- 28 May, 2014 13 commits
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Preeti U Murthy authored
Commit 32e45ff4 changed the default value of RECLAIM_DISTANCE to 30. However the comment around arch specifc definition of RECLAIM_DISTANCE is not updated to reflect the same. Correct the value mentioned in the comment. Signed-off-by:
Preeti U Murthy <preeti@linux.vnet.ibm.com> Cc: Anton Blanchard <anton@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Acked-by:
KOSAKI Motohiro <Kosaki.motohiro@jp.fujitsu.com> Signed-off-by:
Benjamin Herrenschmidt <benh@kernel.crashing.org>
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Michael Ellerman authored
Upcoming POWER8 chips support a concept called split core. This is where the core can be split into subcores that although not full cores, are able to appear as full cores to a guest. The splitting & unsplitting procedure is mildly complicated, and explained at length in the comments within the patch. One notable detail is that when splitting or unsplitting we need to pull offline cpus out of their offline state to do work as part of the procedure. The interface for changing the split mode is via a sysfs file, eg: $ echo 2 > /sys/devices/system/cpu/subcores_per_core Currently supported values are '1', '2' and '4'. And indicate respectively that the core should be unsplit, split in half, and split in quarters. These modes correspond to threads_per_subcore of 8, 4 and 2. We do not allow changing the split mode while KVM VMs are active. This is to prevent the value changing while userspace is configuring the VM, and also to prevent the mode being changed in such a way that existing guests are unable to be run. CPU hotplug fixes by Srivatsa. max_cpus fixes by Mahesh. cpuset fixes by benh. Fix for irq race by paulus. The rest by mikey and mpe. Signed-off-by:
Michael Ellerman <mpe@ellerman.id.au> Signed-off-by:
Michael Neuling <mikey@neuling.org> Signed-off-by:
Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com> Signed-off-by:
Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by:
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Michael Ellerman authored
To support split core on POWER8 we need to modify various parts of the KVM code to use threads_per_subcore instead of threads_per_core. On systems that do not support split core threads_per_subcore == threads_per_core and these changes are a nop. We use threads_per_subcore as the value reported by KVM_CAP_PPC_SMT. This communicates to userspace that guests can only be created with a value of threads_per_core that is less than or equal to the current threads_per_subcore. This ensures that guests can only be created with a thread configuration that we are able to run given the current split core mode. Although threads_per_subcore can change during the life of the system, the commit that enables that will ensure that threads_per_subcore does not change during the life of a KVM VM. Signed-off-by:
Alexander Graf <agraf@suse.de> Acked-by:
Paul Mackerras <paulus@samba.org> Signed-off-by:
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Michael Ellerman authored
To support split core we need to change the check in __cpu_up() that determines if a cpu is allowed to come online. Currently we refuse to online cpus which are not the primary thread within their core. On POWER8 with split core support this check needs to instead refuse to online cpus which are not the primary thread within their *sub* core. On POWER7 and other systems that do not support split core, threads_per_subcore == threads_per_core and so the check is equivalent. Signed-off-by:
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Michael Ellerman authored
On POWER8 we have a new concept of a subcore. This is what happens when you take a regular core and split it. A subcore is a grouping of two or four SMT threads, as well as a handfull of SPRs which allows the subcore to appear as if it were a core from the point of view of a guest. Unlike threads_per_core which is fixed at boot, threads_per_subcore can change while the system is running. Most code will not want to use threads_per_subcore. Signed-off-by:
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Michael Ellerman authored
To support split core we need to be able to force all secondaries into nap, so the core can detect they are idle and do an unsplit. Currently power7_nap() will return without napping if there is an irq pending. We want to ignore the pending irq and nap anyway, we will deal with the interrupt later. Signed-off-by:
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Michael Ellerman authored
As part of the support for split core on POWER8, we want to be able to block splitting of the core while KVM VMs are active. The logic to do that would be exactly the same as the code we currently have for inhibiting onlining of secondaries. Instead of adding an identical mechanism to block split core, rework the secondary inhibit code to be a "HV KVM is active" check. We can then use that in both the cpu hotplug code and the upcoming split core code. Signed-off-by:
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Nishanth Aravamudan authored
Based off fd1197f1 for ia64, enable CONFIG_HAVE_MEMORYLESS_NODES if NUMA. Initialize the local memory node in start_secondary. With this commit and the preceding to enable CONFIG_USER_PERCPU_NUMA_NODE_ID, which is a prerequisite, in a PowerKVM guest with the following topology: numactl --hardware available: 3 nodes (0-2) node 0 cpus: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 node 0 size: 1998 MB node 0 free: 521 MB node 1 cpus: 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 node 1 size: 0 MB node 1 free: 0 MB node 2 cpus: node 2 size: 2039 MB node 2 free: 1739 MB node distances: node 0 1 2 0: 10 40 40 1: 40 10 40 2: 40 40 10 the unreclaimable slab is reduced by close to 130M: Before: Slab: 418176 kB SReclaimable: 26624 kB SUnreclaim: 391552 kB After: Slab: 298944 kB SReclaimable: 31744 kB SUnreclaim: 267200 kB Signed-off-by:
Nishanth Aravamudan <nacc@linux.vnet.ibm.com> Signed-off-by:
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Nishanth Aravamudan authored
Based off 3bccd996 for ia64, convert powerpc to use the generic per-CPU topology tracking, specifically: initialize per cpu numa_node entry in start_secondary remove the powerpc cpu_to_node() define CONFIG_USE_PERCPU_NUMA_NODE_ID if NUMA Signed-off-by:
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Benjamin Herrenschmidt authored
Merge the binutils and kexec fixes.
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Srivatsa S. Bhat authored
If we try to perform a kexec when the machine is in ST (Single-Threaded) mode (ppc64_cpu --smt=off), the kexec operation doesn't succeed properly, and we get the following messages during boot: [ 0.089866] POWER8 performance monitor hardware support registered [ 0.089985] power8-pmu: PMAO restore workaround active. [ 5.095419] Processor 1 is stuck. [ 10.097933] Processor 2 is stuck. [ 15.100480] Processor 3 is stuck. [ 20.102982] Processor 4 is stuck. [ 25.105489] Processor 5 is stuck. [ 30.108005] Processor 6 is stuck. [ 35.110518] Processor 7 is stuck. [ 40.113369] Processor 9 is stuck. [ 45.115879] Processor 10 is stuck. [ 50.118389] Processor 11 is stuck. [ 55.120904] Processor 12 is stuck. [ 60.123425] Processor 13 is stuck. [ 65.125970] Processor 14 is stuck. [ 70.128495] Processor 15 is stuck. [ 75.131316] Processor 17 is stuck. Note that only the sibling threads are stuck, while the primary threads (0, 8, 16 etc) boot just fine. Looking closer at the previous step of kexec, we observe that kexec tries to wakeup (bring online) the sibling threads of all the cores, before performing kexec: [ 9464.131231] Starting new kernel [ 9464.148507] kexec: Waking offline cpu 1. [ 9464.148552] kexec: Waking offline cpu 2. [ 9464.148600] kexec: Waking offline cpu 3. [ 9464.148636] kexec: Waking offline cpu 4. [ 9464.148671] kexec: Waking offline cpu 5. [ 9464.148708] kexec: Waking offline cpu 6. [ 9464.148743] kexec: Waking offline cpu 7. [ 9464.148779] kexec: Waking offline cpu 9. [ 9464.148815] kexec: Waking offline cpu 10. [ 9464.148851] kexec: Waking offline cpu 11. [ 9464.148887] kexec: Waking offline cpu 12. [ 9464.148922] kexec: Waking offline cpu 13. [ 9464.148958] kexec: Waking offline cpu 14. [ 9464.148994] kexec: Waking offline cpu 15. [ 9464.149030] kexec: Waking offline cpu 17. Instrumenting this piece of code revealed that the cpu_up() operation actually fails with -EBUSY. Thus, only the primary threads of all the cores are online during kexec, and hence this is a sure-shot receipe for disaster, as explained in commit e8e5c215 (powerpc/kexec: Fix orphaned offline CPUs across kexec), as well as in the comment above wake_offline_cpus(). It turns out that cpu_up() was returning -EBUSY because the variable 'cpu_hotplug_disabled' was set to 1; and this disabling of CPU hotplug was done by migrate_to_reboot_cpu() inside kernel_kexec(). Now, migrate_to_reboot_cpu() was originally written with the assumption that any further code will not need to perform CPU hotplug, since we are anyway in the reboot path. However, kexec is clearly not such a case, since we depend on onlining CPUs, atleast on powerpc. So re-enable cpu-hotplug after returning from migrate_to_reboot_cpu() in the kexec path, to fix this regression in kexec on powerpc. Also, wrap the cpu_up() in powerpc kexec code within a WARN_ON(), so that we can catch such issues more easily in the future. Fixes: c97102ba (kexec: migrate to reboot cpu) Cc: stable@vger.kernel.org Signed-off-by:
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Guenter Roeck authored
With binutils 2.24, various 64 bit builds fail with relocation errors such as arch/powerpc/kernel/built-in.o: In function `exc_debug_crit_book3e': (.text+0x165ee): relocation truncated to fit: R_PPC64_ADDR16_HI against symbol `interrupt_base_book3e' defined in .text section in arch/powerpc/kernel/built-in.o arch/powerpc/kernel/built-in.o: In function `exc_debug_crit_book3e': (.text+0x16602): relocation truncated to fit: R_PPC64_ADDR16_HI against symbol `interrupt_end_book3e' defined in .text section in arch/powerpc/kernel/built-in.o The assembler maintainer says: I changed the ABI, something that had to be done but unfortunately happens to break the booke kernel code. When building up a 64-bit value with lis, ori, shl, oris, ori or similar sequences, you now should use @high and @higha in place of @h and @ha. @h and @ha (and their associated relocs R_PPC64_ADDR16_HI and R_PPC64_ADDR16_HA) now report overflow if the value is out of 32-bit signed range. ie. @h and @ha assume you're building a 32-bit value. This is needed to report out-of-range -mcmodel=medium toc pointer offsets in @toc@h and @toc@ha expressions, and for consistency I did the same for all other @h and @ha relocs. Replacing @h with @high in one strategic location fixes the relocation errors. This has to be done conditionally since the assembler either supports @h or @high but not both. Cc: <stable@vger.kernel.org> Signed-off-by:
Guenter Roeck <linux@roeck-us.net> Signed-off-by:
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Benjamin Herrenschmidt authored
<< Highlights include a few new boards, a device tree binding for CCF (including backwards-compatible device tree updates to distinguish incompatible versions), and some fixes. >>
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- 22 May, 2014 21 commits
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Scott Wood authored
Signed-off-by:Scott Wood <scottwood@freescale.com> Cc: Diana Craciun <diana.craciun@freescale.com>
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Alexander Graf authored
We get an array of instructions from the hypervisor via device tree that we write into a buffer that gets executed whenever we want to make an ePAPR compliant hypercall. However, the hypervisor passes us these instructions in BE order which we have to manually convert to LE when we want to run them in LE mode. With this fixup in place, I can successfully run LE kernels with KVM PV enabled on PR KVM. Signed-off-by:
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harninder rai authored
- BSC9132 is an integrated device that targets Femto base station market. It combines Power Architecture e500v2 and DSP StarCore SC3850 technologies with MAPLE-B2F baseband acceleration processing elements - BSC9132QDS Overview 2Gbyte DDR3 (on board DDR) 32Mbyte 16bit NOR flash 128Mbyte 2K page size NAND Flash 256 Kbit M24256 I2C EEPROM 128 Mbit SPI Flash memory SD slot eTSEC1: Connected to SGMII PHY eTSEC2: Connected to SGMII PHY DUART interface: supports one UARTs up to 115200 bps for console display Signed-off-by:Harninder Rai <harninder.rai@freescale.com> Signed-off-by:
Ruchika Gupta <ruchika.gupta@freescale.com> Signed-off-by:
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Lijun Pan authored
P1023RDS is no longer supported/manufactured by Freescale while P1023RDB is. Signed-off-by:
Lijun Pan <Lijun.Pan@freescale.com> Signed-off-by:
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Scott Wood authored
Besides other potential problems, if MPIC_NO_RESET is not set, the error interrupt will be masked after it is requested. Signed-off-by: -
Prabhakar Kushwaha authored
Add support for T104x board in board file t104x_qds.c, It is common for both T1040 and T1042 as they share same QDS board. T1040QDS board Overview ----------------------- - SERDES Connections, 8 lanes supporting: — PCI Express: supporting Gen 1 and Gen 2; — SGMII — QSGMII — SATA 2.0 — Aurora debug with dedicated connectors (T1040 only) - DDR Controller - Supports rates of up to 1600 MHz data-rate - Supports one DDR3LP UDIMM/RDIMMs, of single-, dual- or quad-rank types. -IFC/Local Bus - NAND flash: 8-bit, async, up to 2GB. - NOR: 8-bit or 16-bit, non-multiplexed, up to 512MB - GASIC: Simple (minimal) target within Qixis FPGA - PromJET rapid memory download support - Ethernet - Two on-board RGMII 10/100/1G ethernet ports. - PHY #0 remains powered up during deep-sleep (T1040 only) - QIXIS System Logic FPGA - Clocks - System and DDR clock (SYSCLK, “DDRCLK”) - SERDES clocks - Power Supplies - Video - DIU supports video at up to 1280x1024x32bpp - USB - Supports two USB 2.0 ports with integrated PHYs — Two type A ports with 5V@1.5A per port. — Second port can be converted to OTG mini-AB - SDHC - SDHC port connects directly to an adapter card slot, featuring: - Supporting SD slots for: SD, SDHC (1x, 4x, 8x) and/or MMC — Supporting eMMC memory devices - SPI - On-board support of 3 different devices and sizes - Other IO - Two Serial ports - ProfiBus port - Four I2C ports Add T104xQDS support in Kconfig and Makefile. Also create device tree. Following features are currently not implmented. - SerDes: Aurora - IFC: GASIC, Promjet - QIXIS - Ethernet - DIU - power supplies management - ProfiBus Signed-off-by:Priyanka Jain <Priyanka.Jain@freescale.com> Signed-off-by:
Poonam Aggrwal <poonam.aggrwal@freescale.com> Signed-off-by:
Prabhakar Kushwaha <prabhakar@freescale.com> Signed-off-by:
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Prabhakar Kushwaha authored
The QorIQ T1040/T1042 processor support four integrated 64-bit e5500 PA processor cores with high-performance data path acceleration architecture and network peripheral interfaces required for networking & telecommunications. T1042 personality is a reduced personality of T1040 without Integrated 8-port Gigabit Ethernet switch. The T1040/T1042 SoC includes the following function and features: - Four e5500 cores, each with a private 256 KB L2 cache - 256 KB shared L3 CoreNet platform cache (CPC) - Interconnect CoreNet platform - 32-/64-bit DDR3L/DDR4 SDRAM memory controller with ECC and interleaving support - Data Path Acceleration Architecture (DPAA) incorporating acceleration for the following functions: - Packet parsing, classification, and distribution - Queue management for scheduling, packet sequencing, and congestion management - Cryptography Acceleration (SEC 5.0) - RegEx Pattern Matching Acceleration (PME 2.2) - IEEE Std 1588 support - Hardware buffer management for buffer allocation and deallocation - Ethernet interfaces - Integrated 8-port Gigabit Ethernet switch (T1040 only) - Four 1 Gbps Ethernet controllers - Two RGMII interfaces or one RGMII and one MII interfaces - High speed peripheral interfaces - Four PCI Express 2.0 controllers running at up to 5 GHz - Two SATA controllers supporting 1.5 and 3.0 Gb/s operation - Upto two QSGMII interface - Upto six SGMII interface supporting 1000 Mbps - One SGMII interface supporting upto 2500 Mbps - Additional peripheral interfaces - Two USB 2.0 controllers with integrated PHY - SD/eSDHC/eMMC - eSPI controller - Four I2C controllers - Four UARTs - Four GPIO controllers - Integrated flash controller (IFC) - Change this to LCD/ HDMI interface (DIU) with 12 bit dual data rate - TDM interface - Multicore programmable interrupt controller (PIC) - Two 8-channel DMA engines - Single source clocking implementation - Deep Sleep power implementaion (wakeup from GPIO/Timer/Ethernet/USB) Signed-off-by:Varun Sethi <Varun.Sethi@freescale.com> Signed-off-by:
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Diana Craciun authored
Updated the device trees according to the corenet-cf binding definition. Signed-off-by:
Diana Craciun <Diana.Craciun@freescale.com> Signed-off-by:
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Diana Craciun authored
Updated the device trees according to the corenet-cf binding definition. Signed-off-by:
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Diana Craciun authored
The CoreNet coherency fabric is a fabric-oriented, conectivity infrastructure that enables the implementation of coherent, multicore systems. The CCF acts as a central interconnect for cores, platform-level caches, memory subsystem, peripheral devices and I/O host bridges in the system. Signed-off-by:
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Scott Wood authored
This warning can be seen in allyesconfig, and was introduced by commit f9eb581c63b2acce827570e105205c0789360650 "powerpc: fix build of epapr_paravirt on 64-bit book3s". Signed-off-by: -
Scott Wood authored
This fixes an allyesconfig build break introduced by commit 7762b1ed7aaee223230793fcee80672e2e3aa7a8 "powerpc: move epapr paravirt init of power_save to an initcall". Signed-off-by: -
Tang Yuantian authored
Main changs include: - Clarified the clock nodes' version number - Fixed a issue in example Singed-off-by:
Tang Yuantian <Yuantian.Tang@freescale.com> Signed-off-by:
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Stuart Yoder authored
some restructuring of epapr paravirt init resulted in ppc_md.power_save being set, and then overwritten to NULL during machine_init. This patch splits the initialization of ppc_md.power_save out into a postcore init call. Signed-off-by:
Stuart Yoder <stuart.yoder@freescale.com> Signed-off-by:
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Martijn de Gouw authored
OCA4080 overview: - 1.466 GHz Freescale QorIQ P4080E Processor - 4Gbyte DDR3 on board - 8Mbyte Nor flash - Serial RapidIO 1.2 - 1 x 10/100/1000 BASE-T front ethernet - 1 x 1000 BASE-BX ethernet on AMC connector Signed-off-by:
Martijn de Gouw <martijn.de.gouw@prodrive.nl> [scottwood@freescale.com: minor conflict-related changes] Signed-off-by:
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Valentin Longchamp authored
This patch introduces the support for Keymile's kmcoge4 board which is the internal reference design for boards based on Freescale's P2040/P2041 SoCs. This internal reference design is named kmp204x. The peripherals used on this board are: - SPI NOR Flash as bootloader medium - NAND Flash with a ubi partition - 2 PCIe busses (hosts 1 and 3) - 3 FMAN Ethernet devices (FMAN1 DTSEC1/2/5) - 4 Local Bus windows, with one dedicated to the QRIO reset/power mgmt CPLD - 2 I2C busses - last but not least, the mandatory serial port The patch also adds a defconfig file for this reference design that is necessary because of the lowmem option that must be set higher due to the number of PCIe devices with big ioremapped mem ranges on the boad. Signed-off-by:
Valentin Longchamp <valentin.longchamp@keymile.com> Signed-off-by:
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Valentin Longchamp authored
These are the bindings for 2 MFD devices used on some of the Keymile boards. The first one is the chassis managmenet bfticu FPGA. The second one is the board controller (reset, LEDs, GPIOs) QRIO CPDL. These FPGAs are used in the kmcoge4 board. Signed-off-by:
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Valentin Longchamp authored
Even though the company belongs to Microsemi, many chips are still labeled as Zarlink. Among them is the family of network clock generators, the zl3034x. Signed-off-by:
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Wang Dongsheng authored
PCI controller disable PME message report feature, that shouldn't have happened. Fix it and enable PME message report feature. Signed-off-by:
Wang Dongsheng <dongsheng.wang@freescale.com> Signed-off-by:
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Liu Gang authored
There are error parameters should be corrected when calling dma_free_coherent to free rmu rx-ring buffers in fsl_open_inb_mbox() function. Signed-off-by:
Liu Gang <Gang.Liu@freescale.com> Reported-by:
Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by:
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Scott Wood authored
The only way Freescale booke chips support mappings larger than 4K is via TLB1. The only way we support (direct) TLB1 entries is via hugetlb, which is not what map_kernel_page() does when given a large page size. Without this, a kernel with CONFIG_SPARSEMEM_VMEMMAP enabled crashes on boot with messages such as: PID hash table entries: 4096 (order: 3, 32768 bytes) Sorting __ex_table... BUG: Bad page state in process swapper pfn:00a2f page:8000040000023a48 count:0 mapcount:0 mapping:0000040000ffce48 index:0x40000ffbe50 page flags: 0x40000ffda40(active|arch_1|private|private_2|head|tail|swapcache|mappedtodisk|reclaim|swapbacked|unevictable|mlocked) page dumped because: PAGE_FLAGS_CHECK_AT_FREE flag(s) set bad because of flags: page flags: 0x311840(active|private|private_2|swapcache|unevictable|mlocked) Modules linked in: CPU: 0 PID: 0 Comm: swapper Not tainted 3.15.0-rc1-00003-g7fa250c #299 Call Trace: [c00000000098ba20] [c000000000008b3c] .show_stack+0x7c/0x1cc (unreliable) [c00000000098baf0] [c00000000060aa50] .dump_stack+0x88/0xb4 [c00000000098bb70] [c0000000000c0468] .bad_page+0x144/0x1a0 [c00000000098bc10] [c0000000000c0628] .free_pages_prepare+0x164/0x17c [c00000000098bcc0] [c0000000000c24cc] .free_hot_cold_page+0x48/0x214 [c00000000098bd60] [c00000000086c318] .free_all_bootmem+0x1fc/0x354 [c00000000098be70] [c00000000085da84] .mem_init+0xac/0xdc [c00000000098bef0] [c0000000008547b0] .start_kernel+0x21c/0x4d4 [c00000000098bf90] [c000000000000448] .start_here_common+0x20/0x58 Signed-off-by:
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- 20 May, 2014 6 commits
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Rusty Russell authored
A simple patch which was supposed to swap r12 and r11 also inexplicably changed the offset by two bytes. This instruction (to load r2) isn't used in LE, so it wasn't noticed. Fixes: b1ce369e ("powerpc: modules: use r12 for stub jump address.) Reported-by:
Alistair Popple <alistair@popple.id.au> Signed-off-by:
Rusty Russell <rusty@rustcorp.com.au> Tested-by:
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Rickard Strandqvist authored
There is otherwise a risk of a possible null pointer dereference. Was largely found by using a static code analysis program called cppcheck. Signed-off-by:
Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se> Signed-off-by:
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Jeff Bailey authored
powerpc: Clear ELF personality flag if ELFv2 is not requested. The POWER kernel uses a personality flag to determine whether it should be setting up function descriptors or not (per the updated ABI). This flag wasn't being cleared on a new process but instead was being inherited. The visible effect was that an ELFv2 binary could not execve to an ELFv1 binary. Signed-off-by:
Jeff Bailey <jeffbailey@google.com> arch/powerpc/include/asm/elf.h | 2 ++ 1 file changed, 2 insertions(+) Signed-off-by:
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Paul Gortmaker authored
Currently, on 8641D, which doesn't set CONFIG_HAVE_HW_BREAKPOINT we get the following splat: BUG: using smp_processor_id() in preemptible [00000000] code: login/1382 caller is set_breakpoint+0x1c/0xa0 CPU: 0 PID: 1382 Comm: login Not tainted 3.15.0-rc3-00041-g2aafe1a4 #1 Call Trace: [decd5d80] [c0008dc4] show_stack+0x50/0x158 (unreliable) [decd5dc0] [c03c6fa0] dump_stack+0x7c/0xdc [decd5de0] [c01f8818] check_preemption_disabled+0xf4/0x104 [decd5e00] [c00086b8] set_breakpoint+0x1c/0xa0 [decd5e10] [c00d4530] flush_old_exec+0x2bc/0x588 [decd5e40] [c011c468] load_elf_binary+0x2ac/0x1164 [decd5ec0] [c00d35f8] search_binary_handler+0xc4/0x1f8 [decd5ef0] [c00d4ee8] do_execve+0x3d8/0x4b8 [decd5f40] [c001185c] ret_from_syscall+0x0/0x38 --- Exception: c01 at 0xfeee554 LR = 0xfeee7d4 The call path in this case is: flush_thread --> set_debug_reg_defaults --> set_breakpoint --> __get_cpu_var Since preemption is enabled in the cleanup of flush thread, and there is no need to disable it, introduce the distinction between set_breakpoint and __set_breakpoint, leaving only the flush_thread instance as the current user of set_breakpoint. Signed-off-by:
Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by:
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Paul Gortmaker authored
None of the callers check the return value, so it might as well not have one at all. Signed-off-by:
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James Hogan authored
The arch/powerpc/include/asm/linkage.h is being unintentionally exported in the kernel headers since commit e1b5bb6d (consolidate cond_syscall and SYSCALL_ALIAS declarations) when arch/powerpc/include/uapi/asm/linkage.h was deleted but the header-y not removed from the Kbuild file. This happens because Makefile.headersinst still checks the old asm/ directory if the specified header doesn't exist in the uapi directory. The asm/linkage.h shouldn't ever have been exported anyway. No other arch does and it doesn't contain anything useful to userland, so remove the header-y line from the Kbuild file which triggers the export. Signed-off-by:
James Hogan <james.hogan@imgtec.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: linuxppc-dev@lists.ozlabs.org Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: David Woodhouse <dwmw2@infradead.org> Cc: David Howells <dhowells@redhat.com> Signed-off-by:
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