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authorChristoph Lameter <cl@linux.com>2013-01-10 23:14:18 +0400
committerPekka Enberg <penberg@kernel.org>2013-02-01 14:32:06 +0400
commite33660165c901d18e7d3df2290db070d3e4b46df (patch)
treefac7e77d6a57d244262e73213976ae11519c3d5a /include/linux/slab_def.h
parentce6a50263d4ddeba1f0d08f16716a82770c03690 (diff)
downloadlinux-e33660165c901d18e7d3df2290db070d3e4b46df.tar.xz
slab: Use common kmalloc_index/kmalloc_size functions
Make slab use the common functions. We can get rid of a lot of old ugly stuff as a results. Among them the sizes array and the weird include/linux/kmalloc_sizes file and some pretty bad #include statements in slab_def.h. The one thing that is different in slab is that the 32 byte cache will also be created for arches that have page sizes larger than 4K. There are numerous smaller allocations that SLOB and SLUB can handle better because of their support for smaller allocation sizes so lets keep the 32 byte slab also for arches with > 4K pages. Reviewed-by: Glauber Costa <glommer@parallels.com> Signed-off-by: Christoph Lameter <cl@linux.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
Diffstat (limited to 'include/linux/slab_def.h')
-rw-r--r--include/linux/slab_def.h47
1 files changed, 12 insertions, 35 deletions
diff --git a/include/linux/slab_def.h b/include/linux/slab_def.h
index 8bb6e0eaf3c6..e0f30ef9525d 100644
--- a/include/linux/slab_def.h
+++ b/include/linux/slab_def.h
@@ -11,8 +11,6 @@
*/
#include <linux/init.h>
-#include <asm/page.h> /* kmalloc_sizes.h needs PAGE_SIZE */
-#include <asm/cache.h> /* kmalloc_sizes.h needs L1_CACHE_BYTES */
#include <linux/compiler.h>
/*
@@ -104,15 +102,8 @@ struct kmem_cache {
*/
};
-/* Size description struct for general caches. */
-struct cache_sizes {
- size_t cs_size;
- struct kmem_cache *cs_cachep;
-#ifdef CONFIG_ZONE_DMA
- struct kmem_cache *cs_dmacachep;
-#endif
-};
-extern struct cache_sizes malloc_sizes[];
+extern struct kmem_cache *kmalloc_caches[PAGE_SHIFT + MAX_ORDER];
+extern struct kmem_cache *kmalloc_dma_caches[PAGE_SHIFT + MAX_ORDER];
void *kmem_cache_alloc(struct kmem_cache *, gfp_t);
void *__kmalloc(size_t size, gfp_t flags);
@@ -133,26 +124,19 @@ static __always_inline void *kmalloc(size_t size, gfp_t flags)
void *ret;
if (__builtin_constant_p(size)) {
- int i = 0;
+ int i;
if (!size)
return ZERO_SIZE_PTR;
-#define CACHE(x) \
- if (size <= x) \
- goto found; \
- else \
- i++;
-#include <linux/kmalloc_sizes.h>
-#undef CACHE
- return NULL;
-found:
+ i = kmalloc_index(size);
+
#ifdef CONFIG_ZONE_DMA
if (flags & GFP_DMA)
- cachep = malloc_sizes[i].cs_dmacachep;
+ cachep = kmalloc_dma_caches[i];
else
#endif
- cachep = malloc_sizes[i].cs_cachep;
+ cachep = kmalloc_caches[i];
ret = kmem_cache_alloc_trace(cachep, flags, size);
@@ -186,26 +170,19 @@ static __always_inline void *kmalloc_node(size_t size, gfp_t flags, int node)
struct kmem_cache *cachep;
if (__builtin_constant_p(size)) {
- int i = 0;
+ int i;
if (!size)
return ZERO_SIZE_PTR;
-#define CACHE(x) \
- if (size <= x) \
- goto found; \
- else \
- i++;
-#include <linux/kmalloc_sizes.h>
-#undef CACHE
- return NULL;
-found:
+ i = kmalloc_index(size);
+
#ifdef CONFIG_ZONE_DMA
if (flags & GFP_DMA)
- cachep = malloc_sizes[i].cs_dmacachep;
+ cachep = kmalloc_dma_caches[i];
else
#endif
- cachep = malloc_sizes[i].cs_cachep;
+ cachep = kmalloc_caches[i];
return kmem_cache_alloc_node_trace(cachep, flags, node, size);
}