diff options
| author | Davidlohr Bueso <dave@stgolabs.net> | 2017-09-09 02:15:01 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-09-09 04:26:49 +0300 |
| commit | a23ba907d5e65d6aeea3e59c82fda9cd206a7aad (patch) | |
| tree | a0bd42b27596cf758517fa004d1d8681a7eef932 /include/linux/rtmutex.h | |
| parent | 2161573ecd6931565936cb66793b2d2bf805c088 (diff) | |
| download | linux-a23ba907d5e65d6aeea3e59c82fda9cd206a7aad.tar.xz | |
locking/rtmutex: replace top-waiter and pi_waiters leftmost caching
... with the generic rbtree flavor instead. No changes
in semantics whatsoever.
Link: http://lkml.kernel.org/r/20170719014603.19029-10-dave@stgolabs.net
Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/rtmutex.h')
| -rw-r--r-- | include/linux/rtmutex.h | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/include/linux/rtmutex.h b/include/linux/rtmutex.h index 44fd002f7cd5..53fcbe9de7fd 100644 --- a/include/linux/rtmutex.h +++ b/include/linux/rtmutex.h @@ -22,18 +22,17 @@ extern int max_lock_depth; /* for sysctl */ * The rt_mutex structure * * @wait_lock: spinlock to protect the structure - * @waiters: rbtree root to enqueue waiters in priority order - * @waiters_leftmost: top waiter + * @waiters: rbtree root to enqueue waiters in priority order; + * caches top-waiter (leftmost node). * @owner: the mutex owner */ struct rt_mutex { raw_spinlock_t wait_lock; - struct rb_root waiters; - struct rb_node *waiters_leftmost; + struct rb_root_cached waiters; struct task_struct *owner; #ifdef CONFIG_DEBUG_RT_MUTEXES int save_state; - const char *name, *file; + const char *name, *file; int line; void *magic; #endif @@ -84,7 +83,7 @@ do { \ #define __RT_MUTEX_INITIALIZER(mutexname) \ { .wait_lock = __RAW_SPIN_LOCK_UNLOCKED(mutexname.wait_lock) \ - , .waiters = RB_ROOT \ + , .waiters = RB_ROOT_CACHED \ , .owner = NULL \ __DEBUG_RT_MUTEX_INITIALIZER(mutexname) \ __DEP_MAP_RT_MUTEX_INITIALIZER(mutexname)} |