mm/sl[aou]b: Do slab aliasing call from common code
The slab aliasing logic causes some strange contortions in slub. So add
a call to deal with aliases to slab_common.c but disable it for other
slab allocators by providng stubs that fail to create aliases.
Full general support for aliases will require additional cleanup passes
and more standardization of fields in kmem_cache.
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
diff --git a/mm/slub.c b/mm/slub.c
index 91c9a2f..64d445e 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -3708,7 +3708,7 @@
slub_max_order = 0;
kmem_size = offsetof(struct kmem_cache, node) +
- nr_node_ids * sizeof(struct kmem_cache_node *);
+ nr_node_ids * sizeof(struct kmem_cache_node *);
/* Allocate two kmem_caches from the page allocator */
kmalloc_size = ALIGN(kmem_size, cache_line_size());
@@ -3922,7 +3922,7 @@
return NULL;
}
-struct kmem_cache *__kmem_cache_create(const char *name, size_t size,
+struct kmem_cache *__kmem_cache_alias(const char *name, size_t size,
size_t align, unsigned long flags, void (*ctor)(void *))
{
struct kmem_cache *s;
@@ -3939,11 +3939,18 @@
if (sysfs_slab_alias(s, name)) {
s->refcount--;
- return NULL;
+ s = NULL;
}
- return s;
}
+ return s;
+}
+
+struct kmem_cache *__kmem_cache_create(const char *name, size_t size,
+ size_t align, unsigned long flags, void (*ctor)(void *))
+{
+ struct kmem_cache *s;
+
s = kmem_cache_alloc(kmem_cache, GFP_KERNEL);
if (s) {
if (kmem_cache_open(s, name,