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Commit 73b29505 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

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: default avatarDavidlohr Bueso <davidlohr.bueso@hp.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 6d49dab8

ipc/sem.c

+1 −3
Original line number Diff line number Diff line
@@ -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)