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authorMichel Lespinasse <walken@google.com>2012-08-14 14:53:20 -0700
committerPekka Enberg <penberg@kernel.org>2012-08-16 09:32:19 +0300
commit48f2474144ac708f1faad97e82a863ca8214b602 (patch)
tree93ee03853f20d4dafe041d9ddf5641bd7437559a /mm/slab.c
parentd9b7f22623b5fa9cc189581dcdfb2ac605933bf4 (diff)
slab: do not call compound_head() in page_get_cache()
page_get_cache() does not need to call compound_head(), as its unique caller virt_to_slab() already makes sure to return a head page. Additionally, removing the compound_head() call makes page_get_cache() consistent with page_get_slab(). Signed-off-by: Michel Lespinasse <walken@google.com> Cc: Christoph Lameter <cl@linux-foundation.org> Cc: Pekka Enberg <penberg@kernel.org> Acked-by: David Rientjes <rientjes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Pekka Enberg <penberg@kernel.org>
Diffstat (limited to 'mm/slab.c')
-rw-r--r--mm/slab.c1
1 files changed, 0 insertions, 1 deletions
diff --git a/mm/slab.c b/mm/slab.c
index f8b0d539b482..cb6ce2dfc7cf 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -517,7 +517,6 @@ static bool slab_max_order_set __initdata;
static inline struct kmem_cache *page_get_cache(struct page *page)
{
- page = compound_head(page);
BUG_ON(!PageSlab(page));
return page->slab_cache;
}