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Commit 48f24741 authored by Michel Lespinasse's avatar Michel Lespinasse Committed by Pekka Enberg
Browse files

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: default avatarMichel Lespinasse <walken@google.com>
Cc: Christoph Lameter <cl@linux-foundation.org>
Cc: Pekka Enberg <penberg@kernel.org>
Acked-by: default avatarDavid Rientjes <rientjes@google.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarPekka Enberg <penberg@kernel.org>
parent d9b7f226

mm/slab.c

+0 −1
Original line number Diff line number Diff line
@@ -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;

}