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authorLinus Torvalds <torvalds@linux-foundation.org>2014-08-05 01:09:06 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2014-08-05 01:09:06 +0200
commit8efb90cf1e80129fad197b916714e1d01ee183d2 (patch)
tree8eacf9e5f34cc7a9e2b553974b9f9181d61be294 /arch/sparc
parentMerge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kerne... (diff)
parentarch, locking: Ciao arch_mutex_cpu_relax() (diff)
downloadlinux-8efb90cf1e80129fad197b916714e1d01ee183d2.tar.xz
linux-8efb90cf1e80129fad197b916714e1d01ee183d2.zip
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/sparc')
-rw-r--r--arch/sparc/include/asm/processor_32.h2
-rw-r--r--arch/sparc/include/asm/processor_64.h1
2 files changed, 3 insertions, 0 deletions
diff --git a/arch/sparc/include/asm/processor_32.h b/arch/sparc/include/asm/processor_32.h
index a564817bbc2e..812fd08f3e62 100644
--- a/arch/sparc/include/asm/processor_32.h
+++ b/arch/sparc/include/asm/processor_32.h
@@ -119,6 +119,8 @@ extern struct task_struct *last_task_used_math;
int do_mathemu(struct pt_regs *regs, struct task_struct *fpt);
#define cpu_relax() barrier()
+#define cpu_relax_lowlatency() cpu_relax()
+
extern void (*sparc_idle)(void);
#endif
diff --git a/arch/sparc/include/asm/processor_64.h b/arch/sparc/include/asm/processor_64.h
index 7028fe1a7c04..6924bdefe148 100644
--- a/arch/sparc/include/asm/processor_64.h
+++ b/arch/sparc/include/asm/processor_64.h
@@ -216,6 +216,7 @@ unsigned long get_wchan(struct task_struct *task);
"nop\n\t" \
".previous" \
::: "memory")
+#define cpu_relax_lowlatency() cpu_relax()
/* Prefetch support. This is tuned for UltraSPARC-III and later.
* UltraSPARC-I will treat these as nops, and UltraSPARC-II has