[RFC PATCH 05/32] mm: Convert virt_to_cache() to use struct slab
From: Vlastimil Babka <hidden>
Date: 2021-11-16 00:16:51
Subsystem:
memory management, slab allocator, the rest · Maintainers:
Andrew Morton, Vlastimil Babka, Harry Yoo, Linus Torvalds
From: "Matthew Wilcox (Oracle)" <willy@infradead.org> 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 <redacted> --- mm/slab.h | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/mm/slab.h b/mm/slab.h
index be42a467eeac..5203d19922b9 100644
--- a/mm/slab.h
+++ b/mm/slab.h@@ -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) { - struct page *page; + struct slab *slab; - page = virt_to_head_page(obj); - if (WARN_ONCE(!PageSlab(page), "%s: Object is not a Slab page!\n", + slab = virt_to_slab(obj); + if (WARN_ONCE(!slab, "%s: Object is not a Slab page!\n", __func__)) return NULL; - return page->slab_cache; + return slab->slab_cache; } static __always_inline void account_slab(struct slab *slab, int order,
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2.33.1