[PATCH -mmotm] mm: fix kmemcheck.c build errors

[Joonsoo Kim]

mm-slab_common-move-kmem_cache-definition-to-internal-header.patch
in mmotm makes following build failure.

../mm/kmemcheck.c:70:7: error: dereferencing pointer to incomplete type
../mm/kmemcheck.c:83:15: error: dereferencing pointer to incomplete type
../mm/kmemcheck.c:95:8: error: dereferencing pointer to incomplete type
../mm/kmemcheck.c:95:21: error: dereferencing pointer to incomplete type

../mm/slab.h: In function 'cache_from_obj':
../mm/slab.h:283:2: error: implicit declaration of function
'memcg_kmem_enabled' [-Werror=implicit-function-declaration]

Add header files to fix kmemcheck.c build errors.

[iamjoonsoo.kim@xxxxxxx] move up memcontrol.h header
to fix build failure if CONFIG_MEMCG_KMEM=y too.
Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
---
 mm/kmemcheck.c |    1 +
 mm/slab.h      |    2 ++
 2 files changed, 3 insertions(+)

diff --git a/mm/kmemcheck.c b/mm/kmemcheck.c
index fd814fd..cab58bb 100644
--- a/mm/kmemcheck.c
+++ b/mm/kmemcheck.c
@@ -2,6 +2,7 @@
 #include <linux/mm_types.h>
 #include <linux/mm.h>
 #include <linux/slab.h>
+#include "slab.h"
 #include <linux/kmemcheck.h>
 
 void kmemcheck_alloc_shadow(struct page *page, int order, gfp_t flags, int node)
diff --git a/mm/slab.h b/mm/slab.h
index 13845d0..963a3f8 100644
--- a/mm/slab.h
+++ b/mm/slab.h
@@ -37,6 +37,8 @@ struct kmem_cache {
 #include <linux/slub_def.h>
 #endif
 
+#include <linux/memcontrol.h>
+
 /*
  * State of the slab allocator.
  *
-- 
1.7.9.5

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