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| author | Lai Jiangshan <laijs@cn.fujitsu.com> | 2014-06-06 23:37:14 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-06-07 01:08:12 +0200 |
| commit | 15f3ec3f238a44181e1ae85b3cc2c27b9fece01b (patch) | |
| tree | a8bdb83f4c4b224fa33bc4dfc5f2ac08b250e980 /lib | |
| parent | idr: don't need to shink the free list when idr_remove() (diff) | |
| download | linux-15f3ec3f238a44181e1ae85b3cc2c27b9fece01b.tar.xz linux-15f3ec3f238a44181e1ae85b3cc2c27b9fece01b.zip | |
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>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/idr.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/idr.c b/lib/idr.c index 9ed37a7a031d..39158abebad1 100644 --- a/lib/idr.c +++ b/lib/idr.c @@ -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) { - 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); } |