Messages in this thread Patch in this message | | | From | Jason Low <> | Subject | [RFC][PATCH 3/7] locking,x86: Remove x86 rwsem add and rwsem update | Date | Mon, 16 May 2016 17:38:02 -0700 |
| |
The rwsem count has been converted to an atomic variable and the rwsem code now directly uses atomic_long_add() and atomic_long_add_return(), so we can remove the x86 implementation of rwsem_atomic_add() and rwsem_atomic_update().
Signed-off-by: Jason Low <jason.low2@hpe.com> --- arch/x86/include/asm/rwsem.h | 18 ------------------ 1 file changed, 18 deletions(-)
diff --git a/arch/x86/include/asm/rwsem.h b/arch/x86/include/asm/rwsem.h index d2f8d10..91cf42c 100644 --- a/arch/x86/include/asm/rwsem.h +++ b/arch/x86/include/asm/rwsem.h @@ -215,23 +215,5 @@ static inline void __downgrade_write(struct rw_semaphore *sem) : "memory", "cc"); } -/* - * implement atomic add functionality - */ -static inline void rwsem_atomic_add(long delta, struct rw_semaphore *sem) -{ - asm volatile(LOCK_PREFIX _ASM_ADD "%1,%0" - : "+m" (sem->count) - : "er" (delta)); -} - -/* - * implement exchange and add functionality - */ -static inline long rwsem_atomic_update(long delta, struct rw_semaphore *sem) -{ - return delta + xadd(&sem->count, delta); -} - #endif /* __KERNEL__ */ #endif /* _ASM_X86_RWSEM_H */ -- 2.1.4
| |