[PATCH 2/2] ARM: mcs_spinlock: Drop smp_wmb in arch_mcs_spin_lock_contended()
From: Alexander A Sverdlin
Date: Wed Jan 27 2021 - 15:04:28 EST
From: Alexander Sverdlin <alexander.sverdlin@xxxxxxxxx>
Drop smp_wmb in arch_mcs_spin_lock_contended() after adding in into
ARCH-independent code.
Signed-off-by: Alexander Sverdlin <alexander.sverdlin@xxxxxxxxx>
---
arch/arm/include/asm/mcs_spinlock.h | 2 --
1 file changed, 2 deletions(-)
diff --git a/arch/arm/include/asm/mcs_spinlock.h b/arch/arm/include/asm/mcs_spinlock.h
index 529d2cf..d8fa921 100644
--- a/arch/arm/include/asm/mcs_spinlock.h
+++ b/arch/arm/include/asm/mcs_spinlock.h
@@ -8,8 +8,6 @@
/* MCS spin-locking. */
#define arch_mcs_spin_lock_contended(lock) \
do { \
- /* Ensure prior stores are observed before we enter wfe. */ \
- smp_mb(); \
while (!(smp_load_acquire(lock))) \
wfe(); \
} while (0) \
--
2.10.2