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slab: Common Kmalloc cache determination

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Extract the optimized lookup functions from slub and put them into
slab_common.c. Then make slab use these functions as well.

Joonsoo notes that this fixes some issues with constant folding which
also reduces the code size for slub.

https://lkml.org/lkml/2012/10/20/82

Signed-off-by: Christoph Lameter <[email protected]>
Signed-off-by: Pekka Enberg <[email protected]>
This commit is contained in:
Christoph Lameter 2013-01-10 19:14:19 +00:00 • committed by Pekka Enberg
commit 2c59dd6544
5 changed files with 124 additions and 173 deletions
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3
mm/slab.h
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@ -38,6 +38,9 @@ unsigned long calculate_alignment(unsigned long flags,
#ifndef CONFIG_SLOB
/* Kmalloc array related functions */
void create_kmalloc_caches(unsigned long);
/* Find the kmalloc slab corresponding for a certain size */
struct kmem_cache *kmalloc_slab(size_t, gfp_t);
#endif