diff options
Diffstat (limited to 'kernel/spinlock.c')
| -rw-r--r-- | kernel/spinlock.c | 20 |
1 files changed, 7 insertions, 13 deletions
diff --git a/kernel/spinlock.c b/kernel/spinlock.c index fb524b009ee..476c3741511 100644 --- a/kernel/spinlock.c +++ b/kernel/spinlock.c @@ -7,6 +7,11 @@ * * This file contains the spinlock/rwlock implementations for the * SMP and the DEBUG_SPINLOCK cases. (UP-nondebug inlines them) + * + * Note that some architectures have special knowledge about the + * stack frames of these functions in their profile_pc. If you + * change anything significant here that could change the stack + * frame contact the architecture maintainers. */ #include <linux/linkage.h> @@ -16,17 +21,6 @@ #include <linux/debug_locks.h> #include <linux/module.h> -/* - * Generic declaration of the raw read_trylock() function, - * architectures are supposed to optimize this: - */ -int __lockfunc generic__raw_read_trylock(raw_rwlock_t *lock) -{ - __raw_read_lock(lock); - return 1; -} -EXPORT_SYMBOL(generic__raw_read_trylock); - int __lockfunc _spin_trylock(spinlock_t *lock) { preempt_disable(); @@ -221,7 +215,7 @@ void __lockfunc _##op##_lock(locktype##_t *lock) \ if (!(lock)->break_lock) \ (lock)->break_lock = 1; \ while (!op##_can_lock(lock) && (lock)->break_lock) \ - cpu_relax(); \ + _raw_##op##_relax(&lock->raw_lock); \ } \ (lock)->break_lock = 0; \ } \ @@ -243,7 +237,7 @@ unsigned long __lockfunc _##op##_lock_irqsave(locktype##_t *lock) \ if (!(lock)->break_lock) \ (lock)->break_lock = 1; \ while (!op##_can_lock(lock) && (lock)->break_lock) \ - cpu_relax(); \ + _raw_##op##_relax(&lock->raw_lock); \ } \ (lock)->break_lock = 0; \ return flags; \ |