iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
linux/arch/arm/kernel
History
Stephen Boyd 44424c3404 ARM: 7803/1: Fix deadlock scenario with smp_send_stop() 
If one process calls sys_reboot and that process then stops other
CPUs while those CPUs are within a spin_lock() region we can
potentially encounter a deadlock scenario like below.

CPU 0                   CPU 1
-----                   -----
                        spin_lock(my_lock)
smp_send_stop()
 <send IPI>             handle_IPI()
                         disable_preemption/irqs
                          while(1);
 <PREEMPT>
spin_lock(my_lock) <--- Waits forever

We shouldn't attempt to run any other tasks after we send a stop
IPI to a CPU so disable preemption so that this task runs to
completion. We use local_irq_disable() here for cross-arch
consistency with x86.

Reported-by: Sundarajan Srinivasan <sundaraj@codeaurora.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2013-08-01 14:41:39 +01:00
..
.gitignore
…
arch_timer.c
sched_clock: Make ARM's sched_clock generic for all architectures
2013-06-12 14:02:13 -07:00
armksyms.c
Merge branches 'audit', 'delay', 'fixes', 'misc' and 'sta2x11' into for-linus
2012-07-27 23:06:32 +01:00
arthur.c
…
asm-offsets.c
ARM: kernel: implement stack pointer save array through MPIDR hashing
2013-06-20 11:24:11 +01:00
atags_compat.c
ARM: 7505/1: split out ATAGS parsing
2012-09-03 22:55:56 +01:00
atags_parse.c
ARM: 7505/1: split out ATAGS parsing
2012-09-03 22:55:56 +01:00
atags_proc.c
procfs: new helper - PDE_DATA(inode)
2013-04-09 14:13:32 -04:00
atags.h
ARM: 7506/1: allow for ATAGS to be configured out when DT support is selected
2012-09-03 22:56:15 +01:00
bios32.c
ARM: pci: create pci_common_init_dev()
2013-06-03 08:02:47 +02:00
calls.S
ARM: 7665/1: Wire up kcmp syscall
2013-03-03 22:54:18 +00:00
cpuidle.c
cpuidle: Add common time keeping and irq enabling
2012-03-21 01:59:40 -04:00
crash_dump.c
crash_dump: export is_kdump_kernel to modules, consolidate elfcorehdr_addr, setup_elfcorehdr and saved_max_pfn
2011-03-23 19:47:19 -07:00
debug.S
ARM: compile fix for DEBUG_LL=y && MMU=n
2013-01-16 14:30:06 -08:00
devtree.c
ARM: dt: Only print warning, not WARN() on bad cpu map in device tree
2013-06-29 17:00:40 -07:00
dma-isa.c
ARM: dma-isa: request cascade channel after registering it
2009-12-24 18:34:08 +00:00
dma.c
locking, ARM: Annotate low level hw locks as raw
2011-09-13 11:12:14 +02:00
early_printk.c
early_printk: consolidate random copies of identical code
2013-04-29 18:28:13 -07:00
elf.c
Disintegrate asm/system.h for ARM
2012-03-28 18:30:01 +01:00
entry-armv.S
ARM: 7735/2: Preserve the user r/w register TPIDRURW on context switch and fork
2013-06-24 15:21:59 +01:00
entry-common.S
Merge branch 'devel-stable' into for-next
2013-06-29 11:44:43 +01:00
entry-header.S
Merge branch 'for-next' of git://git.pengutronix.de/git/ukl/linux into devel-stable
2013-05-22 10:52:24 +01:00
entry-v7m.S
ARM: 7800/1: ARMv7-M: Fix name of NVIC handler function
2013-07-31 11:12:58 +01:00
etm.c
ARM/etm/sysrq: fix inconstistent help message of sysrq key
2013-04-30 17:04:10 -07:00
fiq.c
ARM: fiq: change FIQ_START to a variable
2012-07-01 21:59:19 +08:00
fiqasm.S
ARM: 6938/1: fiq: Refactor {get,set}_fiq_regs() for Thumb-2
2011-05-26 10:31:06 +01:00
ftrace.c
ARM: 7468/1: ftrace: Trace function entry before updating index
2012-07-31 10:30:42 +01:00
head-common.S
arm: delete __cpuinit/__CPUINIT usage from all ARM users
2013-07-14 19:36:52 -04:00
head-nommu.S
arm: delete __cpuinit/__CPUINIT usage from all ARM users
2013-07-14 19:36:52 -04:00
head.S
arm: delete __cpuinit/__CPUINIT usage from all ARM users
2013-07-14 19:36:52 -04:00
hw_breakpoint.c
arm: delete __cpuinit/__CPUINIT usage from all ARM users
2013-07-14 19:36:52 -04:00
hyp-stub.S
ARM: 7786/1: hyp: fix macro parameterisation
2013-07-22 14:30:34 +01:00
insn.c
ARM: fix missing bug.h include in arch/arm/kernel/insn.c
2012-03-30 11:51:46 +01:00
insn.h
ARM: 7334/1: add jump label support
2012-03-24 09:38:56 +00:00
io.c
arm: convert core files from module.h to export.h
2011-10-31 19:30:49 -04:00
irq.c
ARM: irq: Call irqchip_init if no init_irq function is specified
2013-04-02 11:05:40 -07:00
isa.c
…
iwmmxt.S
ARM: pxa: fix logic error in PJ4 iWMMXt handling
2011-08-11 10:10:26 +08:00
jump_label.c
ARM: 7334/1: add jump label support
2012-03-24 09:38:56 +00:00
kgdb.c
kgdb,arm: fix register dump
2010-10-29 13:14:40 -05:00
kprobes-arm.c
ARM: 7181/1: Restrict kprobes probing SWP instructions to ARMv5 and below
2011-11-30 23:54:54 +00:00
kprobes-common.c
Disintegrate asm/system.h for ARM
2012-03-28 18:30:01 +01:00
kprobes-test-arm.c
ARM: kprobes: make more tests conditional
2012-10-09 17:07:43 +02:00
kprobes-test-thumb.c
ARM: 7174/1: Fix build error in kprobes test code on Thumb2 kernels
2011-11-26 21:58:53 +00:00
kprobes-test.c
treewide: fix printk typo in multiple drivers
2012-11-19 11:08:17 +01:00
kprobes-test.h
ARM: 7174/1: Fix build error in kprobes test code on Thumb2 kernels
2011-11-26 21:58:53 +00:00
kprobes-thumb.c
ARM: 7423/1: kprobes: run t32_simulate_ldr_literal() without insn slot
2012-06-14 15:11:44 +01:00
kprobes.c
hlist: drop the node parameter from iterators
2013-02-27 19:10:24 -08:00
kprobes.h
ARM: kprobes: Add exports for test code
2011-09-20 18:17:43 +00:00
machine_kexec.c
ARM: 7759/1: decouple CPU offlining from reboot/shutdown
2013-06-17 21:35:25 +01:00
Makefile
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2013-07-06 14:09:38 -07:00
module.c
Finally eradicate CONFIG_HOTPLUG
2013-06-03 14:20:18 -07:00
opcodes.c
ARM: 7206/1: Add generic ARM instruction set condition code checks.
2011-12-13 08:52:02 +00:00
patch.c
ARM: 7332/1: extract out code patch function from kprobes
2012-03-24 09:38:55 +00:00
patch.h
ARM: 7332/1: extract out code patch function from kprobes
2012-03-24 09:38:55 +00:00
perf_event_cpu.c
arm: delete __cpuinit/__CPUINIT usage from all ARM users
2013-07-14 19:36:52 -04:00
perf_event_v6.c
ARM: perf: don't pretend to support counting of L1I writes
2013-01-16 12:01:59 +00:00
perf_event_v7.c
ARM: 7663/1: perf: fix ARMv7 EVTYPE_MASK to include NSH bit
2013-03-03 22:54:17 +00:00
perf_event_xscale.c
ARM: perf: don't pretend to support counting of L1I writes
2013-01-16 12:01:59 +00:00
perf_event.c
ARM: 7765/1: perf: Record the user-mode PC in the call chain.
2013-06-24 15:23:29 +01:00
pj4-cp0.c
arm: remove several unnecessary module.h include instances
2011-10-31 19:30:48 -04:00
process.c
ARM: 7803/1: Fix deadlock scenario with smp_send_stop()
2013-08-01 14:41:39 +01:00
psci_smp.c
arm: delete __cpuinit/__CPUINIT usage from all ARM users
2013-07-14 19:36:52 -04:00
psci.c
arm: introduce psci_smp_ops
2013-05-21 14:24:11 +00:00
ptrace.c
ptrace/arm: revert "hw_breakpoints: Fix racy access to ptrace breakpoints"
2013-07-09 10:33:25 -07:00
relocate_kernel.S
ARM: 7065/1: kexec: ensure new kernel is entered in ARM state
2011-08-28 10:39:41 +01:00
return_address.c
ARM: 7676/1: fix a wrong value returned from CALLER_ADDRn
2013-03-19 11:43:46 +00:00
setup.c
ARM: 7787/1: virt: ensure visibility of __boot_cpu_mode
2013-07-26 12:01:17 +01:00
signal.c
ARM: mpu: protect the vectors page with an MPU region
2013-06-17 15:13:18 +01:00
signal.h
ARM: 7471/1: Revert "7442/1: Revert "remove unused restart trampoline""
2012-07-28 11:11:51 +01:00
sleep.S
ARM: kernel: implement stack pointer save array through MPIDR hashing
2013-06-20 11:24:11 +01:00
smp_scu.c
Merge branch 'for-next' of git://git.pengutronix.de/git/ukl/linux into devel-stable
2013-03-09 15:49:32 +00:00
smp_tlb.c
ARM: 7789/1: Do not run dummy_flush_tlb_a15_erratum() on non-Cortex-A15
2013-07-26 12:02:09 +01:00
smp_twd.c
arm: delete __cpuinit/__CPUINIT usage from all ARM users
2013-07-14 19:36:52 -04:00
smp.c
arm: delete __cpuinit/__CPUINIT usage from all ARM users
2013-07-14 19:36:52 -04:00
stacktrace.c
arm: convert core files from module.h to export.h
2011-10-31 19:30:49 -04:00
suspend.c
ARM: kernel: implement stack pointer save array through MPIDR hashing
2013-06-20 11:24:11 +01:00
swp_emulate.c
arm: single_open() leaks
2013-05-05 00:07:22 -04:00
sys_arm.c
arm: switch to generic fork/vfork/clone
2012-11-28 22:13:54 -05:00
sys_oabi-compat.c
userns: Convert stat to return values mapped from kuids and kgids
2012-05-15 14:08:35 -07:00
tcm.c
ARM: 7694/1: ARM, TCM: initialize TCM in paging_init(), instead of setup_arch()
2013-04-17 16:53:24 +01:00
thumbee.c
ARM: 7385/1: ThumbEE: Use cpuid macros to read ID_PFR0 for ThumbEE
2012-04-25 19:49:26 +01:00
time.c
sched_clock: Make ARM's sched_clock generic for all architectures
2013-06-12 14:02:13 -07:00
topology.c
ARM: 7742/1: topology: export cpu_topology
2013-06-05 23:32:26 +01:00
traps.c
Merge branch 'devel-stable' into for-next
2013-06-29 11:44:43 +01:00
unwind.c
ARM: unwinder: fix bisection to find origin in .idx section
2011-12-15 14:02:19 -08:00
vmlinux.lds.S
Finally eradicate CONFIG_HOTPLUG
2013-06-03 14:20:18 -07:00
xscale-cp0.c
arm: remove several unnecessary module.h include instances
2011-10-31 19:30:48 -04:00