idr: reduce the unneeded check in free_layer()
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>
diff --git a/lib/idr.c b/lib/idr.c
index 9ed37a7..39158ab 100644
--- a/lib/idr.c
+++ b/lib/idr.c
@@ -145,7 +145,7 @@
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);
call_rcu(&p->rcu_head, idr_layer_rcu_free);
}