[PATCH] [bugfix] replace unnessary ldax with common ldr
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From: Kenneth Lee <hidden>
Date: 2016-08-30 03:55:47
Also in:
lkml
Subsystem:
arm64 port (aarch64 architecture), locking primitives, the rest · Maintainers:
Catalin Marinas, Will Deacon, Peter Zijlstra, Ingo Molnar, Boqun Feng, Linus Torvalds
Signed-off-by: Kenneth Lee <redacted> --- 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