[PATCH] mm: trivial comment cleanup in slab.c

[Wang Sheng-Hui <shhuiw@gmail.com>]

Current struct kmem_cache has no 'lock' field, and slab page is
managed by struct kmem_cache_node, which has 'list_lock' field.

Clean up the related comment.

Signed-off-by: Wang Sheng-Hui <shhuiw@gmail.com>
---
 mm/slab.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/mm/slab.c b/mm/slab.c
index 3070b92..8f7170f 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -1724,7 +1724,8 @@ slab_out_of_memory(struct kmem_cache *cachep, gfp_t gfpflags, int nodeid)
 }

 /*
- * Interface to system's page allocator. No need to hold the cache-lock.
+ * Interface to system's page allocator. No need to hold the
+ * kmem_cache_node ->list_lock.
  *
  * If we requested dmaable memory, we will get it. Even if we
  * did not request dmaable memory, we might get it, but that
@@ -2026,9 +2027,9 @@ static void slab_destroy_debugcheck(struct kmem_cache *cachep,
  * @cachep: cache pointer being destroyed
  * @page: page pointer being destroyed
  *
- * Destroy all the objs in a slab, and release the mem back to the system.
- * Before calling the slab must have been unlinked from the cache.  The
- * cache-lock is not held/needed.
+ * Destroy all the objs in a slab page, and release the mem back to the system.
+ * Before calling the slab page must have been unlinked from the cache. The
+ * kmem_cache_node ->list_lock is not held/needed.
  */
 static void slab_destroy(struct kmem_cache *cachep, struct page *page)
 {
-- 
1.8.3.2

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