Commit 912f5fbf authored by Andrey Ryabinin's avatar Andrey Ryabinin Committed by Linus Torvalds
Browse files

mm: slub: introduce virt_to_obj function

virt_to_obj takes kmem_cache address, address of slab page, address x
pointing somewhere inside slab object, and returns address of the
beginning of object.

Signed-off-by: default avatarAndrey Ryabinin <>
Acked-by: default avatarChristoph Lameter <>
Cc: Dmitry Vyukov <>
Cc: Konstantin Serebryany <>
Cc: Dmitry Chernenkov <>
Signed-off-by: default avatarAndrey Konovalov <>
Cc: Yuri Gribov <>
Cc: Konstantin Khlebnikov <>
Cc: Sasha Levin <>
Cc: Christoph Lameter <>
Cc: Joonsoo Kim <>
Cc: Dave Hansen <>
Cc: Andi Kleen <>
Cc: Ingo Molnar <>
Cc: Thomas Gleixner <>
Cc: "H. Peter Anvin" <>
Cc: Pekka Enberg <>
Cc: David Rientjes <>
Signed-off-by: default avatarAndrew Morton <>
Signed-off-by: default avatarLinus Torvalds <>
parent b8c73fc2
......@@ -110,4 +110,20 @@ static inline void sysfs_slab_remove(struct kmem_cache *s)
* virt_to_obj - returns address of the beginning of object.
* @s: object's kmem_cache
* @slab_page: address of slab page
* @x: address within object memory range
* Returns address of the beginning of object
static inline void *virt_to_obj(struct kmem_cache *s,
const void *slab_page,
const void *x)
return (void *)x - ((x - slab_page) % s->size);
#endif /* _LINUX_SLUB_DEF_H */
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