From 5b3f683e694a835f5dfdab06102be1a50604c3b7 Mon Sep 17 00:00:00 2001 From: Philipp Hachtmann Date: Mon, 7 Apr 2014 18:25:23 +0200 Subject: s390/spinlock: cleanup spinlock code Improve the spinlock code in several aspects: - Have _raw_compare_and_swap return true if the operation has been successful instead of returning the old value. - Remove the "volatile" from arch_spinlock_t and arch_rwlock_t - Rename 'owner_cpu' to 'lock' - Add helper functions arch_spin_trylock_once / arch_spin_tryrelease_once [ Martin Schwidefsky: patch breakdown and code beautification ] Signed-off-by: Philipp Hachtmann Signed-off-by: Martin Schwidefsky --- arch/s390/include/asm/spinlock_types.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'arch/s390/include/asm/spinlock_types.h') diff --git a/arch/s390/include/asm/spinlock_types.h b/arch/s390/include/asm/spinlock_types.h index 9c76656a0af0..b2cd6ff7c2c5 100644 --- a/arch/s390/include/asm/spinlock_types.h +++ b/arch/s390/include/asm/spinlock_types.h @@ -6,13 +6,13 @@ #endif typedef struct { - volatile unsigned int owner_cpu; + unsigned int lock; } __attribute__ ((aligned (4))) arch_spinlock_t; -#define __ARCH_SPIN_LOCK_UNLOCKED { 0 } +#define __ARCH_SPIN_LOCK_UNLOCKED { .lock = 0, } typedef struct { - volatile unsigned int lock; + unsigned int lock; } arch_rwlock_t; #define __ARCH_RW_LOCK_UNLOCKED { 0 } -- cgit v1.2.3