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mm: Convert virt_to_cache() to use struct slab 

This function is entirely self-contained, so can be converted from page
to slab.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Roman Gushchin <guro@fb.com>
Reviewed-by: Hyeonggon Yoo <42.hyeyoo@gmail.com>
This commit is contained in:
Matthew Wilcox (Oracle) 2021-10-04 14:45:53 +01:00 committed by Vlastimil Babka
parent b918653b4f
commit 82c1775dc1
1 changed files with 4 additions and 4 deletions
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8
mm/slab.h
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@ -574,13 +574,13 @@ static inline void memcg_slab_free_hook(struct kmem_cache *s,
static inline struct kmem_cache *virt_to_cache(const void *obj) static inline struct kmem_cache *virt_to_cache(const void *obj)
{ {
struct page *page; struct slab *slab;
page = virt_to_head_page(obj); slab = virt_to_slab(obj);
if (WARN_ONCE(!PageSlab(page), "%s: Object is not a Slab page!\n", if (WARN_ONCE(!slab, "%s: Object is not a Slab page!\n",
__func__)) __func__))
return NULL; return NULL;
return page->slab_cache; return slab->slab_cache;
} }
static __always_inline void account_slab(struct slab *slab, int order, static __always_inline void account_slab(struct slab *slab, int order,