From 73b29505c36eeb4751eccad41f6aad78562521f8 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Fri, 3 May 2013 15:22:00 -0700 Subject: [PATCH] ipc: sem_putref() does not need the semaphore lock any more ipc_rcu_putref() uses atomics for the refcount, and the games to lock and unlock the semaphore just to try to keep the reference counting working are no longer useful. Acked-by: Davidlohr Bueso Cc: Rik van Riel Cc: Al Viro Signed-off-by: Linus Torvalds --- ipc/sem.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/ipc/sem.c b/ipc/sem.c index 4b4139f6ad5c..5cf7b4c093b3 100644 --- a/ipc/sem.c +++ b/ipc/sem.c @@ -329,9 +329,7 @@ static inline void sem_lock_and_putref(struct sem_array *sma) static inline void sem_putref(struct sem_array *sma) { - sem_lock_and_putref(sma); - sem_unlock(sma, -1); - rcu_read_unlock(); + ipc_rcu_putref(sma); } static inline void sem_rmid(struct ipc_namespace *ns, struct sem_array *s) -- 2.34.1