Messages in this thread Patch in this message | | | From | Jason Low <> | Subject | [RFC][PATCH 6/7] locking,s390: Remove s390 rwsem add and rwsem update | Date | Mon, 16 May 2016 17:38:05 -0700 |
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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 s390 implementation of rwsem_atomic_add() and rwsem_atomic_update().
Signed-off-by: Jason Low <jason.low2@hpe.com> --- arch/s390/include/asm/rwsem.h | 37 ------------------------------------- 1 file changed, 37 deletions(-)
diff --git a/arch/s390/include/asm/rwsem.h b/arch/s390/include/asm/rwsem.h index c75e447..597e7e9 100644 --- a/arch/s390/include/asm/rwsem.h +++ b/arch/s390/include/asm/rwsem.h @@ -207,41 +207,4 @@ static inline void __downgrade_write(struct rw_semaphore *sem) rwsem_downgrade_wake(sem); } -/* - * implement atomic add functionality - */ -static inline void rwsem_atomic_add(long delta, struct rw_semaphore *sem) -{ - signed long old, new; - - asm volatile( - " lg %0,%2\n" - "0: lgr %1,%0\n" - " agr %1,%4\n" - " csg %0,%1,%2\n" - " jl 0b" - : "=&d" (old), "=&d" (new), "=Q" (sem->count) - : "Q" (sem->count), "d" (delta) - : "cc", "memory"); -} - -/* - * implement exchange and add functionality - */ -static inline long rwsem_atomic_update(long delta, struct rw_semaphore *sem) -{ - signed long old, new; - - asm volatile( - " lg %0,%2\n" - "0: lgr %1,%0\n" - " agr %1,%4\n" - " csg %0,%1,%2\n" - " jl 0b" - : "=&d" (old), "=&d" (new), "=Q" (sem->count) - : "Q" (sem->count), "d" (delta) - : "cc", "memory"); - return new; -} - #endif /* _S390_RWSEM_H */ -- 2.1.4
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