selinux: replace kmem_cache_create() with KMEM_CACHE()

Based on guidance in include/linux/slab.h, replace kmem_cache_create()
with KMEM_CACHE() for sources under security/selinux to simplify creation
of SLAB caches.
Signed-off-by: Eric Suen <ericsu@linux.microsoft.com>
[PM: minor grammar nits in the description]
Signed-off-by: Paul Moore <paul@paul-moore.com>

security/selinux/avc.c

@@ -134,18 +134,10 @@ static inline u32 avc_hash(u32 ssid, u32 tsid, u16 tclass)
  */
 void __init avc_init(void)
 {
-	avc_node_cachep = kmem_cache_create("avc_node", sizeof(struct avc_node),
-					0, SLAB_PANIC, NULL);
-	avc_xperms_cachep = kmem_cache_create("avc_xperms_node",
-					sizeof(struct avc_xperms_node),
-					0, SLAB_PANIC, NULL);
-	avc_xperms_decision_cachep = kmem_cache_create(
-					"avc_xperms_decision_node",
-					sizeof(struct avc_xperms_decision_node),
-					0, SLAB_PANIC, NULL);
-	avc_xperms_data_cachep = kmem_cache_create("avc_xperms_data",
-					sizeof(struct extended_perms_data),
-					0, SLAB_PANIC, NULL);
+	avc_node_cachep = KMEM_CACHE(avc_node, SLAB_PANIC);
+	avc_xperms_cachep = KMEM_CACHE(avc_xperms_node, SLAB_PANIC);
+	avc_xperms_decision_cachep = KMEM_CACHE(avc_xperms_decision_node, SLAB_PANIC);
+	avc_xperms_data_cachep = KMEM_CACHE(extended_perms_data, SLAB_PANIC);
 }
 
 int avc_get_hash_stats(char *page)

security/selinux/ss/avtab.c

@@ -604,9 +604,6 @@ int avtab_write(struct policydb *p, struct avtab *a, void *fp)
 
 void __init avtab_cache_init(void)
 {
-	avtab_node_cachep = kmem_cache_create(
-		"avtab_node", sizeof(struct avtab_node), 0, SLAB_PANIC, NULL);
-	avtab_xperms_cachep = kmem_cache_create(
-		"avtab_extended_perms", sizeof(struct avtab_extended_perms), 0,
-		SLAB_PANIC, NULL);
+	avtab_node_cachep = KMEM_CACHE(avtab_node, SLAB_PANIC);
+	avtab_xperms_cachep = KMEM_CACHE(avtab_extended_perms, SLAB_PANIC);
 }

security/selinux/ss/ebitmap.c

@@ -572,7 +572,5 @@ u32 ebitmap_hash(const struct ebitmap *e, u32 hash)
 
 void __init ebitmap_cache_init(void)
 {
-	ebitmap_node_cachep = kmem_cache_create("ebitmap_node",
-						sizeof(struct ebitmap_node), 0,
-						SLAB_PANIC, NULL);
+	ebitmap_node_cachep = KMEM_CACHE(ebitmap_node, SLAB_PANIC);
 }

security/selinux/ss/hashtab.c

@@ -194,7 +194,5 @@ int hashtab_duplicate(struct hashtab *new, const struct hashtab *orig,
 
 void __init hashtab_cache_init(void)
 {
-	hashtab_node_cachep = kmem_cache_create("hashtab_node",
-						sizeof(struct hashtab_node), 0,
-						SLAB_PANIC, NULL);
+	hashtab_node_cachep = KMEM_CACHE(hashtab_node, SLAB_PANIC);
 }