[PATCH for review] [38/145] x86_64: Switch rwlocks over to patchable lock prefix

[Andi Kleen]

r

This way their lock prefix can be patched away on UP

Signed-off-by: Andi Kleen <ak@xxxxxxx>

---
 include/asm-x86_64/spinlock.h |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

Index: linux/include/asm-x86_64/spinlock.h
===================================================================
--- linux.orig/include/asm-x86_64/spinlock.h
+++ linux/include/asm-x86_64/spinlock.h
@@ -125,13 +125,13 @@ static inline int __raw_write_trylock(ra
 
 static inline void __raw_read_unlock(raw_rwlock_t *rw)
 {
-	asm volatile("lock ; incl %0" :"=m" (rw->lock) : : "memory");
+	asm volatile(LOCK_PREFIX "incl %0" :"=m" (rw->lock) : : "memory");
 }
 
 static inline void __raw_write_unlock(raw_rwlock_t *rw)
 {
-	asm volatile("lock ; addl $" RW_LOCK_BIAS_STR ",%0"
-				: "=m" (rw->lock) : : "memory");
+	asm volatile(LOCK_PREFIX "addl %1,%0"
+				: "=m" (rw->lock) : "i" (RW_LOCK_BIAS) : "memory");
 }
 
 #endif /* __ASM_SPINLOCK_H */
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/