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ipc,rcu: Convert call_rcu(free_un) to kfree_rcu()

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The rcu callback free_un() just calls a kfree(),
so we use kfree_rcu() instead of the call_rcu(free_un).

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Manfred Spraul <manfred@colorfullife.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
This commit is contained in:
Lai Jiangshan 2011-03-18 12:09:35 +08:00 • committed by Paul E. McKenney
parent 449a68cc65
commit 693a8b6eec
1 changed files with 2 additions and 8 deletions
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10
ipc/sem.c
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@ -689,12 +689,6 @@ static int count_semzcnt (struct sem_array * sma, ushort semnum)
return semzcnt; return semzcnt;
} }
static void free_un(struct rcu_head *head)
{
struct sem_undo *un = container_of(head, struct sem_undo, rcu);
kfree(un);
}
/* Free a semaphore set. freeary() is called with sem_ids.rw_mutex locked /* Free a semaphore set. freeary() is called with sem_ids.rw_mutex locked
* as a writer and the spinlock for this semaphore set hold. sem_ids.rw_mutex * as a writer and the spinlock for this semaphore set hold. sem_ids.rw_mutex
* remains locked on exit. * remains locked on exit.
@ -714,7 +708,7 @@ static void freeary(struct ipc_namespace *ns, struct kern_ipc_perm *ipcp)
un->semid = -1; un->semid = -1;
list_del_rcu(&un->list_proc); list_del_rcu(&un->list_proc);
spin_unlock(&un->ulp->lock); spin_unlock(&un->ulp->lock);
call_rcu(&un->rcu, free_un); kfree_rcu(un, rcu);
} }
/* Wake up all pending processes and let them fail with EIDRM. */ /* Wake up all pending processes and let them fail with EIDRM. */
@ -1612,7 +1606,7 @@ void exit_sem(struct task_struct *tsk)
sem_unlock(sma); sem_unlock(sma);
wake_up_sem_queue_do(&tasks); wake_up_sem_queue_do(&tasks);
call_rcu(&un->rcu, free_un); kfree_rcu(un, rcu);
} }
kfree(ulp); kfree(ulp);
} }