(add comment for the previous mail, sorry for the duplication)
There is no store_ex pairing with this load_ex. It is not necessary and
gave wrong hint to the cache system.
Signed-off-by: Kenneth Lee <liguo...@hisilicon.com>
---
arch/arm64/include/asm/spinlock.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm64/include/asm/spinlock.h
b/arch/arm64/include/asm/spinlock.h
index c85e96d..3334c4f 100644
--- a/arch/arm64/include/asm/spinlock.h
+++ b/arch/arm64/include/asm/spinlock.h
@@ -63,7 +63,7 @@ static inline void arch_spin_lock(arch_spinlock_t *lock)
*/
" sevl\n"
"2: wfe\n"
-" ldaxrh %w2, %4\n"
+" ldrh %w2, %4\n"
" eor %w1, %w2, %w0, lsr #16\n"
" cbnz %w1, 2b\n"
/* We got the lock. Critical section starts here. */
--
1.9.1
