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authorMatthew Wilcox (Oracle) <willy@infradead.org>2021-10-04 14:45:54 +0100
committerVlastimil Babka <vbabka@suse.cz>2022-01-06 12:25:51 +0100
commit0c24811b12ba29a6881e8ec0d01ad3f3b091da02 (patch)
treea90af2ea9e658285a479510f066c17d477cd8be9 /mm/slub.c
parent82c1775dc11a954f3d8c4cb875dff24ea97bc82b (diff)
mm: Convert __ksize() to struct slab
In SLUB, use folios, and struct slab to access slab_cache field. In SLOB, use folios to properly resolve pointers beyond PAGE_SIZE offset of the object. [ vbabka@suse.cz: use folios, and only convert folio_test_slab() == true folios to struct 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>
Diffstat (limited to 'mm/slub.c')
-rw-r--r--mm/slub.c12
1 files changed, 5 insertions, 7 deletions
diff --git a/mm/slub.c b/mm/slub.c
index c94fb4b4d655..269e10d341a8 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -4527,19 +4527,17 @@ void __check_heap_object(const void *ptr, unsigned long n, struct page *page,
size_t __ksize(const void *object)
{
- struct page *page;
+ struct folio *folio;
if (unlikely(object == ZERO_SIZE_PTR))
return 0;
- page = virt_to_head_page(object);
+ folio = virt_to_folio(object);
- if (unlikely(!PageSlab(page))) {
- WARN_ON(!PageCompound(page));
- return page_size(page);
- }
+ if (unlikely(!folio_test_slab(folio)))
+ return folio_size(folio);
- return slab_ksize(page->slab_cache);
+ return slab_ksize(folio_slab(folio)->slab_cache);
}
EXPORT_SYMBOL(__ksize);