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idr: reduce the unneeded check in free_layer()

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If "idr->hint == p" is true, it also implies "idr->hint" is true(not NULL).

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Lai Jiangshan 2014-06-06 14:37:14 -07:00 • committed by Linus Torvalds
parent aefb768297
commit 15f3ec3f23
1 changed files with 1 additions and 1 deletions
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2
lib/idr.c
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@ -145,7 +145,7 @@ static void idr_layer_rcu_free(struct rcu_head *head)
static inline void free_layer(struct idr *idr, struct idr_layer *p) static inline void free_layer(struct idr *idr, struct idr_layer *p)
{ {
if (idr->hint && idr->hint == p) if (idr->hint == p)
RCU_INIT_POINTER(idr->hint, NULL); RCU_INIT_POINTER(idr->hint, NULL);
call_rcu(&p->rcu_head, idr_layer_rcu_free); call_rcu(&p->rcu_head, idr_layer_rcu_free);
} }