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| author | Michel Lespinasse <walken@google.com> | 2012-08-14 14:53:20 -0700 |
|---|---|---|
| committer | Pekka Enberg <penberg@kernel.org> | 2012-08-16 09:32:19 +0300 |
| commit | 48f2474144ac708f1faad97e82a863ca8214b602 (patch) | |
| tree | 93ee03853f20d4dafe041d9ddf5641bd7437559a /mm | |
| parent | d9b7f22623b5fa9cc189581dcdfb2ac605933bf4 (diff) | |
| download | linux-48f2474144ac708f1faad97e82a863ca8214b602.tar.gz linux-48f2474144ac708f1faad97e82a863ca8214b602.tar.bz2 linux-48f2474144ac708f1faad97e82a863ca8214b602.zip | |
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')
| -rw-r--r-- | mm/slab.c | 1 |
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; } |