The patch titled
Subject: slab: do not call compound_head() in page_get_cache()
has been added to the -mm tree. Its filename is
slab-do-not-call-compound_head-in-page_get_cache.patch
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------------------------------------------------------
From: Michel Lespinasse <walken@xxxxxxxxxx>
Subject: 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@xxxxxxxxxx>
Cc: Christoph Lameter <cl@xxxxxxxxxxxxxxxxxxxx>
Cc: Pekka Enberg <penberg@xxxxxxxxxx>
Acked-by: David Rientjes <rientjes@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/slab.c | 1 -
1 file changed, 1 deletion(-)
diff -puN mm/slab.c~slab-do-not-call-compound_head-in-page_get_cache mm/slab.c
--- a/mm/slab.c~slab-do-not-call-compound_head-in-page_get_cache
+++ a/mm/slab.c
@@ -485,7 +485,6 @@ static bool slab_max_order_set __initdat
static inline struct kmem_cache *page_get_cache(struct page *page)
{
- page = compound_head(page);
BUG_ON(!PageSlab(page));
return page->slab_cache;
}
_
Subject: Subject: slab: do not call compound_head() in page_get_cache()
Patches currently in -mm which might be from walken@xxxxxxxxxx are
slab-do-not-call-compound_head-in-page_get_cache.patch
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