113,7 @@ static struct resource r8a7790_audio_dmac_resources[] = {
 
 #define r8a7790_register_audio_dmac(id)				\
 	platform_device_register_resndata(			\
-		&platform_bus, "sh-dma-engine", id,		\
+		NULL, "sh-dma-engine", id,			\
 		&r8a7790_audio_dmac_resources[id * 3],	3,	\
 		&r8a7790_audio_dmac_platform_data,		\
 		sizeof(r8a7790_audio_dmac_platform_data))
@@ -149,7 +149,7 @@ R8A7790_GPIO(4);
 R8A7790_GPIO(5);
 
 #define r8a7790_register_gpio(idx)					\
-	platform_device_register_resndata(&platform_bus, "gpio_rcar", idx, \
+	platform_device_register_resndata(NULL, "gpio_rcar", idx,	\
 		r8a7790_gpio##idx##_resources,				\
 		ARRAY_SIZE(r8a7790_gpio##idx##_resources),		\
 		&r8a7790_gpio##idx##_platform_data,			\
@@ -227,7 +227,7 @@ R8A7790_HSCIF(8, 0xe62c0000, gic_spi(154)); /* HSCIF0 */
 R8A7790_HSCIF(9, 0xe62c8000, gic_spi(155)); /* HSCIF1 */
 
 #define r8a7790_register_scif(index)					       \
-	platform_device_register_resndata(&platform_bus, "sh-sci", index,      \
+	platform_device_register_resndata(NULL, "sh-sci", index,  	       \
 					  scif##index##_resources,	       \
 					  ARRAY_SIZE(scif##index##_resources), \
 					  &scif##index##_platform_data,	       \
@@ -246,7 +246,7 @@ static const struct resource irqc0_resources[] __initconst = {
 };
 
 #define r8a7790_register_irqc(idx)					\
-	platform_device_register_resndata(&platform_bus, "renesas_irqc", \
+	platform_device_register_resndata(NULL, "renesas_irqc",		\
 					  idx, irqc##idx##_resources,	\
 					  ARRAY_SIZE(irqc##idx##_resources), \
 					  &irqc##idx##_data,		\
@@ -273,7 +273,7 @@ static struct resource cmt0_resources[] = {
 };
 
 #define r8a7790_register_cmt(idx)					\
-	platform_device_register_resndata(&platform_bus, "sh-cmt-48-gen2", \
+	platform_device_register_resndata(NULL, "sh-cmt-48-gen2",	\
 					  idx, cmt##idx##_resources,	\
 					  ARRAY_SIZE(cmt##idx##_resources), \
 					  &cmt##idx##_platform_data,	\

arch/arm/mach-shmobile/setup-r8a7791.c

@@ -65,7 +65,7 @@ R8A7791_GPIO(6, 0xe6055400, 32);
 R8A7791_GPIO(7, 0xe6055800, 26);
 
 #define r8a7791_register_gpio(idx)					\
-	platform_device_register_resndata(&platform_bus, "gpio_rcar", idx, \
+	platform_device_register_resndata(NULL, "gpio_rcar", idx,	\
 		r8a7791_gpio##idx##_resources,				\
 		ARRAY_SIZE(r8a7791_gpio##idx##_resources),		\
 		&r8a7791_gpio##idx##_platform_data,			\
@@ -122,7 +122,7 @@ R8A7791_SCIFA(13, 0xe6c78000, gic_spi(30)); /* SCIFA4 */
 R8A7791_SCIFA(14, 0xe6c80000, gic_spi(31)); /* SCIFA5 */
 
 #define r8a7791_register_scif(index)					       \
-	platform_device_register_resndata(&platform_bus, "sh-sci", index,      \
+	platform_device_register_resndata(NULL, "sh-sci", index,  	       \
 					  scif##index##_resources,	       \
 					  ARRAY_SIZE(scif##index##_resources), \
 					  &scif##index##_platform_data,	       \
@@ -138,7 +138,7 @@ static struct resource cmt0_resources[] = {
 };
 
 #define r8a7791_register_cmt(idx)					\
-	platform_device_register_resndata(&platform_bus, "sh-cmt-48-gen2", \
+	platform_device_register_resndata(NULL, "sh-cmt-48-gen2",	\
 					  idx, cmt##idx##_resources,	\
 					  ARRAY_SIZE(cmt##idx##_resources), \
 					  &cmt##idx##_platform_data,	\
@@ -163,7 +163,7 @@ static struct resource irqc0_resources[] = {
 };
 
 #define r8a7791_register_irqc(idx)					\
-	platform_device_register_resndata(&platform_bus, "renesas_irqc", \
+	platform_device_register_resndata(NULL, "renesas_irqc",		\
 					  idx, irqc##idx##_resources,	\
 					  ARRAY_SIZE(irqc##idx##_resources), \
 					  &irqc##idx##_data,		\

arch/unicore32/kernel/puv3-core.c

@@ -272,7 +272,7 @@ void __init puv3_core_init(void)
 	platform_device_register_simple("PKUnity-v3-UART", 1,
 			puv3_uart1_resources, ARRAY_SIZE(puv3_uart1_resources));
 	platform_device_register_simple("PKUnity-v3-AC97", -1, NULL, 0);
-	platform_device_register_resndata(&platform_bus, "musb_hdrc", -1,
+	platform_device_register_resndata(NULL, "musb_hdrc", -1,
 			puv3_usb_resources, ARRAY_SIZE(puv3_usb_resources),
 			&puv3_usb_plat, sizeof(puv3_usb_plat));
 }

arch/unicore32/kernel/puv3-nb0916.c

@@ -112,13 +112,13 @@ int __init mach_nb0916_init(void)
 	platform_device_register_simple("PKUnity-v3-I2C", -1,
 			puv3_i2c_resources, ARRAY_SIZE(puv3_i2c_resources));
 
-	platform_device_register_data(&platform_bus, "pwm-backlight", -1,
+	platform_device_register_data(NULL, "pwm-backlight", -1,
 			&nb0916_backlight_data, sizeof(nb0916_backlight_data));
 
-	platform_device_register_data(&platform_bus, "gpio-keys", -1,
+	platform_device_register_data(NULL, "gpio-keys", -1,
 			&nb0916_gpio_button_data, sizeof(nb0916_gpio_button_data));
 
-	platform_device_register_resndata(&platform_bus, "physmap-flash", -1,
+	platform_device_register_resndata(NULL, "physmap-flash", -1,
 			&physmap_flash_resource, 1,
 			&physmap_flash_data, sizeof(physmap_flash_data));
 

drivers/Makefile

@@ -61,6 +61,7 @@ obj-$(CONFIG_FB_INTEL)          += video/fbdev/intelfb/
 
 obj-$(CONFIG_PARPORT)		+= parport/
 obj-y				+= base/ block/ misc/ mfd/ nfc/
+obj-$(CONFIG_DMA_SHARED_BUFFER) += dma-buf/
 obj-$(CONFIG_NUBUS)		+= nubus/
 obj-y				+= macintosh/
 obj-$(CONFIG_IDE)		+= ide/

drivers/base/Kconfig

@@ -149,15 +149,21 @@ config EXTRA_FIRMWARE_DIR
 	  some other directory containing the firmware files.
 
 config FW_LOADER_USER_HELPER
+	bool
+
+config FW_LOADER_USER_HELPER_FALLBACK
 	bool "Fallback user-helper invocation for firmware loading"
 	depends on FW_LOADER
-	default y
+	select FW_LOADER_USER_HELPER
 	help
 	  This option enables / disables the invocation of user-helper
 	  (e.g. udev) for loading firmware files as a fallback after the
 	  direct file loading in kernel fails.  The user-mode helper is
 	  no longer required unless you have a special firmware file that
-	  resides in a non-standard path.
+	  resides in a non-standard path. Moreover, the udev support has
+	  been deprecated upstream.
+
+	  If you are unsure about this, say N here.
 
 config DEBUG_DRIVER
 	bool "Driver Core verbose debug messages"
@@ -208,6 +214,15 @@ config DMA_SHARED_BUFFER
 	  APIs extension; the file's descriptor can then be passed on to other
 	  driver.
 
+config FENCE_TRACE
+	bool "Enable verbose FENCE_TRACE messages"
+	depends on DMA_SHARED_BUFFER
+	help
+	  Enable the FENCE_TRACE printks. This will add extra
+	  spam to the console log, but will make it easier to diagnose
+	  lockup related problems for dma-buffers shared across multiple
+	  devices.
+
 config DMA_CMA
 	bool "DMA Contiguous Memory Allocator"
 	depends on HAVE_DMA_CONTIGUOUS && CMA

drivers/base/Makefile

@@ -10,7 +10,6 @@ obj-$(CONFIG_DMA_CMA) += dma-contiguous.o
 obj-y			+= power/
 obj-$(CONFIG_HAS_DMA)	+= dma-mapping.o
 obj-$(CONFIG_HAVE_GENERIC_DMA_COHERENT) += dma-coherent.o
-obj-$(CONFIG_DMA_SHARED_BUFFER) += dma-buf.o reservation.o
 obj-$(CONFIG_ISA)	+= isa.o
 obj-$(CONFIG_FW_LOADER)	+= firmware_class.o
 obj-$(CONFIG_NUMA)	+= node.o

drivers/base/component.c

@@ -18,6 +18,15 @@
 #include <linux/mutex.h>
 #include <linux/slab.h>
 
+struct component_match {
+	size_t alloc;
+	size_t num;
+	struct {
+		void *data;
+		int (*fn)(struct device *, void *);
+	} compare[0];
+};
+
 struct master {
 	struct list_head node;
 	struct list_head components;
@@ -25,6 +34,7 @@ struct master {
 
 	const struct component_master_ops *ops;
 	struct device *dev;
+	struct component_match *match;
 };
 
 struct component {
@@ -69,6 +79,11 @@ static void component_detach_master(struct master *master, struct component *c)
 	c->master = NULL;
 }
 
+/*
+ * Add a component to a master, finding the component via the compare
+ * function and compare data.  This is safe to call for duplicate matches
+ * and will not result in the same component being added multiple times.
+ */
 int component_master_add_child(struct master *master,
 	int (*compare)(struct device *, void *), void *compare_data)
 {
@@ -76,11 +91,12 @@ int component_master_add_child(struct master *master,
 	int ret = -ENXIO;
 
 	list_for_each_entry(c, &component_list, node) {
-		if (c->master)
+		if (c->master && c->master != master)
 			continue;
 
 		if (compare(c->dev, compare_data)) {
-			component_attach_master(master, c);
+			if (!c->master)
+				component_attach_master(master, c);
 			ret = 0;
 			break;
 		}
@@ -90,6 +106,34 @@ int component_master_add_child(struct master *master,
 }
 EXPORT_SYMBOL_GPL(component_master_add_child);
 
+static int find_components(struct master *master)
+{
+	struct component_match *match = master->match;
+	size_t i;
+	int ret = 0;
+
+	if (!match) {
+		/*
+		 * Search the list of components, looking for components that
+		 * belong to this master, and attach them to the master.
+		 */
+		return master->ops->add_components(master->dev, master);
+	}
+
+	/*
+	 * Scan the array of match functions and attach
+	 * any components which are found to this master.
+	 */
+	for (i = 0; i < match->num; i++) {
+		ret = component_master_add_child(master,
+						 match->compare[i].fn,
+						 match->compare[i].data);
+		if (ret)
+			break;
+	}
+	return ret;
+}
+
 /* Detach all attached components from this master */
 static void master_remove_components(struct master *master)
 {
@@ -113,44 +157,44 @@ static void master_remove_components(struct master *master)
 static int try_to_bring_up_master(struct master *master,
 	struct component *component)
 {
-	int ret = 0;
+	int ret;
 
-	if (!master->bound) {
-		/*
-		 * Search the list of components, looking for components that
-		 * belong to this master, and attach them to the master.
-		 */
-		if (master->ops->add_components(master->dev, master)) {
-			/* Failed to find all components */
-			master_remove_components(master);
-			ret = 0;
-			goto out;
-		}
+	if (master->bound)
+		return 0;
 
-		if (component && component->master != master) {
-			master_remove_components(master);
-			ret = 0;
-			goto out;
-		}
+	/*
+	 * Search the list of components, looking for components that
+	 * belong to this master, and attach them to the master.
+	 */
+	if (find_components(master)) {
+		/* Failed to find all components */
+		ret = 0;
+		goto out;
+	}
 
-		if (!devres_open_group(master->dev, NULL, GFP_KERNEL)) {
-			ret = -ENOMEM;
-			goto out;
-		}
+	if (component && component->master != master) {
+		ret = 0;
+		goto out;
+	}
 
-		/* Found all components */
-		ret = master->ops->bind(master->dev);
-		if (ret < 0) {
-			devres_release_group(master->dev, NULL);
-			dev_info(master->dev, "master bind failed: %d\n", ret);
-			master_remove_components(master);
-			goto out;
-		}
+	if (!devres_open_group(master->dev, NULL, GFP_KERNEL)) {
+		ret = -ENOMEM;
+		goto out;
+	}
 
-		master->bound = true;
-		ret = 1;
+	/* Found all components */
+	ret = master->ops->bind(master->dev);
+	if (ret < 0) {
+		devres_release_group(master->dev, NULL);
+		dev_info(master->dev, "master bind failed: %d\n", ret);
+		goto out;
 	}
+
+	master->bound = true;
+	return 1;
+
 out:
+	master_remove_components(master);
 
 	return ret;
 }
@@ -180,18 +224,89 @@ static void take_down_master(struct master *master)
 	master_remove_components(master);
 }
 
-int component_master_add(struct device *dev,
-	const struct component_master_ops *ops)
+static size_t component_match_size(size_t num)
+{
+	return offsetof(struct component_match, compare[num]);
+}
+
+static struct component_match *component_match_realloc(struct device *dev,
+	struct component_match *match, size_t num)
+{
+	struct component_match *new;
+
+	if (match && match->alloc == num)
+		return match;
+
+	new = devm_kmalloc(dev, component_match_size(num), GFP_KERNEL);
+	if (!new)
+		return ERR_PTR(-ENOMEM);
+
+	if (match) {
+		memcpy(new, match, component_match_size(min(match->num, num)));
+		devm_kfree(dev, match);
+	} else {
+		new->num = 0;
+	}
+
+	new->alloc = num;
+
+	return new;
+}
+
+/*
+ * Add a component to be matched.
+ *
+ * The match array is first created or extended if necessary.
+ */
+void component_match_add(struct device *dev, struct component_match **matchptr,
+	int (*compare)(struct device *, void *), void *compare_data)
+{
+	struct component_match *match = *matchptr;
+
+	if (IS_ERR(match))
+		return;
+
+	if (!match || match->num == match->alloc) {
+		size_t new_size = match ? match->alloc + 16 : 15;
+
+		match = component_match_realloc(dev, match, new_size);
+
+		*matchptr = match;
+
+		if (IS_ERR(match))
+			return;
+	}
+
+	match->compare[match->num].fn = compare;
+	match->compare[match->num].data = compare_data;
+	match->num++;
+}
+EXPORT_SYMBOL(component_match_add);
+
+int component_master_add_with_match(struct device *dev,
+	const struct component_master_ops *ops,
+	struct component_match *match)
 {
 	struct master *master;
 	int ret;
 
+	if (ops->add_components && match)
+		return -EINVAL;
+
+	if (match) {
+		/* Reallocate the match array for its true size */
+		match = component_match_realloc(dev, match, match->num);
+		if (IS_ERR(match))
+			return PTR_ERR(match);
+	}
+
 	master = kzalloc(sizeof(*master), GFP_KERNEL);
 	if (!master)
 		return -ENOMEM;
 
 	master->dev = dev;
 	master->ops = ops;
+	master->match = match;
 	INIT_LIST_HEAD(&master->components);
 
 	/* Add to the list of available masters. */
@@ -209,6 +324,13 @@ int component_master_add(struct device *dev,
 
 	return ret < 0 ? ret : 0;
 }
+EXPORT_SYMBOL_GPL(component_master_add_with_match);
+
+int component_master_add(struct device *dev,
+	const struct component_master_ops *ops)
+{
+	return component_master_add_with_match(dev, ops, NULL);
+}
 EXPORT_SYMBOL_GPL(component_master_add);
 
 void component_master_del(struct device *dev,

drivers/base/firmware_class.c

@@ -100,10 +100,16 @@ static inline long firmware_loading_timeout(void)
 #define FW_OPT_UEVENT	(1U << 0)
 #define FW_OPT_NOWAIT	(1U << 1)
 #ifdef CONFIG_FW_LOADER_USER_HELPER
-#define FW_OPT_FALLBACK	(1U << 2)
+#define FW_OPT_USERHELPER	(1U << 2)
 #else
-#define FW_OPT_FALLBACK	0
+#define FW_OPT_USERHELPER	0
 #endif
+#ifdef CONFIG_FW_LOADER_USER_HELPER_FALLBACK
+#define FW_OPT_FALLBACK		FW_OPT_USERHELPER
+#else
+#define FW_OPT_FALLBACK		0
+#endif
+#define FW_OPT_NO_WARN	(1U << 3)
 
 struct firmware_cache {
 	/* firmware_buf instance will be added into the below list */
@@ -279,26 +285,15 @@ static const char * const fw_path[] = {
 module_param_string(path, fw_path_para, sizeof(fw_path_para), 0644);
 MODULE_PARM_DESC(path, "customized firmware image search path with a higher priority than default path");
 
-/* Don't inline this: 'struct kstat' is biggish */
-static noinline_for_stack int fw_file_size(struct file *file)
-{
-	struct kstat st;
-	if (vfs_getattr(&file->f_path, &st))
-		return -1;
-	if (!S_ISREG(st.mode))
-		return -1;
-	if (st.size != (int)st.size)
-		return -1;
-	return st.size;
-}
-
 static int fw_read_file_contents(struct file *file, struct firmware_buf *fw_buf)
 {
 	int size;
 	char *buf;
 	int rc;
 
-	size = fw_file_size(file);
+	if (!S_ISREG(file_inode(file)->i_mode))
+		return -EINVAL;
+	size = i_size_read(file_inode(file));
 	if (size <= 0)
 		return -EINVAL;
 	buf = vmalloc(size);
@@ -718,7 +713,7 @@ static ssize_t firmware_data_read(struct file *filp, struct kobject *kobj,
 static int fw_realloc_buffer(struct firmware_priv *fw_priv, int min_size)
 {
 	struct firmware_buf *buf = fw_priv->buf;
-	int pages_needed = ALIGN(min_size, PAGE_SIZE) >> PAGE_SHIFT;
+	int pages_needed = PAGE_ALIGN(min_size) >> PAGE_SHIFT;
 
 	/* If the array of pages is too small, grow it... */
 	if (buf->page_array_size < pages_needed) {
@@ -911,7 +906,9 @@ static int _request_firmware_load(struct firmware_priv *fw_priv,
 	wait_for_completion(&buf->completion);
 
 	cancel_delayed_work_sync(&fw_priv->timeout_work);
-	if (!buf->data)
+	if (is_fw_load_aborted(buf))
+		retval = -EAGAIN;
+	else if (!buf->data)
 		retval = -ENOMEM;
 
 	device_remove_file(f_dev, &dev_attr_loading);
@@ -1111,10 +1108,11 @@ _request_firmware(const struct firmware **firmware_p, const char *name,
 
 	ret = fw_get_filesystem_firmware(device, fw->priv);
 	if (ret) {
-		if (opt_flags & FW_OPT_FALLBACK) {
+		if (!(opt_flags & FW_OPT_NO_WARN))
 			dev_warn(device,
-				 "Direct firmware load failed with error %d\n",
-				 ret);
+				 "Direct firmware load for %s failed with error %d\n",
+				 name, ret);
+		if (opt_flags & FW_OPT_USERHELPER) {
 			dev_warn(device, "Falling back to user helper\n");
 			ret = fw_load_from_user_helper(fw, name, device,
 						       opt_flags, timeout);
@@ -1171,7 +1169,6 @@ request_firmware(const struct firmware **firmware_p, const char *name,
 }
 EXPORT_SYMBOL(request_firmware);
 
-#ifdef CONFIG_FW_LOADER_USER_HELPER
 /**
  * request_firmware: - load firmware directly without usermode helper
  * @firmware_p: pointer to firmware image
@@ -1188,12 +1185,12 @@ int request_firmware_direct(const struct firmware **firmware_p,
 {
 	int ret;
 	__module_get(THIS_MODULE);
-	ret = _request_firmware(firmware_p, name, device, FW_OPT_UEVENT);
+	ret = _request_firmware(firmware_p, name, device,
+				FW_OPT_UEVENT | FW_OPT_NO_WARN);
 	module_put(THIS_MODULE);
 	return ret;
 }
 EXPORT_SYMBOL_GPL(request_firmware_direct);
-#endif
 
 /**
  * release_firmware: - release the resource associated with a firmware image
@@ -1277,7 +1274,7 @@ request_firmware_nowait(
 	fw_work->context = context;
 	fw_work->cont = cont;
 	fw_work->opt_flags = FW_OPT_NOWAIT | FW_OPT_FALLBACK |
-		(uevent ? FW_OPT_UEVENT : 0);
+		(uevent ? FW_OPT_UEVENT : FW_OPT_USERHELPER);
 
 	if (!try_module_get(module)) {
 		kfree(fw_work);

drivers/base/platform.c

@@ -24,6 +24,7 @@
 #include <linux/idr.h>
 #include <linux/acpi.h>
 #include <linux/clk/clk-conf.h>
+#include <linux/limits.h>
 
 #include "base.h"
 #include "power/power.h"
@@ -176,7 +177,7 @@ EXPORT_SYMBOL_GPL(platform_add_devices);
 
 struct platform_object {
 	struct platform_device pdev;
-	char name[1];
+	char name[];
 };
 
 /**
@@ -202,6 +203,7 @@ static void platform_device_release(struct device *dev)
 	kfree(pa->pdev.dev.platform_data);
 	kfree(pa->pdev.mfd_cell);
 	kfree(pa->pdev.resource);
+	kfree(pa->pdev.driver_override);
 	kfree(pa);
 }
 
@@ -217,7 +219,7 @@ struct platform_device *platform_device_alloc(const char *name, int id)
 {
 	struct platform_object *pa;
 
-	pa = kzalloc(sizeof(struct platform_object) + strlen(name), GFP_KERNEL);
+	pa = kzalloc(sizeof(*pa) + strlen(name) + 1, GFP_KERNEL);
 	if (pa) {
 		strcpy(pa->name, name);
 		pa->pdev.name = pa->name;
@@ -713,8 +715,49 @@ static ssize_t modalias_show(struct device *dev, struct device_attribute *a,
 }
 static DEVICE_ATTR_RO(modalias);
 
+static ssize_t driver_override_store(struct device *dev,
+				     struct device_attribute *attr,
+				     const char *buf, size_t count)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	char *driver_override, *old = pdev->driver_override, *cp;
+
+	if (count > PATH_MAX)
+		return -EINVAL;
+
+	driver_override = kstrndup(buf, count, GFP_KERNEL);
+	if (!driver_override)
+		return -ENOMEM;
+
+	cp = strchr(driver_override, '\n');
+	if (cp)
+		*cp = '\0';
+
+	if (strlen(driver_override)) {
+		pdev->driver_override = driver_override;
+	} else {
+		kfree(driver_override);
+		pdev->driver_override = NULL;
+	}
+
+	kfree(old);
+
+	return count;
+}
+
+static ssize_t driver_override_show(struct device *dev,
+				    struct device_attribute *attr, char *buf)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+
+	return sprintf(buf, "%s\n", pdev->driver_override);
+}
+static DEVICE_ATTR_RW(driver_override);
+
+
 static struct attribute *platform_dev_attrs[] = {
 	&dev_attr_modalias.attr,
+	&dev_attr_driver_override.attr,
 	NULL,
 };
 ATTRIBUTE_GROUPS(platform_dev);
@@ -770,6 +813,10 @@ static int platform_match(struct device *dev, struct device_driver *drv)
 	struct platform_device *pdev = to_platform_device(dev);
 	struct platform_driver *pdrv = to_platform_driver(drv);
 
+	/* When driver_override is set, only bind to the matching driver */
+	if (pdev->driver_override)
+		return !strcmp(pdev->driver_override, drv->name);
+
 	/* Attempt an OF style match first */
 	if (of_driver_match_device(dev, drv))
 		return 1;

drivers/base/reservation.c

-/*
- * Copyright (C) 2012-2013 Canonical Ltd
- *
- * Based on bo.c which bears the following copyright notice,
- * but is dual licensed:
- *
- * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA
- * All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the
- * "Software"), to deal in the Software without restriction, including
- * without limitation the rights to use, copy, modify, merge, publish,
- * distribute, sub license, and/or sell copies of the Software, and to
- * permit persons to whom the Software is furnished to do so, subject to
- * the following conditions:
- *
- * The above copyright notice and this permission notice (including the
- * next paragraph) shall be included in all copies or substantial portions
- * of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
- * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
- * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
- * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
- * USE OR OTHER DEALINGS IN THE SOFTWARE.
- *
- **************************************************************************/
-/*
- * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
- */
-
-#include <linux/reservation.h>
-#include <linux/export.h>
-
-DEFINE_WW_CLASS(reservation_ww_class);
-EXPORT_SYMBOL(reservation_ww_class);

drivers/bus/brcmstb_gisb.c

@@ -212,9 +212,9 @@ static int brcmstb_gisb_arb_probe(struct platform_device *pdev)
 	mutex_init(&gdev->lock);
 	INIT_LIST_HEAD(&gdev->next);
 
-	gdev->base = devm_request_and_ioremap(&pdev->dev, r);
-	if (!gdev->base)
-		return -ENOMEM;
+	gdev->base = devm_ioremap_resource(&pdev->dev, r);
+	if (IS_ERR(gdev->base))
+		return PTR_ERR(gdev->base);
 
 	err = devm_request_irq(&pdev->dev, timeout_irq,
 				brcmstb_gisb_timeout_handler, 0, pdev->name,

drivers/dma-buf/Makefile

+obj-y := dma-buf.o fence.o reservation.o seqno-fence.o

drivers/base/dma-buf.c → drivers/dma-buf/dma-buf.c

@@ -25,10 +25,13 @@
 #include <linux/fs.h>
 #include <linux/slab.h>
 #include <linux/dma-buf.h>
+#include <linux/fence.h>
 #include <linux/anon_inodes.h>
 #include <linux/export.h>
 #include <linux/debugfs.h>
 #include <linux/seq_file.h>
+#include <linux/poll.h>
+#include <linux/reservation.h>
 
 static inline int is_dma_buf_file(struct file *);
 
@@ -50,12 +53,25 @@ static int dma_buf_release(struct inode *inode, struct file *file)
 
 	BUG_ON(dmabuf->vmapping_counter);
 
+	/*
+	 * Any fences that a dma-buf poll can wait on should be signaled
+	 * before releasing dma-buf. This is the responsibility of each
+	 * driver that uses the reservation objects.
+	 *
+	 * If you hit this BUG() it means someone dropped their ref to the
+	 * dma-buf while still having pending operation to the buffer.
+	 */
+	BUG_ON(dmabuf->cb_shared.active || dmabuf->cb_excl.active);
+
 	dmabuf->ops->release(dmabuf);
 
 	mutex_lock(&db_list.lock);
 	list_del(&dmabuf->list_node);
 	mutex_unlock(&db_list.lock);
 
+	if (dmabuf->resv == (struct reservation_object *)&dmabuf[1])
+		reservation_object_fini(dmabuf->resv);
+
 	kfree(dmabuf);
 	return 0;
 }
@@ -103,10 +119,141 @@ static loff_t dma_buf_llseek(struct file *file, loff_t offset, int whence)
 	return base + offset;
 }
 
+static void dma_buf_poll_cb(struct fence *fence, struct fence_cb *cb)
+{
+	struct dma_buf_poll_cb_t *dcb = (struct dma_buf_poll_cb_t *)cb;
+	unsigned long flags;
+
+	spin_lock_irqsave(&dcb->poll->lock, flags);
+	wake_up_locked_poll(dcb->poll, dcb->active);
+	dcb->active = 0;
+	spin_unlock_irqrestore(&dcb->poll->lock, flags);
+}
+
+static unsigned int dma_buf_poll(struct file *file, poll_table *poll)
+{
+	struct dma_buf *dmabuf;
+	struct reservation_object *resv;
+	struct reservation_object_list *fobj;
+	struct fence *fence_excl;
+	unsigned long events;
+	unsigned shared_count, seq;
+
+	dmabuf = file->private_data;
+	if (!dmabuf || !dmabuf->resv)
+		return POLLERR;
+
+	resv = dmabuf->resv;
+
+	poll_wait(file, &dmabuf->poll, poll);
+
+	events = poll_requested_events(poll) & (POLLIN | POLLOUT);
+	if (!events)
+		return 0;
+
+retry:
+	seq = read_seqcount_begin(&resv->seq);
+	rcu_read_lock();
+
+	fobj = rcu_dereference(resv->fence);
+	if (fobj)
+		shared_count = fobj->shared_count;
+	else
+		shared_count = 0;
+	fence_excl = rcu_dereference(resv->fence_excl);
+	if (read_seqcount_retry(&resv->seq, seq)) {
+		rcu_read_unlock();
+		goto retry;
+	}
+
+	if (fence_excl && (!(events & POLLOUT) || shared_count == 0)) {
+		struct dma_buf_poll_cb_t *dcb = &dmabuf->cb_excl;
+		unsigned long pevents = POLLIN;
+
+		if (shared_count == 0)
+			pevents |= POLLOUT;
+
+		spin_lock_irq(&dmabuf->poll.lock);
+		if (dcb->active) {
+			dcb->active |= pevents;
+			events &= ~pevents;
+		} else
+			dcb->active = pevents;
+		spin_unlock_irq(&dmabuf->poll.lock);
+
+		if (events & pevents) {
+			if (!fence_get_rcu(fence_excl)) {
+				/* force a recheck */
+				events &= ~pevents;
+				dma_buf_poll_cb(NULL, &dcb->cb);
+			} else if (!fence_add_callback(fence_excl, &dcb->cb,
+						       dma_buf_poll_cb)) {
+				events &= ~pevents;
+				fence_put(fence_excl);
+			} else {
+				/*
+				 * No callback queued, wake up any additional
+				 * waiters.
+				 */
+				fence_put(fence_excl);
+				dma_buf_poll_cb(NULL, &dcb->cb);
+			}
+		}
+	}
+
+	if ((events & POLLOUT) && shared_count > 0) {
+		struct dma_buf_poll_cb_t *dcb = &dmabuf->cb_shared;
+		int i;
+
+		/* Only queue a new callback if no event has fired yet */
+		spin_lock_irq(&dmabuf->poll.lock);
+		if (dcb->active)
+			events &= ~POLLOUT;
+		else
+			dcb->active = POLLOUT;
+		spin_unlock_irq(&dmabuf->poll.lock);
+
+		if (!(events & POLLOUT))
+			goto out;
+
+		for (i = 0; i < shared_count; ++i) {
+			struct fence *fence = rcu_dereference(fobj->shared[i]);
+
+			if (!fence_get_rcu(fence)) {
+				/*
+				 * fence refcount dropped to zero, this means
+				 * that fobj has been freed
+				 *
+				 * call dma_buf_poll_cb and force a recheck!
+				 */
+				events &= ~POLLOUT;
+				dma_buf_poll_cb(NULL, &dcb->cb);
+				break;
+			}
+			if (!fence_add_callback(fence, &dcb->cb,
+						dma_buf_poll_cb)) {
+				fence_put(fence);
+				events &= ~POLLOUT;
+				break;
+			}
+			fence_put(fence);
+		}
+
+		/* No callback queued, wake up any additional waiters. */
+		if (i == shared_count)
+			dma_buf_poll_cb(NULL, &dcb->cb);
+	}
+
+out:
+	rcu_read_unlock();
+	return events;
+}
+
 static const struct file_operations dma_buf_fops = {
 	.release	= dma_buf_release,
 	.mmap		= dma_buf_mmap_internal,
 	.llseek		= dma_buf_llseek,
+	.poll		= dma_buf_poll,
 };
 
 /*
@@ -128,6 +275,7 @@ static inline int is_dma_buf_file(struct file *file)
  * @size:	[in]	Size of the buffer
  * @flags:	[in]	mode flags for the file.
  * @exp_name:	[in]	name of the exporting module - useful for debugging.
+ * @resv:	[in]	reservation-object, NULL to allocate default one.
  *
  * Returns, on success, a newly created dma_buf object, which wraps the
  * supplied private data and operations for dma_buf_ops. On either missing
@@ -135,10 +283,17 @@ static inline int is_dma_buf_file(struct file *file)
  *
  */
 struct dma_buf *dma_buf_export_named(void *priv, const struct dma_buf_ops *ops,
-				size_t size, int flags, const char *exp_name)
+				size_t size, int flags, const char *exp_name,
+				struct reservation_object *resv)
 {
 	struct dma_buf *dmabuf;
 	struct file *file;
+	size_t alloc_size = sizeof(struct dma_buf);
+	if (!resv)
+		alloc_size += sizeof(struct reservation_object);
+	else
+		/* prevent &dma_buf[1] == dma_buf->resv */
+		alloc_size += 1;
 
 	if (WARN_ON(!priv || !ops
 			  || !ops->map_dma_buf
@@ -150,7 +305,7 @@ struct dma_buf *dma_buf_export_named(void *priv, const struct dma_buf_ops *ops,
 		return ERR_PTR(-EINVAL);
 	}
 
-	dmabuf = kzalloc(sizeof(struct dma_buf), GFP_KERNEL);
+	dmabuf = kzalloc(alloc_size, GFP_KERNEL);
 	if (dmabuf == NULL)
 		return ERR_PTR(-ENOMEM);
 
@@ -158,6 +313,15 @@ struct dma_buf *dma_buf_export_named(void *priv, const struct dma_buf_ops *ops,
 	dmabuf->ops = ops;
 	dmabuf->size = size;
 	dmabuf->exp_name = exp_name;
+	init_waitqueue_head(&dmabuf->poll);
+	dmabuf->cb_excl.poll = dmabuf->cb_shared.poll = &dmabuf->poll;
+	dmabuf->cb_excl.active = dmabuf->cb_shared.active = 0;
+
+	if (!resv) {
+		resv = (struct reservation_object *)&dmabuf[1];
+		reservation_object_init(resv);
+	}
+	dmabuf->resv = resv;
 
 	file = anon_inode_getfile("dmabuf", &dma_buf_fops, dmabuf, flags);
 	if (IS_ERR(file)) {

drivers/dma-buf/seqno-fence.c

+/*
+ * seqno-fence, using a dma-buf to synchronize fencing
+ *
+ * Copyright (C) 2012 Texas Instruments
+ * Copyright (C) 2012-2014 Canonical Ltd
+ * Authors:
+ *   Rob Clark <robdclark@gmail.com>
+ *   Maarten Lankhorst <maarten.lankhorst@canonical.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ */
+
+#include <linux/slab.h>
+#include <linux/export.h>
+#include <linux/seqno-fence.h>
+
+static const char *seqno_fence_get_driver_name(struct fence *fence)
+{
+	struct seqno_fence *seqno_fence = to_seqno_fence(fence);
+	return seqno_fence->ops->get_driver_name(fence);
+}
+
+static const char *seqno_fence_get_timeline_name(struct fence *fence)
+{
+	struct seqno_fence *seqno_fence = to_seqno_fence(fence);
+	return seqno_fence->ops->get_timeline_name(fence);
+}
+
+static bool seqno_enable_signaling(struct fence *fence)
+{
+	struct seqno_fence *seqno_fence = to_seqno_fence(fence);
+	return seqno_fence->ops->enable_signaling(fence);
+}
+
+static bool seqno_signaled(struct fence *fence)
+{
+	struct seqno_fence *seqno_fence = to_seqno_fence(fence);
+	return seqno_fence->ops->signaled && seqno_fence->ops->signaled(fence);
+}
+
+static void seqno_release(struct fence *fence)
+{
+	struct seqno_fence *f = to_seqno_fence(fence);
+
+	dma_buf_put(f->sync_buf);
+	if (f->ops->release)
+		f->ops->release(fence);
+	else
+		fence_free(&f->base);
+}
+
+static signed long seqno_wait(struct fence *fence, bool intr, signed long timeout)
+{
+	struct seqno_fence *f = to_seqno_fence(fence);
+	return f->ops->wait(fence, intr, timeout);
+}
+
+const struct fence_ops seqno_fence_ops = {
+	.get_driver_name = seqno_fence_get_driver_name,
+	.get_timeline_name = seqno_fence_get_timeline_name,
+	.enable_signaling = seqno_enable_signaling,
+	.signaled = seqno_signaled,
+	.wait = seqno_wait,
+	.release = seqno_release,
+};
+EXPORT_SYMBOL(seqno_fence_ops);

drivers/gpu/drm/armada/armada_crtc.c

@@ -1039,11 +1039,9 @@ int armada_drm_crtc_create(struct drm_device *dev, unsigned num,
 	if (ret)
 		return ret;
 
-	base = devm_request_and_ioremap(dev->dev, res);
-	if (!base) {
-		DRM_ERROR("failed to ioremap register\n");
-		return -ENOMEM;
-	}
+	base = devm_ioremap_resource(dev->dev, res);
+	if (IS_ERR(base))
+		return PTR_ERR(base);
 
 	dcrtc = kzalloc(sizeof(*dcrtc), GFP_KERNEL);
 	if (!dcrtc) {

drivers/gpu/drm/armada/armada_gem.c

@@ -539,7 +539,7 @@ armada_gem_prime_export(struct drm_device *dev, struct drm_gem_object *obj,
 	int flags)
 {
 	return dma_buf_export(obj, &armada_gem_prime_dmabuf_ops, obj->size,
-			      O_RDWR);
+			      O_RDWR, NULL);
 }
 
 struct drm_gem_object *

drivers/gpu/drm/drm_prime.c

@@ -336,7 +336,13 @@ static const struct dma_buf_ops drm_gem_prime_dmabuf_ops =  {
 struct dma_buf *drm_gem_prime_export(struct drm_device *dev,
 				     struct drm_gem_object *obj, int flags)
 {
-	return dma_buf_export(obj, &drm_gem_prime_dmabuf_ops, obj->size, flags);
+	struct reservation_object *robj = NULL;
+
+	if (dev->driver->gem_prime_res_obj)
+		robj = dev->driver->gem_prime_res_obj(obj);
+
+	return dma_buf_export(obj, &drm_gem_prime_dmabuf_ops, obj->size,
+			      flags, robj);
 }
 EXPORT_SYMBOL(drm_gem_prime_export);
 

drivers/gpu/drm/exynos/exynos_drm_dmabuf.c

@@ -187,7 +187,7 @@ struct dma_buf *exynos_dmabuf_prime_export(struct drm_device *drm_dev,
 	struct exynos_drm_gem_obj *exynos_gem_obj = to_exynos_gem_obj(obj);
 
 	return dma_buf_export(obj, &exynos_dmabuf_ops,
-				exynos_gem_obj->base.size, flags);
+				exynos_gem_obj->base.size, flags, NULL);
 }
 
 struct drm_gem_object *exynos_dmabuf_prime_import(struct drm_device *drm_dev,

drivers/gpu/drm/i915/i915_gem_dmabuf.c

@@ -237,7 +237,8 @@ struct dma_buf *i915_gem_prime_export(struct drm_device *dev,
 			return ERR_PTR(ret);
 	}
 
-	return dma_buf_export(gem_obj, &i915_dmabuf_ops, gem_obj->size, flags);
+	return dma_buf_export(gem_obj, &i915_dmabuf_ops, gem_obj->size, flags,
+			      NULL);
 }
 
 static int i915_gem_object_get_pages_dmabuf(struct drm_i915_gem_object *obj)

drivers/gpu/drm/nouveau/nouveau_drm.c

@@ -845,6 +845,7 @@ driver = {
 	.gem_prime_export = drm_gem_prime_export,
 	.gem_prime_import = drm_gem_prime_import,
 	.gem_prime_pin = nouveau_gem_prime_pin,
+	.gem_prime_res_obj = nouveau_gem_prime_res_obj,
 	.gem_prime_unpin = nouveau_gem_prime_unpin,
 	.gem_prime_get_sg_table = nouveau_gem_prime_get_sg_table,
 	.gem_prime_import_sg_table = nouveau_gem_prime_import_sg_table,

drivers/gpu/drm/nouveau/nouveau_gem.h

@@ -35,6 +35,7 @@ extern int nouveau_gem_ioctl_info(struct drm_device *, void *,
 				  struct drm_file *);
 
 extern int nouveau_gem_prime_pin(struct drm_gem_object *);
+struct reservation_object *nouveau_gem_prime_res_obj(struct drm_gem_object *);
 extern void nouveau_gem_prime_unpin(struct drm_gem_object *);
 extern struct sg_table *nouveau_gem_prime_get_sg_table(struct drm_gem_object *);
 extern struct drm_gem_object *nouveau_gem_prime_import_sg_table(

drivers/gpu/drm/nouveau/nouveau_prime.c

@@ -102,3 +102,10 @@ void nouveau_gem_prime_unpin(struct drm_gem_object *obj)
 
 	nouveau_bo_unpin(nvbo);
 }
+
+struct reservation_object *nouveau_gem_prime_res_obj(struct drm_gem_object *obj)
+{
+	struct nouveau_bo *nvbo = nouveau_gem_object(obj);
+
+	return nvbo->bo.resv;
+}

drivers/gpu/drm/omapdrm/omap_gem_dmabuf.c

@@ -171,7 +171,7 @@ static struct dma_buf_ops omap_dmabuf_ops = {
 struct dma_buf *omap_gem_prime_export(struct drm_device *dev,
 		struct drm_gem_object *obj, int flags)
 {
-	return dma_buf_export(obj, &omap_dmabuf_ops, obj->size, flags);
+	return dma_buf_export(obj, &omap_dmabuf_ops, obj->size, flags, NULL);
 }
 
 struct drm_gem_object *omap_gem_prime_import(struct drm_device *dev,

drivers/gpu/drm/radeon/radeon_drv.c

@@ -132,6 +132,7 @@ struct drm_gem_object *radeon_gem_prime_import_sg_table(struct drm_device *dev,
 							struct sg_table *sg);
 int radeon_gem_prime_pin(struct drm_gem_object *obj);
 void radeon_gem_prime_unpin(struct drm_gem_object *obj);
+struct reservation_object *radeon_gem_prime_res_obj(struct drm_gem_object *);
 void *radeon_gem_prime_vmap(struct drm_gem_object *obj);
 void radeon_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr);
 extern long radeon_kms_compat_ioctl(struct file *filp, unsigned int cmd,
@@ -566,6 +567,7 @@ static struct drm_driver kms_driver = {
 	.gem_prime_import = drm_gem_prime_import,
 	.gem_prime_pin = radeon_gem_prime_pin,
 	.gem_prime_unpin = radeon_gem_prime_unpin,
+	.gem_prime_res_obj = radeon_gem_prime_res_obj,
 	.gem_prime_get_sg_table = radeon_gem_prime_get_sg_table,
 	.gem_prime_import_sg_table = radeon_gem_prime_import_sg_table,
 	.gem_prime_vmap = radeon_gem_prime_vmap,

drivers/gpu/drm/radeon/radeon_prime.c

@@ -103,3 +103,11 @@ void radeon_gem_prime_unpin(struct drm_gem_object *obj)
 	radeon_bo_unpin(bo);
 	radeon_bo_unreserve(bo);
 }
+
+
+struct reservation_object *radeon_gem_prime_res_obj(struct drm_gem_object *obj)
+{
+	struct radeon_bo *bo = gem_to_radeon_bo(obj);
+
+	return bo->tbo.resv;
+}

drivers/gpu/drm/tegra/gem.c

@@ -420,7 +420,7 @@ struct dma_buf *tegra_gem_prime_export(struct drm_device *drm,
 				       int flags)
 {
 	return dma_buf_export(gem, &tegra_gem_prime_dmabuf_ops, gem->size,
-			      flags);
+			      flags, NULL);
 }
 
 struct drm_gem_object *tegra_gem_prime_import(struct drm_device *drm,

drivers/gpu/drm/ttm/ttm_object.c

@@ -695,7 +695,7 @@ int ttm_prime_handle_to_fd(struct ttm_object_file *tfile,
 		}
 
 		dma_buf = dma_buf_export(prime, &tdev->ops,
-					 prime->size, flags);
+					 prime->size, flags, NULL);
 		if (IS_ERR(dma_buf)) {
 			ret = PTR_ERR(dma_buf);
 			ttm_mem_global_free(tdev->mem_glob,

drivers/media/v4l2-core/videobuf2-dma-contig.c

@@ -404,7 +404,7 @@ static struct dma_buf *vb2_dc_get_dmabuf(void *buf_priv, unsigned long flags)
 	if (WARN_ON(!buf->sgt_base))
 		return NULL;
 
-	dbuf = dma_buf_export(buf, &vb2_dc_dmabuf_ops, buf->size, flags);
+	dbuf = dma_buf_export(buf, &vb2_dc_dmabuf_ops, buf->size, flags, NULL);
 	if (IS_ERR(dbuf))
 		return NULL;
 

drivers/staging/android/Kconfig

@@ -88,6 +88,7 @@ config SYNC
 	bool "Synchronization framework"
 	default n
 	select ANON_INODES
+	select DMA_SHARED_BUFFER
 	---help---
 	  This option enables the framework for synchronization between multiple
 	  drivers.  Sync implementations can take advantage of hardware

drivers/staging/android/Makefile

@@ -9,5 +9,5 @@ obj-$(CONFIG_ANDROID_TIMED_OUTPUT)	+= timed_output.o
 obj-$(CONFIG_ANDROID_TIMED_GPIO)	+= timed_gpio.o
 obj-$(CONFIG_ANDROID_LOW_MEMORY_KILLER)	+= lowmemorykiller.o
 obj-$(CONFIG_ANDROID_INTF_ALARM_DEV)	+= alarm-dev.o
-obj-$(CONFIG_SYNC)			+= sync.o
+obj-$(CONFIG_SYNC)			+= sync.o sync_debug.o
 obj-$(CONFIG_SW_SYNC)			+= sw_sync.o

drivers/staging/android/ion/ion.c

@@ -1120,7 +1120,8 @@ struct dma_buf *ion_share_dma_buf(struct ion_client *client,
 	ion_buffer_get(buffer);
 	mutex_unlock(&client->lock);
 
-	dmabuf = dma_buf_export(buffer, &dma_buf_ops, buffer->size, O_RDWR);
+	dmabuf = dma_buf_export(buffer, &dma_buf_ops, buffer->size, O_RDWR,
+				NULL);
 	if (IS_ERR(dmabuf)) {
 		ion_buffer_put(buffer);
 		return dmabuf;

drivers/staging/android/sw_sync.c

@@ -50,7 +50,7 @@ static struct sync_pt *sw_sync_pt_dup(struct sync_pt *sync_pt)
 {
 	struct sw_sync_pt *pt = (struct sw_sync_pt *) sync_pt;
 	struct sw_sync_timeline *obj =
-		(struct sw_sync_timeline *)sync_pt->parent;
+		(struct sw_sync_timeline *)sync_pt_parent(sync_pt);
 
 	return (struct sync_pt *) sw_sync_pt_create(obj, pt->value);
 }
@@ -59,7 +59,7 @@ static int sw_sync_pt_has_signaled(struct sync_pt *sync_pt)
 {
 	struct sw_sync_pt *pt = (struct sw_sync_pt *)sync_pt;
 	struct sw_sync_timeline *obj =
-		(struct sw_sync_timeline *)sync_pt->parent;
+		(struct sw_sync_timeline *)sync_pt_parent(sync_pt);
 
 	return sw_sync_cmp(obj->value, pt->value) >= 0;
 }
@@ -97,7 +97,6 @@ static void sw_sync_pt_value_str(struct sync_pt *sync_pt,
 				       char *str, int size)
 {
 	struct sw_sync_pt *pt = (struct sw_sync_pt *)sync_pt;
-
 	snprintf(str, size, "%d", pt->value);
 }
 
@@ -157,7 +156,6 @@ static int sw_sync_open(struct inode *inode, struct file *file)
 static int sw_sync_release(struct inode *inode, struct file *file)
 {
 	struct sw_sync_timeline *obj = file->private_data;
-
 	sync_timeline_destroy(&obj->obj);
 	return 0;
 }

drivers/staging/android/sync.h

@@ -19,6 +19,7 @@
 #include <linux/list.h>
 #include <linux/spinlock.h>
 #include <linux/wait.h>
+#include <linux/fence.h>
 
 #include "uapi/sync.h"
 
@@ -40,8 +41,6 @@ struct sync_fence;
  *			 -1 if a will signal before b
  * @free_pt:		called before sync_pt is freed
  * @release_obj:	called before sync_timeline is freed
- * @print_obj:		deprecated
- * @print_pt:		deprecated
  * @fill_driver_data:	write implementation specific driver data to data.
  *			  should return an error if there is not enough room
  *			  as specified by size.  This information is returned
@@ -67,13 +66,6 @@ struct sync_timeline_ops {
 	/* optional */
 	void (*release_obj)(struct sync_timeline *sync_timeline);
 
-	/* deprecated */
-	void (*print_obj)(struct seq_file *s,
-			  struct sync_timeline *sync_timeline);
-
-	/* deprecated */
-	void (*print_pt)(struct seq_file *s, struct sync_pt *sync_pt);
-
 	/* optional */
 	int (*fill_driver_data)(struct sync_pt *syncpt, void *data, int size);
 
@@ -104,19 +96,21 @@ struct sync_timeline {
 
 	/* protected by child_list_lock */
 	bool			destroyed;
+	int			context, value;
 
 	struct list_head	child_list_head;
 	spinlock_t		child_list_lock;
 
 	struct list_head	active_list_head;
-	spinlock_t		active_list_lock;
 
+#ifdef CONFIG_DEBUG_FS
 	struct list_head	sync_timeline_list;
+#endif
 };
 
 /**
  * struct sync_pt - sync point
- * @parent:		sync_timeline to which this sync_pt belongs
+ * @fence:		base fence class
  * @child_list:		membership in sync_timeline.child_list_head
  * @active_list:	membership in sync_timeline.active_list_head
  * @signaled_list:	membership in temporary signaled_list on stack
@@ -127,19 +121,22 @@ struct sync_timeline {
  *			  signaled or error.
  */
 struct sync_pt {
-	struct sync_timeline		*parent;
-	struct list_head	child_list;
+	struct fence base;
 
+	struct list_head	child_list;
 	struct list_head	active_list;
-	struct list_head	signaled_list;
-
-	struct sync_fence	*fence;
-	struct list_head	pt_list;
+};
 
-	/* protected by parent->active_list_lock */
-	int			status;
+static inline struct sync_timeline *sync_pt_parent(struct sync_pt *pt)
+{
+	return container_of(pt->base.lock, struct sync_timeline,
+			    child_list_lock);
+}
 
-	ktime_t			timestamp;
+struct sync_fence_cb {
+	struct fence_cb cb;
+	struct fence *sync_pt;
+	struct sync_fence *fence;
 };
 
 /**
@@ -149,9 +146,7 @@ struct sync_pt {
  * @name:		name of sync_fence.  Useful for debugging
  * @pt_list_head:	list of sync_pts in the fence.  immutable once fence
  *			  is created
- * @waiter_list_head:	list of asynchronous waiters on this fence
- * @waiter_list_lock:	lock protecting @waiter_list_head and @status
- * @status:		1: signaled, 0:active, <0: error
+ * @status:		0: signaled, >0:active, <0: error
  *
  * @wq:			wait queue for fence signaling
  * @sync_fence_list:	membership in global fence list
@@ -160,17 +155,15 @@ struct sync_fence {
 	struct file		*file;
 	struct kref		kref;
 	char			name[32];
-
-	/* this list is immutable once the fence is created */
-	struct list_head	pt_list_head;
-
-	struct list_head	waiter_list_head;
-	spinlock_t		waiter_list_lock; /* also protects status */
-	int			status;
+#ifdef CONFIG_DEBUG_FS
+	struct list_head	sync_fence_list;
+#endif
+	int num_fences;
 
 	wait_queue_head_t	wq;
+	atomic_t		status;
 
-	struct list_head	sync_fence_list;
+	struct sync_fence_cb	cbs[];
 };
 
 struct sync_fence_waiter;
@@ -184,14 +177,14 @@ typedef void (*sync_callback_t)(struct sync_fence *fence,
  * @callback_data:	pointer to pass to @callback
  */
 struct sync_fence_waiter {
-	struct list_head	waiter_list;
-
-	sync_callback_t		callback;
+	wait_queue_t work;
+	sync_callback_t callback;
 };
 
 static inline void sync_fence_waiter_init(struct sync_fence_waiter *waiter,
 					  sync_callback_t callback)
 {
+	INIT_LIST_HEAD(&waiter->work.task_list);
 	waiter->callback = callback;
 }
 
@@ -341,4 +334,22 @@ int sync_fence_cancel_async(struct sync_fence *fence,
  */
 int sync_fence_wait(struct sync_fence *fence, long timeout);
 
+#ifdef CONFIG_DEBUG_FS
+
+extern void sync_timeline_debug_add(struct sync_timeline *obj);
+extern void sync_timeline_debug_remove(struct sync_timeline *obj);
+extern void sync_fence_debug_add(struct sync_fence *fence);
+extern void sync_fence_debug_remove(struct sync_fence *fence);
+extern void sync_dump(void);
+
+#else
+# define sync_timeline_debug_add(obj)
+# define sync_timeline_debug_remove(obj)
+# define sync_fence_debug_add(fence)
+# define sync_fence_debug_remove(fence)
+# define sync_dump()
+#endif
+int sync_fence_wake_up_wq(wait_queue_t *curr, unsigned mode,
+				 int wake_flags, void *key);
+
 #endif /* _LINUX_SYNC_H */

drivers/staging/android/sync_debug.c

+/*
+ * drivers/base/sync.c
+ *
+ * Copyright (C) 2012 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/debugfs.h>
+#include <linux/export.h>
+#include <linux/file.h>
+#include <linux/fs.h>
+#include <linux/kernel.h>
+#include <linux/poll.h>
+#include <linux/sched.h>
+#include <linux/seq_file.h>
+#include <linux/slab.h>
+#include <linux/uaccess.h>
+#include <linux/anon_inodes.h>
+#include "sync.h"
+
+#ifdef CONFIG_DEBUG_FS
+
+static LIST_HEAD(sync_timeline_list_head);
+static DEFINE_SPINLOCK(sync_timeline_list_lock);
+static LIST_HEAD(sync_fence_list_head);
+static DEFINE_SPINLOCK(sync_fence_list_lock);
+
+void sync_timeline_debug_add(struct sync_timeline *obj)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&sync_timeline_list_lock, flags);
+	list_add_tail(&obj->sync_timeline_list, &sync_timeline_list_head);
+	spin_unlock_irqrestore(&sync_timeline_list_lock, flags);
+}
+
+void sync_timeline_debug_remove(struct sync_timeline *obj)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&sync_timeline_list_lock, flags);
+	list_del(&obj->sync_timeline_list);
+	spin_unlock_irqrestore(&sync_timeline_list_lock, flags);
+}
+
+void sync_fence_debug_add(struct sync_fence *fence)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&sync_fence_list_lock, flags);
+	list_add_tail(&fence->sync_fence_list, &sync_fence_list_head);
+	spin_unlock_irqrestore(&sync_fence_list_lock, flags);
+}
+
+void sync_fence_debug_remove(struct sync_fence *fence)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&sync_fence_list_lock, flags);
+	list_del(&fence->sync_fence_list);
+	spin_unlock_irqrestore(&sync_fence_list_lock, flags);
+}
+
+static const char *sync_status_str(int status)
+{
+	if (status == 0)
+		return "signaled";
+
+	if (status > 0)
+		return "active";
+
+	return "error";
+}
+
+static void sync_print_pt(struct seq_file *s, struct sync_pt *pt, bool fence)
+{
+	int status = 1;
+	struct sync_timeline *parent = sync_pt_parent(pt);
+
+	if (fence_is_signaled_locked(&pt->base))
+		status = pt->base.status;
+
+	seq_printf(s, "  %s%spt %s",
+		   fence ? parent->name : "",
+		   fence ? "_" : "",
+		   sync_status_str(status));
+
+	if (status <= 0) {
+		struct timeval tv = ktime_to_timeval(pt->base.timestamp);
+
+		seq_printf(s, "@%ld.%06ld", tv.tv_sec, tv.tv_usec);
+	}
+
+	if (parent->ops->timeline_value_str &&
+	    parent->ops->pt_value_str) {
+		char value[64];
+
+		parent->ops->pt_value_str(pt, value, sizeof(value));
+		seq_printf(s, ": %s", value);
+		if (fence) {
+			parent->ops->timeline_value_str(parent, value,
+						    sizeof(value));
+			seq_printf(s, " / %s", value);
+		}
+	}
+
+	seq_puts(s, "\n");
+}
+
+static void sync_print_obj(struct seq_file *s, struct sync_timeline *obj)
+{
+	struct list_head *pos;
+	unsigned long flags;
+
+	seq_printf(s, "%s %s", obj->name, obj->ops->driver_name);
+
+	if (obj->ops->timeline_value_str) {
+		char value[64];
+
+		obj->ops->timeline_value_str(obj, value, sizeof(value));
+		seq_printf(s, ": %s", value);
+	}
+
+	seq_puts(s, "\n");
+
+	spin_lock_irqsave(&obj->child_list_lock, flags);
+	list_for_each(pos, &obj->child_list_head) {
+		struct sync_pt *pt =
+			container_of(pos, struct sync_pt, child_list);
+		sync_print_pt(s, pt, false);
+	}
+	spin_unlock_irqrestore(&obj->child_list_lock, flags);
+}
+
+static void sync_print_fence(struct seq_file *s, struct sync_fence *fence)
+{
+	wait_queue_t *pos;
+	unsigned long flags;
+	int i;
+
+	seq_printf(s, "[%p] %s: %s\n", fence, fence->name,
+		   sync_status_str(atomic_read(&fence->status)));
+
+	for (i = 0; i < fence->num_fences; ++i) {
+		struct sync_pt *pt =
+			container_of(fence->cbs[i].sync_pt,
+				     struct sync_pt, base);
+
+		sync_print_pt(s, pt, true);
+	}
+
+	spin_lock_irqsave(&fence->wq.lock, flags);
+	list_for_each_entry(pos, &fence->wq.task_list, task_list) {
+		struct sync_fence_waiter *waiter;
+
+		if (pos->func != &sync_fence_wake_up_wq)
+			continue;
+
+		waiter = container_of(pos, struct sync_fence_waiter, work);
+
+		seq_printf(s, "waiter %pF\n", waiter->callback);
+	}
+	spin_unlock_irqrestore(&fence->wq.lock, flags);
+}
+
+static int sync_debugfs_show(struct seq_file *s, void *unused)
+{
+	unsigned long flags;
+	struct list_head *pos;
+
+	seq_puts(s, "objs:\n--------------\n");
+
+	spin_lock_irqsave(&sync_timeline_list_lock, flags);
+	list_for_each(pos, &sync_timeline_list_head) {
+		struct sync_timeline *obj =
+			container_of(pos, struct sync_timeline,
+				     sync_timeline_list);
+
+		sync_print_obj(s, obj);
+		seq_puts(s, "\n");
+	}
+	spin_unlock_irqrestore(&sync_timeline_list_lock, flags);
+
+	seq_puts(s, "fences:\n--------------\n");
+
+	spin_lock_irqsave(&sync_fence_list_lock, flags);
+	list_for_each(pos, &sync_fence_list_head) {
+		struct sync_fence *fence =
+			container_of(pos, struct sync_fence, sync_fence_list);
+
+		sync_print_fence(s, fence);
+		seq_puts(s, "\n");
+	}
+	spin_unlock_irqrestore(&sync_fence_list_lock, flags);
+	return 0;
+}
+
+static int sync_debugfs_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, sync_debugfs_show, inode->i_private);
+}
+
+static const struct file_operations sync_debugfs_fops = {
+	.open           = sync_debugfs_open,
+	.read           = seq_read,
+	.llseek         = seq_lseek,
+	.release        = single_release,
+};
+
+static __init int sync_debugfs_init(void)
+{
+	debugfs_create_file("sync", S_IRUGO, NULL, NULL, &sync_debugfs_fops);
+	return 0;
+}
+late_initcall(sync_debugfs_init);
+
+#define DUMP_CHUNK 256
+static char sync_dump_buf[64 * 1024];
+void sync_dump(void)
+{
+	struct seq_file s = {
+		.buf = sync_dump_buf,
+		.size = sizeof(sync_dump_buf) - 1,
+	};
+	int i;
+
+	sync_debugfs_show(&s, NULL);
+
+	for (i = 0; i < s.count; i += DUMP_CHUNK) {
+		if ((s.count - i) > DUMP_CHUNK) {
+			char c = s.buf[i + DUMP_CHUNK];
+
+			s.buf[i + DUMP_CHUNK] = 0;
+			pr_cont("%s", s.buf + i);
+			s.buf[i + DUMP_CHUNK] = c;
+		} else {
+			s.buf[s.count] = 0;
+			pr_cont("%s", s.buf + i);
+		}
+	}
+}
+
+#endif

drivers/staging/android/trace/sync.h

@@ -45,7 +45,7 @@ TRACE_EVENT(sync_wait,
 
 	TP_fast_assign(
 			__assign_str(name, fence->name);
-			__entry->status = fence->status;
+			__entry->status = atomic_read(&fence->status);
 			__entry->begin = begin;
 	),
 
@@ -54,19 +54,19 @@ TRACE_EVENT(sync_wait,
 );
 
 TRACE_EVENT(sync_pt,
-	TP_PROTO(struct sync_pt *pt),
+	TP_PROTO(struct fence *pt),
 
 	TP_ARGS(pt),
 
 	TP_STRUCT__entry(
-		__string(timeline, pt->parent->name)
+		__string(timeline, pt->ops->get_timeline_name(pt))
 		__array(char, value, 32)
 	),
 
 	TP_fast_assign(
-		__assign_str(timeline, pt->parent->name);
-		if (pt->parent->ops->pt_value_str) {
-			pt->parent->ops->pt_value_str(pt, __entry->value,
+		__assign_str(timeline, pt->ops->get_timeline_name(pt));
+		if (pt->ops->fence_value_str) {
+			pt->ops->fence_value_str(pt, __entry->value,
 							sizeof(__entry->value));
 		} else {
 			__entry->value[0] = '\0';

fs/debugfs/file.c

@@ -451,7 +451,7 @@ static ssize_t read_file_bool(struct file *file, char __user *user_buf,
 {
 	char buf[3];
 	u32 *val = file->private_data;
-	
+
 	if (*val)
 		buf[0] = 'Y';
 	else

fs/debugfs/inode.c

@@ -66,7 +66,7 @@ static struct inode *debugfs_get_inode(struct super_block *sb, umode_t mode, dev
 			break;
 		}
 	}
-	return inode; 
+	return inode;
 }
 
 /* SMP-safe */
@@ -317,7 +317,7 @@ static struct dentry *__create_file(const char *name, umode_t mode,
 		goto exit;
 
 	/* If the parent is not specified, we create it in the root.
-	 * We need the root dentry to do this, which is in the super 
+	 * We need the root dentry to do this, which is in the super
 	 * block. A pointer to that is in the struct vfsmount that we
 	 * have around.
 	 */
@@ -330,7 +330,7 @@ static struct dentry *__create_file(const char *name, umode_t mode,
 		switch (mode & S_IFMT) {
 		case S_IFDIR:
 			error = debugfs_mkdir(parent->d_inode, dentry, mode);
-					      
+
 			break;
 		case S_IFLNK:
 			error = debugfs_link(parent->d_inode, dentry, mode,
@@ -534,7 +534,7 @@ EXPORT_SYMBOL_GPL(debugfs_remove);
  */
 void debugfs_remove_recursive(struct dentry *dentry)
 {
-	struct dentry *child, *next, *parent;
+	struct dentry *child, *parent;
 
 	if (IS_ERR_OR_NULL(dentry))
 		return;
@@ -546,30 +546,49 @@ void debugfs_remove_recursive(struct dentry *dentry)
 	parent = dentry;
  down:
 	mutex_lock(&parent->d_inode->i_mutex);
-	list_for_each_entry_safe(child, next, &parent->d_subdirs, d_u.d_child) {
+ loop:
+	/*
+	 * The parent->d_subdirs is protected by the d_lock. Outside that
+	 * lock, the child can be unlinked and set to be freed which can
+	 * use the d_u.d_child as the rcu head and corrupt this list.
+	 */
+	spin_lock(&parent->d_lock);
+	list_for_each_entry(child, &parent->d_subdirs, d_u.d_child) {
 		if (!debugfs_positive(child))
 			continue;
 
 		/* perhaps simple_empty(child) makes more sense */
 		if (!list_empty(&child->d_subdirs)) {
+			spin_unlock(&parent->d_lock);
 			mutex_unlock(&parent->d_inode->i_mutex);
 			parent = child;
 			goto down;
 		}
- up:
+
+		spin_unlock(&parent->d_lock);
+
 		if (!__debugfs_remove(child, parent))
 			simple_release_fs(&debugfs_mount, &debugfs_mount_count);
+
+		/*
+		 * The parent->d_lock protects agaist child from unlinking
+		 * from d_subdirs. When releasing the parent->d_lock we can
+		 * no longer trust that the next pointer is valid.
+		 * Restart the loop. We'll skip this one with the
+		 * debugfs_positive() check.
+		 */
+		goto loop;
 	}
+	spin_unlock(&parent->d_lock);
 
 	mutex_unlock(&parent->d_inode->i_mutex);
 	child = parent;
 	parent = parent->d_parent;
 	mutex_lock(&parent->d_inode->i_mutex);
 
-	if (child != dentry) {
-		next = list_next_entry(child, d_u.d_child);
-		goto up;
-	}
+	if (child != dentry)
+		/* go up */
+		goto loop;
 
 	if (!__debugfs_remove(child, parent))
 		simple_release_fs(&debugfs_mount, &debugfs_mount_count);

fs/kernfs/file.c

@@ -896,7 +896,7 @@ const struct file_operations kernfs_file_fops = {
  * @ops: kernfs operations for the file
  * @priv: private data for the file
  * @ns: optional namespace tag of the file
- * @static_name: don't copy file name
+ * @name_is_static: don't copy file name
  * @key: lockdep key for the file's active_ref, %NULL to disable lockdep
  *
  * Returns the created node on success, ERR_PTR() value on error.

include/drm/drmP.h

@@ -83,6 +83,7 @@ struct drm_device;
 
 struct device_node;
 struct videomode;
+struct reservation_object;
 
 #include <drm/drm_os_linux.h>
 #include <drm/drm_hashtab.h>
@@ -923,6 +924,8 @@ struct drm_driver {
 	/* low-level interface used by drm_gem_prime_{import,export} */
 	int (*gem_prime_pin)(struct drm_gem_object *obj);
 	void (*gem_prime_unpin)(struct drm_gem_object *obj);
+	struct reservation_object * (*gem_prime_res_obj)(
+				struct drm_gem_object *obj);
 	struct sg_table *(*gem_prime_get_sg_table)(struct drm_gem_object *obj);
 	struct drm_gem_object *(*gem_prime_import_sg_table)(
 				struct drm_device *dev, size_t size,

include/linux/component.h

@@ -29,4 +29,11 @@ void component_master_del(struct device *,
 int component_master_add_child(struct master *master,
 	int (*compare)(struct device *, void *), void *compare_data);
 
+struct component_match;
+
+int component_master_add_with_match(struct device *,
+	const struct component_master_ops *, struct component_match *);
+void component_match_add(struct device *, struct component_match **,
+	int (*compare)(struct device *, void *), void *compare_data);
+
 #endif

include/linux/device.h

@@ -631,8 +631,6 @@ extern unsigned long devm_get_free_pages(struct device *dev,
 extern void devm_free_pages(struct device *dev, unsigned long addr);
 
 void __iomem *devm_ioremap_resource(struct device *dev, struct resource *res);
-void __iomem *devm_request_and_ioremap(struct device *dev,
-			struct resource *res);
 
 /* allows to add/remove a custom action to devres stack */
 int devm_add_action(struct device *dev, void (*action)(void *), void *data);

include/linux/dma-buf.h

@@ -30,6 +30,8 @@
 #include <linux/list.h>
 #include <linux/dma-mapping.h>
 #include <linux/fs.h>
+#include <linux/fence.h>
+#include <linux/wait.h>
 
 struct device;
 struct dma_buf;
@@ -115,6 +117,7 @@ struct dma_buf_ops {
  * @exp_name: name of the exporter; useful for debugging.
  * @list_node: node for dma_buf accounting and debugging.
  * @priv: exporter specific private data for this buffer object.
+ * @resv: reservation object linked to this dma-buf
  */
 struct dma_buf {
 	size_t size;
@@ -128,6 +131,17 @@ struct dma_buf {
 	const char *exp_name;
 	struct list_head list_node;
 	void *priv;
+	struct reservation_object *resv;
+
+	/* poll support */
+	wait_queue_head_t poll;
+
+	struct dma_buf_poll_cb_t {
+		struct fence_cb cb;
+		wait_queue_head_t *poll;
+
+		unsigned long active;
+	} cb_excl, cb_shared;
 };
 
 /**
@@ -168,10 +182,11 @@ void dma_buf_detach(struct dma_buf *dmabuf,
 				struct dma_buf_attachment *dmabuf_attach);
 
 struct dma_buf *dma_buf_export_named(void *priv, const struct dma_buf_ops *ops,
-			       size_t size, int flags, const char *);
+			       size_t size, int flags, const char *,
+			       struct reservation_object *);
 
-#define dma_buf_export(priv, ops, size, flags)	\
-	dma_buf_export_named(priv, ops, size, flags, KBUILD_MODNAME)
+#define dma_buf_export(priv, ops, size, flags, resv)	\
+	dma_buf_export_named(priv, ops, size, flags, KBUILD_MODNAME, resv)
 
 int dma_buf_fd(struct dma_buf *dmabuf, int flags);
 struct dma_buf *dma_buf_get(int fd);

include/linux/firmware.h

@@ -45,6 +45,8 @@ int request_firmware_nowait(
 	struct module *module, bool uevent,
 	const char *name, struct device *device, gfp_t gfp, void *context,
 	void (*cont)(const struct firmware *fw, void *context));
+int request_firmware_direct(const struct firmware **fw, const char *name,
+			    struct device *device);
 
 void release_firmware(const struct firmware *fw);
 #else
@@ -66,13 +68,12 @@ static inline void release_firmware(const struct firmware *fw)
 {
 }
 
-#endif
+static inline int request_firmware_direct(const struct firmware **fw,
+					  const char *name,
+					  struct device *device)
+{
+	return -EINVAL;
+}
 
-#ifdef CONFIG_FW_LOADER_USER_HELPER
-int request_firmware_direct(const struct firmware **fw, const char *name,
-			    struct device *device);
-#else
-#define request_firmware_direct	request_firmware
 #endif
-
 #endif

include/linux/platform_device.h

@@ -28,6 +28,7 @@ struct platform_device {
 	struct resource	*resource;
 
 	const struct platform_device_id	*id_entry;
+	char *driver_override; /* Driver name to force a match */
 
 	/* MFD cell pointer */
 	struct mfd_cell *mfd_cell;

lib/Kconfig.debug

@@ -1635,6 +1635,19 @@ config TEST_BPF
 
 	  If unsure, say N.
 
+config TEST_FIRMWARE
+	tristate "Test firmware loading via userspace interface"
+	default n
+	depends on FW_LOADER
+	help
+	  This builds the "test_firmware" module that creates a userspace
+	  interface for testing firmware loading. This can be used to
+	  control the triggering of firmware loading without needing an
+	  actual firmware-using device. The contents can be rechecked by
+	  userspace.
+
+	  If unsure, say N.
+
 source "samples/Kconfig"
 
 source "lib/Kconfig.kgdb"

lib/Makefile

@@ -34,6 +34,7 @@ obj-$(CONFIG_TEST_KSTRTOX) += test-kstrtox.o
 obj-$(CONFIG_TEST_MODULE) += test_module.o
 obj-$(CONFIG_TEST_USER_COPY) += test_user_copy.o
 obj-$(CONFIG_TEST_BPF) += test_bpf.o
+obj-$(CONFIG_TEST_FIRMWARE) += test_firmware.o
 
 ifeq ($(CONFIG_DEBUG_KOBJECT),y)
 CFLAGS_kobject.o += -DDEBUG

tools/testing/selftests/Makefile

@@ -11,6 +11,7 @@ TARGETS += vm
 TARGETS += powerpc
 TARGETS += user
 TARGETS += sysctl
+TARGETS += firmware
 
 TARGETS_HOTPLUG = cpu-hotplug
 TARGETS_HOTPLUG += memory-hotplug