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slub: make slab_index() return unsigned int

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slab_index() returns index of an object within a slab which is at most
u15 (or u16?).

Iterators additionally guarantee that "p >= addr".

Link: http://lkml.kernel.org/r/20180305200730.15812-22-adobriyan@gmail.com
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Acked-by: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alexey Dobriyan 2018-04-05 16:21:35 -07:00 • committed by Linus Torvalds
commit 284b50ddcf
1 changed files with 1 additions and 1 deletions
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2
mm/slub.c
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@ -311,7 +311,7 @@ static inline void set_freepointer(struct kmem_cache *s, void *object, void *fp)
__p += (__s)->size, __idx++)
/* Determine object index from a given position */
static inline int slab_index(void *p, struct kmem_cache *s, void *addr)
static inline unsigned int slab_index(void *p, struct kmem_cache *s, void *addr)
{
return (p - addr) / s->size;
}