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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2014-08-04 19:09:06 -0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-08-04 19:09:06 -0400 |
| commit | 8efb90cf1e80129fad197b916714e1d01ee183d2 (patch) | |
| tree | 8eacf9e5f34cc7a9e2b553974b9f9181d61be294 /arch/arm64 | |
| parent | 5bda4f638f36ef4c4e3b1397b02affc3db94356e (diff) | |
| parent | 3a6bfbc91df04b081a44d419e0260bad54abddf7 (diff) | |
Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull locking updates from Ingo Molnar:
"The main changes in this cycle are:
- big rtmutex and futex cleanup and robustification from Thomas
Gleixner
- mutex optimizations and refinements from Jason Low
- arch_mutex_cpu_relax() removal and related cleanups
- smaller lockdep tweaks"
* 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (23 commits)
arch, locking: Ciao arch_mutex_cpu_relax()
locking/lockdep: Only ask for /proc/lock_stat output when available
locking/mutexes: Optimize mutex trylock slowpath
locking/mutexes: Try to acquire mutex only if it is unlocked
locking/mutexes: Delete the MUTEX_SHOW_NO_WAITER macro
locking/mutexes: Correct documentation on mutex optimistic spinning
rtmutex: Make the rtmutex tester depend on BROKEN
futex: Simplify futex_lock_pi_atomic() and make it more robust
futex: Split out the first waiter attachment from lookup_pi_state()
futex: Split out the waiter check from lookup_pi_state()
futex: Use futex_top_waiter() in lookup_pi_state()
futex: Make unlock_pi more robust
rtmutex: Avoid pointless requeueing in the deadlock detection chain walk
rtmutex: Cleanup deadlock detector debug logic
rtmutex: Confine deadlock logic to futex
rtmutex: Simplify remove_waiter()
rtmutex: Document pi chain walk
rtmutex: Clarify the boost/deboost part
rtmutex: No need to keep task ref for lock owner check
rtmutex: Simplify and document try_to_take_rtmutex()
...
Diffstat (limited to 'arch/arm64')
| -rw-r--r-- | arch/arm64/include/asm/processor.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/processor.h b/arch/arm64/include/asm/processor.h index 77712454486b..3df21feeabdd 100644 --- a/arch/arm64/include/asm/processor.h +++ b/arch/arm64/include/asm/processor.h | |||
| @@ -129,6 +129,7 @@ extern void release_thread(struct task_struct *); | |||
| 129 | unsigned long get_wchan(struct task_struct *p); | 129 | unsigned long get_wchan(struct task_struct *p); |
| 130 | 130 | ||
| 131 | #define cpu_relax() barrier() | 131 | #define cpu_relax() barrier() |
| 132 | #define cpu_relax_lowlatency() cpu_relax() | ||
| 132 | 133 | ||
| 133 | /* Thread switching */ | 134 | /* Thread switching */ |
| 134 | extern struct task_struct *cpu_switch_to(struct task_struct *prev, | 135 | extern struct task_struct *cpu_switch_to(struct task_struct *prev, |