mm, sl[aou]b: Common definition for boot state of the slab allocators

All allocators have some sort of support for the bootstrap status.

Setup a common definition for the boot states and make all slab
allocators use that definition.

Reviewed-by: Glauber Costa <glommer@parallels.com>
Reviewed-by: Joonsoo Kim <js1304@gmail.com>
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

1 files changed, 5 insertions, 9 deletions

diff --git a/mm/slob.c b/mm/slob.c
index d63923d549ec..0111e0dece93 100644
--- a/mm/slob.c
+++ b/mm/slob.c
@@ -59,6 +59,8 @@
 
 #include <linux/kernel.h>
 #include <linux/slab.h>
+#include "slab.h"
+
 #include <linux/mm.h>
 #include <linux/swap.h> /* struct reclaim_state */
 #include <linux/cache.h>
@@ -531,6 +533,7 @@ struct kmem_cache *__kmem_cache_create(const char *name, size_t size,
                         c->align = align;
 
                 kmemleak_alloc(c, sizeof(struct kmem_cache), 1, GFP_KERNEL);
+                c->refcount = 1;
         }
         return c;
 }
@@ -616,19 +619,12 @@ int kmem_cache_shrink(struct kmem_cache *d)
 }
 EXPORT_SYMBOL(kmem_cache_shrink);
 
-static unsigned int slob_ready __read_mostly;
-
-int slab_is_available(void)
-{
-        return slob_ready;
-}
-
 void __init kmem_cache_init(void)
 {
-        slob_ready = 1;
+        slab_state = UP;
 }
 
 void __init kmem_cache_init_late(void)
 {
-        /* Nothing to do */
+        slab_state = FULL;
 }