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>

1 files changed, 4 insertions, 0 deletions

diff --git a/mm/slab_common.c b/mm/slab_common.c
index f18c06fd97c..adc42b01b25 100644
--- a/mm/slab_common.c
+++ b/mm/slab_common.c
@@ -115,6 +115,10 @@ struct kmem_cache *kmem_cache_create(const char *name, size_t size, size_t align
                 goto out_locked;
         }
 
+        s = __kmem_cache_alias(name, size, align, flags, ctor);
+        if (s)
+                goto out_locked;
+
         s = __kmem_cache_create(n, size, align, flags, ctor);
 
         if (s) {