- 09 Nov, 2016 16 commits
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Sebastian Andrzej Siewior authored
Install the callbacks via the state machine and let the core invoke the callbacks on the already online CPUs. Signed-off-by:
Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: Tony Luck <tony.luck@intel.com> Cc: linux-ia64@vger.kernel.org Cc: kbuild test robot <lkp@intel.com> Cc: rt@linutronix.de Cc: kbuild-all@01.org Link: http://lkml.kernel.org/r/20161103173128.xuulg4nius46dng5@linutronix.deSigned-off-by:
Thomas Gleixner <tglx@linutronix.de>
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Sebastian Andrzej Siewior authored
Install the callbacks via the state machine and let the core invoke the callbacks on the already online CPUs. The removal of the files happens now in the prepare down stage as there is no reason to keep them around until the cpu has actually died. Signed-off-by:
Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: Tony Luck <tony.luck@intel.com> Cc: linux-ia64@vger.kernel.org Cc: rt@linutronix.de Link: http://lkml.kernel.org/r/20161103145021.28528-16-bigeasy@linutronix.deSigned-off-by:
Thomas Gleixner <tglx@linutronix.de>
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Sebastian Andrzej Siewior authored
Install the callbacks via the state machine and let the core invoke the callbacks on the already online CPUs. The removal of the files happens now in the prepare down stage as there is no reason to keep them around until the cpu has actually died. Signed-off-by:
Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: Tony Luck <tony.luck@intel.com> Cc: linux-ia64@vger.kernel.org Cc: rt@linutronix.de Link: http://lkml.kernel.org/r/20161103145021.28528-15-bigeasy@linutronix.deSigned-off-by:
Thomas Gleixner <tglx@linutronix.de>
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Sebastian Andrzej Siewior authored
Install the callbacks via the state machine and let the core invoke the callbacks on the already online CPUs. No functional change Signed-off-by:
Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: rt@linutronix.de Link: http://lkml.kernel.org/r/20161103145021.28528-14-bigeasy@linutronix.deSigned-off-by:
Thomas Gleixner <tglx@linutronix.de>
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Sebastian Andrzej Siewior authored
Install the callbacks via the state machine and let the core invoke the callbacks on the already online CPUs. No functional change. Signed-off-by:
Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: rt@linutronix.de Link: http://lkml.kernel.org/r/20161103145021.28528-13-bigeasy@linutronix.deSigned-off-by:
Thomas Gleixner <tglx@linutronix.de>
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Sebastian Andrzej Siewior authored
cpuhp_setup_state() invokes the startup callback on all online cpus with the proper protection, so we can remove the cpu hotplug protection from the init function and the creation of the per cpu files for online cpus in smp_add_present_cpu(). smp_add_present_cpu() is called also called from __smp_rescan_cpus(), but this callpath never adds an online cpu, it merily adds newly present cpus, so the creation of the cpu files is not required. Signed-off-by:
Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Acked-by:
Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: linux-s390@vger.kernel.org Cc: rt@linutronix.de Link: http://lkml.kernel.org/r/20161104144502.7kd4bxz2rxqvtack@linutronix.deSigned-off-by:
Thomas Gleixner <tglx@linutronix.de>
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Thomas Gleixner authored
There is no reason to remove the sysfs cpu files when the CPU is dead, they can be removed when the cpu is prepared to go down. Doing it at DOWN_PREPARE allows us to convert it to a symetric hotplug state in the next step. Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Signed-off-by:
Sebastian Andrzej Siewior <bigeasy@linutronix.de> Acked-by:
Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: linux-s390@vger.kernel.org Cc: rt@linutronix.de Link: http://lkml.kernel.org/r/20161104144140.lcee6kwmwlx37m7g@linutronix.deSigned-off-by:
Thomas Gleixner <tglx@linutronix.de>
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Sebastian Andrzej Siewior authored
Install the callbacks via the state machine. Use multi state support to avoid custom list handling for the multiple instances. Signed-off-by:
Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Cc: Steffen Klassert <steffen.klassert@secunet.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: netdev@vger.kernel.org Cc: rt@linutronix.de Cc: "David S. Miller" <davem@davemloft.net> Link: http://lkml.kernel.org/r/20161103145021.28528-10-bigeasy@linutronix.deSigned-off-by:
Thomas Gleixner <tglx@linutronix.de>
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Sebastian Andrzej Siewior authored
Install the callbacks via the state machine. Signed-off-by:
Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Cc: netdev@vger.kernel.org Cc: "David S. Miller" <davem@davemloft.net> Cc: rt@linutronix.de Link: http://lkml.kernel.org/r/20161103145021.28528-9-bigeasy@linutronix.deSigned-off-by:
Thomas Gleixner <tglx@linutronix.de>
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Sebastian Andrzej Siewior authored
Install the callbacks via the state machine. Signed-off-by:
Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Cc: linux-mm@kvack.org Cc: rt@linutronix.de Link: http://lkml.kernel.org/r/20161103145021.28528-8-bigeasy@linutronix.deSigned-off-by:
Thomas Gleixner <tglx@linutronix.de>
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Sebastian Andrzej Siewior authored
Install the callbacks via the state machine. Signed-off-by:
Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Cc: linux-mm@kvack.org Cc: rt@linutronix.de Link: http://lkml.kernel.org/r/20161103145021.28528-7-bigeasy@linutronix.deSigned-off-by:
Thomas Gleixner <tglx@linutronix.de>
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Sebastian Andrzej Siewior authored
Install the callbacks via the state machine. Signed-off-by:
Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: rt@linutronix.de Link: http://lkml.kernel.org/r/20161103145021.28528-6-bigeasy@linutronix.deSigned-off-by:
Thomas Gleixner <tglx@linutronix.de>
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Sebastian Andrzej Siewior authored
Install the callbacks via the state machine and let the core invoke the callbacks on the already online CPUs. Signed-off-by:
Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Cc: rt@linutronix.de Link: http://lkml.kernel.org/r/20161103145021.28528-5-bigeasy@linutronix.deSigned-off-by:
Thomas Gleixner <tglx@linutronix.de>
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Sebastian Andrzej Siewior authored
Install the callbacks via the state machine. Signed-off-by:
Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Cc: Michal Hocko <mhocko@kernel.org> Cc: linux-mm@kvack.org Cc: rt@linutronix.de Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: cgroups@vger.kernel.org Link: http://lkml.kernel.org/r/20161103145021.28528-4-bigeasy@linutronix.deSigned-off-by:
Thomas Gleixner <tglx@linutronix.de>
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Sebastian Andrzej Siewior authored
Install the callbacks via the state machine. Signed-off-by:
Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: rt@linutronix.de Link: http://lkml.kernel.org/r/20161103145021.28528-3-bigeasy@linutronix.deSigned-off-by:
Thomas Gleixner <tglx@linutronix.de>
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Sebastian Andrzej Siewior authored
Install the callbacks via the state machine. Signed-off-by:
Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Cc: linux-fsdevel@vger.kernel.org Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: rt@linutronix.de Link: http://lkml.kernel.org/r/20161103145021.28528-2-bigeasy@linutronix.deSigned-off-by:
Thomas Gleixner <tglx@linutronix.de>
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- 05 Nov, 2016 15 commits
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Linus Torvalds authored
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git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linuxLinus Torvalds authored
Pull i2c fix from Wolfram Sang: "A bugfix for the I2C core fixing a (rare) race condition" * 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: i2c: core: fix NULL pointer dereference under race condition
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Linus Torvalds authored
Merge branches 'sched-urgent-for-linus' and 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull stack vmap fixups from Thomas Gleixner: "Two small patches related to sched_show_task(): - make sure to hold a reference on the task stack while accessing it - remove the thread_saved_pc printout .. and add a sanity check into release_task_stack() to catch problems with task stack references" * 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: sched/core: Remove pointless printout in sched_show_task() sched/core: Fix oops in sched_show_task() * 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: fork: Add task stack refcounting sanity check and prevent premature task stack freeing
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git://git.kernel.org/pub/scm/linux/kernel/git/shli/mdLinus Torvalds authored
Pull MD fixes from Shaohua Li: "There are several bug fixes queued: - fix raid5-cache recovery bugs - fix discard IO error handling for raid1/10 - fix array sync writes bogus position to superblock - fix IO error handling for raid array with external metadata" * tag 'md/4.9-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md: md: be careful not lot leak internal curr_resync value into metadata. -- (all) raid1: handle read error also in readonly mode raid5-cache: correct condition for empty metadata write md: report 'write_pending' state when array in sync md/raid5: write an empty meta-block when creating log super-block md/raid5: initialize next_checkpoint field before use RAID10: ignore discard error RAID1: ignore discard error
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git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsiLinus Torvalds authored
Pull SCSI fixes from James Bottomley: "Two more important data integrity fixes related to RAID device drivers which wrongly throw away the SYNCHRONIZE CACHE command in the non-RAID path and a memory leak in the scsi_debug driver" * tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: scsi: arcmsr: Send SYNCHRONIZE_CACHE command to firmware scsi: scsi_debug: Fix memory leak if LBP enabled and module is unloaded scsi: megaraid_sas: Fix data integrity failure for JBOD (passthrough) devices
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git://git.kernel.org/pub/scm/linux/kernel/git/dtor/inputLinus Torvalds authored
Pull input subsystem updates from Dmitry Torokhov. * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: Input: psmouse - cleanup Focaltech code Input: i8042 - add XMG C504 to keyboard reset table
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git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394Linus Torvalds authored
Pull FireWire (IEEE 1394) fixes from Stefan Richter: - add missing input validation to the firewire-net driver. Invalid IP-over-1394 encapsulation headers could trigger buffer overflows (CVE 2016-8633). - IP-over-1394 link fragmentation headers were read and written incorrectly, breaking fragmented RX/TX with other OS's stacks. * tag 'firewire-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394: firewire: net: fix fragmented datagram_size off-by-one firewire: net: guard against rx buffer overflows
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git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-mediaLinus Torvalds authored
Pull media fixes from Mauro Carvalho Chehab: "A series of fixup patches meant to fix the usage of DMA on stack, plus one warning fixup" * tag 'media/v4.9-3' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (32 commits) [media] radio-bcm2048: don't ignore errors [media] pctv452e: fix semicolon.cocci warnings [media] flexcop-usb: don't use stack for DMA [media] stk-webcam: don't use stack for DMA [media] s2255drv: don't use stack for DMA [media] cpia2_usb: don't use stack for DMA [media] digitv: handle error code on RC query [media] dw2102: return error if su3000_power_ctrl() fails [media] nova-t-usb2: handle error code on RC query [media] technisat-usb2: use DMA buffers for I2C transfers [media] pctv452e: don't call BUG_ON() on non-fatal error [media] pctv452e: don't do DMA on stack [media] nova-t-usb2: don't do DMA on stack [media] gp8psk: don't go past the buffer size [media] gp8psk: don't do DMA on stack [media] dtv5100: don't do DMA on stack [media] dtt200u: handle USB control message errors [media] dtt200u: don't do DMA on stack [media] dtt200u-fe: handle errors on USB control messages [media] dtt200u-fe: don't do DMA on stack ...
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git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pciLinus Torvalds authored
Pull PCI fixes from Bjorn Helgaas: - fix for a Qualcomm driver issue that causes a use-before-set crash - fix for DesignWare iATU unroll support that causes external aborts when enabling the host bridge * tag 'pci-v4.9-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: PCI: designware: Check for iATU unroll support after initializing host PCI: qcom: Fix pp->dev usage before assignment
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git://git.infradead.org/linux-mtdLinus Torvalds authored
Pull MTD fixes from Brian Norris: - MAINTAINERS updates to reflect some new maintainers/submaintainers. We have some great volunteers who've been developing and reviewing already. We're going to try a group maintainership model, so eventually you'll probably see pull requests from people besides me. - NAND fixes from Boris: "Three simple fixes: - fix a non-critical bug in the gpmi driver - fix a bug in the 'automatic NAND timings selection' feature introduced in 4.9-rc1 - fix a false positive uninitialized-var warning" * tag 'for-linus-20161104' of git://git.infradead.org/linux-mtd: mtd: mtk: avoid warning in mtk_ecc_encode mtd: nand: Fix data interface configuration logic mtd: nand: gpmi: disable the clocks on errors MAINTAINERS: add more people to the MTD maintainer team MAINTAINERS: add a maintainer for the SPI NOR subsystem
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git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmcLinus Torvalds authored
Pull MMC fixes from Ulf Hansson: "MMC host: - sdhci-msm: Fix error path in probe - dw_mmc-pltfm: Avoid NULL pointer dereference" * tag 'mmc-v4.9-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc: mmc: sdhci-msm: Fix error return code in sdhci_msm_probe() mmc: dw_mmc-pltfm: fix the potential NULL pointer dereference
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git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpioLinus Torvalds authored
Pull GPIO fixes from Linus Walleij: "Some GPIO fixes for the v4.9 series: - Fix a nasty file descriptor leak when getting line handles. - A fix for a cleanup that seemed innocent but created a problem for drivers instantiating several gpiochips for one single OF node. - Fix a unpredictable problem using irq_domain_simple() in the mvebu driver by converting it to a lineas irqdomain" * tag 'gpio-v4.9-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: gpio/mvebu: Use irq_domain_add_linear gpio: of: fix GPIO drivers with multiple gpio_chip for a single node gpio: GPIO_GET_LINE{HANDLE,EVENT}_IOCTL: Fix file descriptor leak
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git://linux-nfs.org/~bfields/linuxLinus Torvalds authored
Pull nfsd bugfixes from Bruce Fields: "Fixes for some recent regressions including fallout from the vmalloc'd stack change (after which we can no longer encrypt stuff on the stack)" * tag 'nfsd-4.9-1' of git://linux-nfs.org/~bfields/linux: nfsd: Fix general protection fault in release_lock_stateid() svcrdma: backchannel cannot share a page for send and rcv buffers sunrpc: fix some missing rq_rbuffer assignments sunrpc: don't pass on-stack memory to sg_set_buf nfsd: move blocked lock handling under a dedicated spinlock
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git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linuxLinus Torvalds authored
Pull btrfs fixes from Chris Mason: "Some fixes that Dave Sterba collected. We held off on these last week because I was focused on the memory corruption testing" * 'for-4.9-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux: btrfs: fix WARNING in btrfs_select_ref_head() Btrfs: remove some no-op casts btrfs: pass correct args to btrfs_async_run_delayed_refs() btrfs: make file clone aware of fatal signals btrfs: qgroup: Prevent qgroup->reserved from going subzero Btrfs: kill BUG_ON in do_relocation
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git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfsLinus Torvalds authored
Pull overlayfs fixes from Miklos Szeredi: "Fix two more POSIX ACL bugs introduced in 4.8 and add a missing fsync during copy up to prevent possible data loss" * 'overlayfs-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs: ovl: fsync after copy-up ovl: fix get_acl() on tmpfs ovl: update S_ISGID when setting posix ACLs
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- 04 Nov, 2016 9 commits
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git://people.freedesktop.org/~airlied/linuxLinus Torvalds authored
Pull drm fixes from Dave Airlie: "Fixes for amdgpu, radeon, intel, imx and virtio-gpu. This is a bit larger than I'd like, but I had some stuff I meant to send for -rc3 but was waiting for the PAT regression fix to land. So this is really fixes for rc3 and rc4 in one go. There are a set of fixes for an oops we've been seeing around MST display unplug, along with more suspend/resume and shutdown fixes for amdgpu, one power management follow on fix for nouveau, and set of imx fixes, and a single virtio-gpu regression fix" * tag 'drm-fixes-for-v4.9-rc4' of git://people.freedesktop.org/~airlied/linux: (54 commits) virtio-gpu: fix vblank events drm/nouveau/acpi: fix check for power resources support drm/i915: Fix SKL+ 90/270 degree rotated plane coordinate computation drm/i915: Remove two invalid warns drm/i915: Rotated view does not need a fence drm/i915/fbc: fix CFB size calculation for gen8+ drm: i915: Wait for fences on new fb, not old drm/i915: Clean up DDI DDC/AUX CH sanitation drm/i915: Respect alternate_aux_channel for all DDI ports drm/i915/gen9: fix watermarks when using the pipe scaler drm/i915: Fix mismatched INIT power domain disabling during suspend drm/i915: fix a read size argument drm/i915: Use fence_write() from rpm resume drm/i915/gen9: fix DDB partitioning for multi-screen cases drm/i915: workaround sparse warning on variable length arrays drm/i915: keep declarations in i915_drv.h drm/amd/powerplay: fix bug get wrong evv voltage of Polaris. drm/amdgpu/si_dpm: workaround for SI kickers drm/radeon/si_dpm: workaround for SI kickers drm/amdgpu: fix s3 resume back, uvd dpm randomly can't disable. ...
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Niklas Cassel authored
dw_pcie_iatu_unroll_enabled() reads a dbi_base register. Reading any dbi_base register before pp->ops->host_init has been called causes "imprecise external abort" on platforms like ARTPEC-6, where the PCIe module is disabled at boot and first enabled in pp->ops->host_init. Move dw_pcie_iatu_unroll_enabled() to dw_pcie_setup_rc(), since it is after pp->ops->host_init, but before pp->iatu_unroll_enabled is actually used. Fixes: a0601a47 ("PCI: designware: Add iATU Unroll feature") Tested-by:
James Le Cuirot <chewi@gentoo.org> Signed-off-by:
Niklas Cassel <niklas.cassel@axis.com> Signed-off-by:
Bjorn Helgaas <bhelgaas@google.com> Acked-by:
Joao Pinto <jpinto@synopsys.com> Acked-by:
Olof Johansson <olof@lixom.net>
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git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds authored
Pull KVM updates from Paolo Bonzini: "One NULL pointer dereference, and two fixes for regressions introduced during the merge window. The rest are fixes for MIPS, s390 and nested VMX" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: kvm: x86: Check memopp before dereference (CVE-2016-8630) kvm: nVMX: VMCLEAR an active shadow VMCS after last use KVM: x86: drop TSC offsetting kvm_x86_ops to fix KVM_GET/SET_CLOCK KVM: x86: fix wbinvd_dirty_mask use-after-free kvm/x86: Show WRMSR data is in hex kvm: nVMX: Fix kernel panics induced by illegal INVEPT/INVVPID types KVM: document lock orders KVM: fix OOPS on flush_work KVM: s390: Fix STHYI buffer alignment for diag224 KVM: MIPS: Precalculate MMIO load resume PC KVM: MIPS: Make ERET handle ERL before EXL KVM: MIPS: Fix lazy user ASID regenerate for SMP
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git://git.linux-mips.org/pub/scm/ralf/upstream-linusLinus Torvalds authored
Pull MIPS fixes from Ralf Baechle: "A set of MIPS fixes for 4.9: - lots of fixes for printk continuations - six fixes for FP related code. - fix max_low_pfn with disabled highmem - fix KASLR handling of NULL FDT and KASLR for generic kernels - fix build of compressed image - provide default mips_cpc_default_phys_base to ignore CPC - fix reboot on Malta" * 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: MIPS: Fix max_low_pfn with disabled highmem MIPS: Correct MIPS I FP sigcontext layout MIPS: Fix ISA I/II FP signal context offsets MIPS: Remove FIR from ISA I FP signal context MIPS: Fix ISA I FP sigcontext access violation handling MIPS: Fix FCSR Cause bit handling for correct SIGFPE issue MIPS: ptrace: Also initialize the FP context on individual FCSR writes MIPS: dump_tlb: Fix printk continuations MIPS: Fix __show_regs() output MIPS: traps: Fix output of show_code MIPS: traps: Fix output of show_stacktrace MIPS: traps: Fix output of show_backtrace MIPS: Fix build of compressed image MIPS: generic: Fix KASLR for generic kernel. MIPS: KASLR: Fix handling of NULL FDT MIPS: Malta: Fixup reboot MIPS: CPC: Provide default mips_cpc_default_phys_base to ignore CPC
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git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linuxLinus Torvalds authored
Pull parisc updates from Helge Deller: "The first three patches are trivial and add some required KERN_CONT, ignore the new pkey syscalls on parisc and use the LINUX_GATEWAY_ADDR define instead of hardcoded values. The two patches from Dave Anglin are important. The first one avoids trashing the sr2 and sr3 space registers in the Light-weight syscall path. Especially the usage of sr3 is critical since it may get trashed by the interrupt handler. The second patch is even more important and tagged for stable series. It protects one critical section in the syscall entry path by disabling local interrupts. Without disabling interrupts, the sr7 space register may not be in sync with the current stack setup and thus an incoming hardware interrupt may destroy memory in random userspace areas" * 'parisc-4.9-3' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux: parisc: Ignore the pkey system calls for now parisc: Use LINUX_GATEWAY_ADDR define instead of hardcoded value parisc: Ensure consistent state when switching to kernel stack at syscall entry parisc: Avoid trashing sr2 and sr3 in LWS code parisc: use KERN_CONT when printing device inventory
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Vladimir Zapolskiy authored
Race condition between registering an I2C device driver and deregistering an I2C adapter device which is assumed to manage that I2C device may lead to a NULL pointer dereference due to the uninitialized list head of driver clients. The root cause of the issue is that the I2C bus may know about the registered device driver and thus it is matched by bus_for_each_drv(), but the list of clients is not initialized and commonly it is NULL, because I2C device drivers define struct i2c_driver as static and clients field is expected to be initialized by I2C core: i2c_register_driver() i2c_del_adapter() driver_register() ... bus_add_driver() ... ... bus_for_each_drv(..., __process_removed_adapter) ... i2c_do_del_adapter() ... list_for_each_entry_safe(..., &driver->clients, ...) INIT_LIST_HEAD(&driver->clients); To solve the problem it is sufficient to do clients list head initialization before calling driver_register(). The problem was found while using an I2C device driver with a sluggish registration routine on a bus provided by a physically detachable I2C master controller, but practically the oops may be reproduced under the race between arbitraty I2C device driver registration and managing I2C bus device removal e.g. by unbinding the latter over sysfs: % echo 21a4000.i2c > /sys/bus/platform/drivers/imx-i2c/unbind Unable to handle kernel NULL pointer dereference at virtual address 00000000 Internal error: Oops: 17 [#1] SMP ARM CPU: 2 PID: 533 Comm: sh Not tainted 4.9.0-rc3+ #61 Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree) task: e5ada400 task.stack: e4936000 PC is at i2c_do_del_adapter+0x20/0xcc LR is at __process_removed_adapter+0x14/0x1c Flags: NzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none Control: 10c5387d Table: 35bd004a DAC: 00000051 Process sh (pid: 533, stack limit = 0xe4936210) Stack: (0xe4937d28 to 0xe4938000) Backtrace: [<c0667be0>] (i2c_do_del_adapter) from [<c0667cc0>] (__process_removed_adapter+0x14/0x1c) [<c0667cac>] (__process_removed_adapter) from [<c0516998>] (bus_for_each_drv+0x6c/0xa0) [<c051692c>] (bus_for_each_drv) from [<c06685ec>] (i2c_del_adapter+0xbc/0x284) [<c0668530>] (i2c_del_adapter) from [<bf0110ec>] (i2c_imx_remove+0x44/0x164 [i2c_imx]) [<bf0110a8>] (i2c_imx_remove [i2c_imx]) from [<c051a838>] (platform_drv_remove+0x2c/0x44) [<c051a80c>] (platform_drv_remove) from [<c05183d8>] (__device_release_driver+0x90/0x12c) [<c0518348>] (__device_release_driver) from [<c051849c>] (device_release_driver+0x28/0x34) [<c0518474>] (device_release_driver) from [<c0517150>] (unbind_store+0x80/0x104) [<c05170d0>] (unbind_store) from [<c0516520>] (drv_attr_store+0x28/0x34) [<c05164f8>] (drv_attr_store) from [<c0298acc>] (sysfs_kf_write+0x50/0x54) [<c0298a7c>] (sysfs_kf_write) from [<c029801c>] (kernfs_fop_write+0x100/0x214) [<c0297f1c>] (kernfs_fop_write) from [<c0220130>] (__vfs_write+0x34/0x120) [<c02200fc>] (__vfs_write) from [<c0221088>] (vfs_write+0xa8/0x170) [<c0220fe0>] (vfs_write) from [<c0221e74>] (SyS_write+0x4c/0xa8) [<c0221e28>] (SyS_write) from [<c0108a20>] (ret_fast_syscall+0x0/0x1c) Signed-off-by:
Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com> Signed-off-by:
Wolfram Sang <wsa@the-dreams.de> Cc: stable@kernel.org
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James Hogan authored
When low memory doesn't reach HIGHMEM_START (e.g. up to 256MB at PA=0 is common) and highmem is present above HIGHMEM_START (e.g. on Malta the RAM overlayed by the IO region is aliased at PA=0x90000000), max_low_pfn will be initially calculated very large and then clipped down to HIGHMEM_START. This causes crashes when reading /sys/kernel/mm/page_idle/bitmap (i.e. CONFIG_IDLE_PAGE_TRACKING=y) when highmem is disabled. pfn_valid() will compare against max_mapnr which is derived from max_low_pfn when there is no highend_pfn set up, and will return true for PFNs right up to HIGHMEM_START, even though they are beyond the end of low memory and no page structs will actually exist for these PFNs. This is fixed by skipping high memory regions when initially calculating max_low_pfn if highmem is disabled, so it doesn't get clipped too high. We also clip regions which overlap the highmem boundary when highmem is disabled, so that max_pfn doesn't extend into highmem either. Signed-off-by:
James Hogan <james.hogan@imgtec.com> Cc: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/14490/Signed-off-by:
Ralf Baechle <ralf@linux-mips.org>
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Maciej W. Rozycki authored
Complement commit 80cbfad7 ("MIPS: Correct MIPS I FP context layout") and correct the way Floating Point General registers are stored in a signal context with MIPS I hardware. Use the S.D and L.D assembly macros to have pairs of SWC1 instructions and pairs of LWC1 instructions produced, respectively, in an arrangement which makes the memory representation of floating-point data passed compatible with that used by hardware SDC1 and LDC1 instructions, where available, regardless of the hardware endianness used. This matches the layout used by r4k_fpu.S, ensuring run-time compatibility for MIPS I software across all o32 hardware platforms. Define an EX2 macro to handle exceptions from both hardware instructions implicitly produced from S.D and L.D assembly macros. Signed-off-by:
Maciej W. Rozycki <macro@imgtec.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/14477/Signed-off-by:
Ralf Baechle <ralf@linux-mips.org>
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Maciej W. Rozycki authored
Fix a regression introduced with commit 2db9ca0a ("MIPS: Use struct mips_abi offsets to save FP context") for MIPS I/I FP signal contexts, by converting save/restore code to the updated internal API. Start FGR offsets from 0 rather than SC_FPREGS from $a0 and use $a1 rather than the offset of SC_FPC_CSR from $a0 for the Floating Point Control/Status Register (FCSR). Document the new internal API and adjust assembly code formatting for consistency. Signed-off-by:
Maciej W. Rozycki <macro@imgtec.com> Cc: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/14476/Signed-off-by:
Ralf Baechle <ralf@linux-mips.org>
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