[PATCH] mm, slab: Drop unnecessary slabp->inuse < cachep->num test

[Zhang Yanfei]

From: Zhang Yanfei <zhangyanfei@xxxxxxxxxxxxxx>

In function cache_alloc_refill, we have used BUG_ON to ensure
that slabp->inuse is less than cachep->num before the while
test. And in the while body, we do not change the value of
slabp->inuse and cachep->num, so it is not necessary to test
if slabp->inuse < cachep->num test for every loop.

Signed-off-by: Zhang Yanfei <zhangyanfei@xxxxxxxxxxxxxx>
---
 mm/slab.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/mm/slab.c b/mm/slab.c
index 8ccd296..c2076c2 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -3004,7 +3004,7 @@ retry:
 		 */
 		BUG_ON(slabp->inuse >= cachep->num);
 
-		while (slabp->inuse < cachep->num && batchcount--) {
+		while (batchcount--) {
 			STATS_INC_ALLOCED(cachep);
 			STATS_INC_ACTIVE(cachep);
 			STATS_SET_HIGH(cachep);
-- 
1.7.1
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