Messages in this thread Patch in this message | | | From | Jason Low <> | Subject | [RFC][PATCH 4/7] locking,alpha: Remove Alpha rwsem add and rwsem update | Date | Mon, 16 May 2016 17:38:03 -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 alpha implementation of rwsem_atomic_add() and rwsem_atomic_update().
Signed-off-by: Jason Low <jason.low2@hpe.com> --- arch/alpha/include/asm/rwsem.h | 42 ------------------------------------------ 1 file changed, 42 deletions(-)
diff --git a/arch/alpha/include/asm/rwsem.h b/arch/alpha/include/asm/rwsem.h index 0131a70..a217bf8 100644 --- a/arch/alpha/include/asm/rwsem.h +++ b/arch/alpha/include/asm/rwsem.h @@ -191,47 +191,5 @@ static inline void __downgrade_write(struct rw_semaphore *sem) rwsem_downgrade_wake(sem); } -static inline void rwsem_atomic_add(long val, struct rw_semaphore *sem) -{ -#ifndef CONFIG_SMP - sem->count += val; -#else - long temp; - __asm__ __volatile__( - "1: ldq_l %0,%1\n" - " addq %0,%2,%0\n" - " stq_c %0,%1\n" - " beq %0,2f\n" - ".subsection 2\n" - "2: br 1b\n" - ".previous" - :"=&r" (temp), "=m" (sem->count) - :"Ir" (val), "m" (sem->count)); -#endif -} - -static inline long rwsem_atomic_update(long val, struct rw_semaphore *sem) -{ -#ifndef CONFIG_SMP - sem->count += val; - return sem->count; -#else - long ret, temp; - __asm__ __volatile__( - "1: ldq_l %0,%1\n" - " addq %0,%3,%2\n" - " addq %0,%3,%0\n" - " stq_c %2,%1\n" - " beq %2,2f\n" - ".subsection 2\n" - "2: br 1b\n" - ".previous" - :"=&r" (ret), "=m" (sem->count), "=&r" (temp) - :"Ir" (val), "m" (sem->count)); - - return ret; -#endif -} - #endif /* __KERNEL__ */ #endif /* _ALPHA_RWSEM_H */ -- 2.1.4
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