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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2020-08-30 21:43:50 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-08-30 21:43:50 +0300 |
| commit | b69bea8a657b681442765b06be92a2607b1bd875 (patch) | |
| tree | 8dcecaf4e5eff737500b73d402b4ef81c1b5368c /arch/arm64 | |
| parent | 3edd8db2d53fe6c96ad66248bb1479ae62807268 (diff) | |
| parent | eb1f00237aca2e368b93db79303f8433d1976d10 (diff) | |
| download | linux-b69bea8a657b681442765b06be92a2607b1bd875.tar.xz | |
Merge tag 'locking-urgent-2020-08-30' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull locking fixes from Thomas Gleixner:
"A set of fixes for lockdep, tracing and RCU:
- Prevent recursion by using raw_cpu_* operations
- Fixup the interrupt state in the cpu idle code to be consistent
- Push rcu_idle_enter/exit() invocations deeper into the idle path so
that the lock operations are inside the RCU watching sections
- Move trace_cpu_idle() into generic code so it's called before RCU
goes idle.
- Handle raw_local_irq* vs. local_irq* operations correctly
- Move the tracepoints out from under the lockdep recursion handling
which turned out to be fragile and inconsistent"
* tag 'locking-urgent-2020-08-30' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
lockdep,trace: Expose tracepoints
lockdep: Only trace IRQ edges
mips: Implement arch_irqs_disabled()
arm64: Implement arch_irqs_disabled()
nds32: Implement arch_irqs_disabled()
locking/lockdep: Cleanup
x86/entry: Remove unused THUNKs
cpuidle: Move trace_cpu_idle() into generic code
cpuidle: Make CPUIDLE_FLAG_TLB_FLUSHED generic
sched,idle,rcu: Push rcu_idle deeper into the idle path
cpuidle: Fixup IRQ state
lockdep: Use raw_cpu_*() for per-cpu variables
Diffstat (limited to 'arch/arm64')
| -rw-r--r-- | arch/arm64/include/asm/irqflags.h | 5 | ||||
| -rw-r--r-- | arch/arm64/kernel/process.c | 2 |
2 files changed, 5 insertions, 2 deletions
diff --git a/arch/arm64/include/asm/irqflags.h b/arch/arm64/include/asm/irqflags.h index aa4b6521ef14..ff328e5bbb75 100644 --- a/arch/arm64/include/asm/irqflags.h +++ b/arch/arm64/include/asm/irqflags.h @@ -95,6 +95,11 @@ static inline int arch_irqs_disabled_flags(unsigned long flags) return res; } +static inline int arch_irqs_disabled(void) +{ + return arch_irqs_disabled_flags(arch_local_save_flags()); +} + static inline unsigned long arch_local_irq_save(void) { unsigned long flags; diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c index b63ce4c54cfe..f1804496b935 100644 --- a/arch/arm64/kernel/process.c +++ b/arch/arm64/kernel/process.c @@ -123,10 +123,8 @@ void arch_cpu_idle(void) * This should do all the clock switching and wait for interrupt * tricks */ - trace_cpu_idle_rcuidle(1, smp_processor_id()); cpu_do_idle(); local_irq_enable(); - trace_cpu_idle_rcuidle(PWR_EVENT_EXIT, smp_processor_id()); } #ifdef CONFIG_HOTPLUG_CPU |