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slab: use well-defined macro, virt_to_slab() 

This is trivial change, just use well-defined macro.

Acked-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Pekka Enberg <penberg@iki.fi>
This commit is contained in:
Joonsoo Kim 2013-10-24 10:07:43 +09:00 committed by Pekka Enberg
parent 68126702b4
commit 56f295ef0d
1 changed files with 2 additions and 5 deletions
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7
mm/slab.c
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@ -2865,7 +2865,6 @@ static inline void verify_redzone_free(struct kmem_cache *cache, void *obj)
static void *cache_free_debugcheck(struct kmem_cache *cachep, void *objp,
unsigned long caller)
{
struct page *page;
unsigned int objnr;
struct slab *slabp;
@ -2873,9 +2872,7 @@ static void *cache_free_debugcheck(struct kmem_cache *cachep, void *objp,
objp -= obj_offset(cachep);
kfree_debugcheck(objp);
page = virt_to_head_page(objp);
slabp = page->slab_page;
slabp = virt_to_slab(objp);
if (cachep->flags & SLAB_RED_ZONE) {
verify_redzone_free(cachep, objp);
@ -3087,7 +3084,7 @@ static void *cache_alloc_debugcheck_after(struct kmem_cache *cachep,
struct slab *slabp;
unsigned objnr;
slabp = virt_to_head_page(objp)->slab_page;
slabp = virt_to_slab(objp);
objnr = (unsigned)(objp - slabp->s_mem) / cachep->size;
slab_bufctl(slabp)[objnr] = BUFCTL_ACTIVE;
}