slab: Common definition for the array of kmalloc caches

Have a common definition fo the kmalloc cache arrays in
SLAB and SLUB

Acked-by: Glauber Costa <glommer@parallels.com>
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

diff --git a/include/linux/slab.h b/include/linux/slab.h
index c017805..f2327a8 100644 (file)
--- a/include/linux/slab.h
+++ b/include/linux/slab.h
@@ -206,6 +206,11 @@ struct kmem_cache {
 #define KMALLOC_MIN_SIZE (1 << KMALLOC_SHIFT_LOW)
 #endif
 
+extern struct kmem_cache *kmalloc_caches[KMALLOC_SHIFT_HIGH + 1];
+#ifdef CONFIG_ZONE_DMA
+extern struct kmem_cache *kmalloc_dma_caches[KMALLOC_SHIFT_HIGH + 1];
+#endif
+
 /*
  * Figure out which kmalloc slab an allocation of a certain size
  * belongs to.

diff --git a/include/linux/slab_def.h b/include/linux/slab_def.h
index 4ff50e8..113ec08 100644 (file)
--- a/include/linux/slab_def.h
+++ b/include/linux/slab_def.h
@@ -102,9 +102,6 @@ struct kmem_cache {
         */
 };
 
-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);
 

diff --git a/include/linux/slub_def.h b/include/linux/slub_def.h
index 032028e..3701896 100644 (file)
--- a/include/linux/slub_def.h
+++ b/include/linux/slub_def.h
@@ -123,12 +123,6 @@ struct kmem_cache {
 #endif
 
 /*
- * We keep the general caches in an array of slab caches that are used for
- * 2^x bytes of allocations.
- */
-extern struct kmem_cache *kmalloc_caches[KMALLOC_SHIFT_HIGH + 1];
-
-/*
  * Find the slab cache for a given combination of allocation flags and size.
  *
  * This ought to end up with a global pointer to the right cache

diff --git a/mm/slab.c b/mm/slab.c
index 3416f4c..357f0bd 100644 (file)
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -318,14 +318,6 @@ static void free_block(struct kmem_cache *cachep, void **objpp, int len,
 static int enable_cpucache(struct kmem_cache *cachep, gfp_t gfp);
 static void cache_reap(struct work_struct *unused);
 
-struct kmem_cache *kmalloc_caches[KMALLOC_SHIFT_HIGH + 1];
-EXPORT_SYMBOL(kmalloc_caches);
-
-#ifdef CONFIG_ZONE_DMA
-struct kmem_cache *kmalloc_dma_caches[KMALLOC_SHIFT_HIGH + 1];
-EXPORT_SYMBOL(kmalloc_dma_caches);
-#endif
-
 static int slab_early_init = 1;
 
 #define INDEX_AC kmalloc_index(sizeof(struct arraycache_init))

diff --git a/mm/slab_common.c b/mm/slab_common.c
index 53adfbf..0437b81 100644 (file)
--- a/mm/slab_common.c
+++ b/mm/slab_common.c
@@ -319,6 +319,14 @@ struct kmem_cache *__init create_kmalloc_cache(const char *name, size_t size,
        return s;
 }
 
+struct kmem_cache *kmalloc_caches[KMALLOC_SHIFT_HIGH + 1];
+EXPORT_SYMBOL(kmalloc_caches);
+
+#ifdef CONFIG_ZONE_DMA
+struct kmem_cache *kmalloc_dma_caches[KMALLOC_SHIFT_HIGH + 1];
+EXPORT_SYMBOL(kmalloc_dma_caches);
+#endif
+
 #endif /* !CONFIG_SLOB */
 
 

diff --git a/mm/slub.c b/mm/slub.c
index d0f72ee..527cbfb 100644 (file)
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -3174,13 +3174,6 @@ int __kmem_cache_shutdown(struct kmem_cache *s)
  *             Kmalloc subsystem
  *******************************************************************/
 
-struct kmem_cache *kmalloc_caches[KMALLOC_SHIFT_HIGH + 1];
-EXPORT_SYMBOL(kmalloc_caches);
-
-#ifdef CONFIG_ZONE_DMA
-static struct kmem_cache *kmalloc_dma_caches[KMALLOC_SHIFT_HIGH + 1];
-#endif
-
 static int __init setup_slub_min_order(char *str)
 {
        get_option(&str, &slub_min_order);