diff --git a/include/linux/slab.h b/include/linux/slab.h
index e7a9c6b4241219cbfa8a909a3a76bc571ccd77d2..1ef822e31c774892ffc08d668fd58d357bef5d29 100644
--- a/include/linux/slab.h
+++ b/include/linux/slab.h
@@ -20,11 +20,11 @@ typedef struct kmem_cache kmem_cache_t __deprecated;
  * Flags to pass to kmem_cache_create().
  * The ones marked DEBUG are only valid if CONFIG_SLAB_DEBUG is set.
  */
-#define	SLAB_DEBUG_FREE		0x00000100UL	/* DEBUG: Perform (expensive) checks on free */
-#define	SLAB_DEBUG_INITIAL	0x00000200UL	/* DEBUG: Call constructor (as verifier) */
-#define	SLAB_RED_ZONE		0x00000400UL	/* DEBUG: Red zone objs in a cache */
-#define	SLAB_POISON		0x00000800UL	/* DEBUG: Poison objects */
-#define	SLAB_HWCACHE_ALIGN	0x00002000UL	/* Align objs on cache lines */
+#define SLAB_DEBUG_FREE		0x00000100UL	/* DEBUG: Perform (expensive) checks on free */
+#define SLAB_DEBUG_INITIAL	0x00000200UL	/* DEBUG: Call constructor (as verifier) */
+#define SLAB_RED_ZONE		0x00000400UL	/* DEBUG: Red zone objs in a cache */
+#define SLAB_POISON		0x00000800UL	/* DEBUG: Poison objects */
+#define SLAB_HWCACHE_ALIGN	0x00002000UL	/* Align objs on cache lines */
 #define SLAB_CACHE_DMA		0x00004000UL	/* Use GFP_DMA memory */
 #define SLAB_MUST_HWCACHE_ALIGN	0x00008000UL	/* Force alignment even if debuggin is active */
 #define SLAB_STORE_USER		0x00010000UL	/* DEBUG: Store the last owner for bug hunting */
@@ -34,9 +34,9 @@ typedef struct kmem_cache kmem_cache_t __deprecated;
 #define SLAB_MEM_SPREAD		0x00100000UL	/* Spread some memory over cpuset */
 
 /* Flags passed to a constructor functions */
-#define	SLAB_CTOR_CONSTRUCTOR	0x001UL		/* If not set, then deconstructor */
+#define SLAB_CTOR_CONSTRUCTOR	0x001UL		/* If not set, then deconstructor */
 #define SLAB_CTOR_ATOMIC	0x002UL		/* Tell constructor it can't sleep */
-#define	SLAB_CTOR_VERIFY	0x004UL		/* Tell constructor it's a verify call */
+#define SLAB_CTOR_VERIFY	0x004UL		/* Tell constructor it's a verify call */
 
 /*
  * struct kmem_cache related prototypes
@@ -55,7 +55,7 @@ void *kmem_cache_zalloc(struct kmem_cache *, gfp_t);
 void kmem_cache_free(struct kmem_cache *, void *);
 unsigned int kmem_cache_size(struct kmem_cache *);
 const char *kmem_cache_name(struct kmem_cache *);
-int kmem_ptr_validate(struct kmem_cache *cachep, void *ptr);
+int kmem_ptr_validate(struct kmem_cache *cachep, const void *ptr);
 
 #ifdef CONFIG_NUMA
 extern void *kmem_cache_alloc_node(struct kmem_cache *, gfp_t flags, int node);
@@ -93,19 +93,15 @@ static inline void *kcalloc(size_t n, size_t size, gfp_t flags)
  * ways to convert kmalloc() calls to kmem_cache_alloc() invocations by selecting
  * the appropriate general cache at compile time.
  */
+
 #ifdef CONFIG_SLAB
 #include <linux/slab_def.h>
 #else
-
 /*
  * Fallback definitions for an allocator not wanting to provide
  * its own optimized kmalloc definitions (like SLOB).
  */
 
-#if defined(CONFIG_NUMA) || defined(CONFIG_DEBUG_SLAB)
-#error "SLAB fallback definitions not usable for NUMA or Slab debug"
-#endif
-
 /**
  * kmalloc - allocate memory
  * @size: how many bytes of memory are required.
@@ -151,7 +147,7 @@ static inline void *kcalloc(size_t n, size_t size, gfp_t flags)
  *
  * %__GFP_REPEAT - If allocation fails initially, try once more before failing.
  */
-void *kmalloc(size_t size, gfp_t flags)
+static inline void *kmalloc(size_t size, gfp_t flags)
 {
 	return __kmalloc(size, flags);
 }
@@ -161,12 +157,24 @@ void *kmalloc(size_t size, gfp_t flags)
  * @size: how many bytes of memory are required.
  * @flags: the type of memory to allocate (see kmalloc).
  */
-void *kzalloc(size_t size, gfp_t flags)
+static inline void *kzalloc(size_t size, gfp_t flags)
 {
 	return __kzalloc(size, flags);
 }
 #endif
 
+#ifndef CONFIG_NUMA
+static inline void *kmalloc_node(size_t size, gfp_t flags, int node)
+{
+	return kmalloc(size, flags);
+}
+
+static inline void *__kmalloc_node(size_t size, gfp_t flags, int node)
+{
+	return __kmalloc(size, flags);
+}
+#endif /* !CONFIG_NUMA */
+
 /*
  * kmalloc_track_caller is a special version of kmalloc that records the
  * calling function of the routine calling it for slab leak tracking instead
@@ -208,12 +216,8 @@ extern void *__kmalloc_node_track_caller(size_t, gfp_t, int, void *);
 #define kmalloc_node_track_caller(size, flags, node) \
 	kmalloc_track_caller(size, flags)
 
-static inline void *kmalloc_node(size_t size, gfp_t flags, int node)
-{
-	return kmalloc(size, flags);
-}
+#endif /* DEBUG_SLAB */
 
-#endif /* !CONFIG_NUMA */
 #endif	/* __KERNEL__ */
 #endif	/* _LINUX_SLAB_H */
 
diff --git a/mm/slab.c b/mm/slab.c
index c7576b9027a6fbe53c754053890036f94c0e69fe..9d3550086c93273fc848e70a9c403a674bf780f5 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -3541,7 +3541,7 @@ EXPORT_SYMBOL(kmem_cache_zalloc);
  *
  * Currently only used for dentry validation.
  */
-int fastcall kmem_ptr_validate(struct kmem_cache *cachep, void *ptr)
+int fastcall kmem_ptr_validate(struct kmem_cache *cachep, const void *ptr)
 {
 	unsigned long addr = (unsigned long)ptr;
 	unsigned long min_addr = PAGE_OFFSET;
diff --git a/mm/slob.c b/mm/slob.c
index b90091c4b08c1889983c2f7640b812ddab4794b5..2e9236e10ed12bc0ac7f1a67261d0de3abd634e4 100644
--- a/mm/slob.c
+++ b/mm/slob.c
@@ -334,7 +334,7 @@ int kmem_cache_shrink(struct kmem_cache *d)
 }
 EXPORT_SYMBOL(kmem_cache_shrink);
 
-int kmem_ptr_validate(struct kmem_cache *a, void *b)
+int kmem_ptr_validate(struct kmem_cache *a, const void *b)
 {
 	return 0;
 }