[PATCH] security: mark kmem caches as __ro_after_init

[adobriyan@gmail.com (Alexey Dobriyan)]

Kmem caches are never reallocated once set up.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
---

 security/integrity/iint.c     |    3 ++-
 security/selinux/avc.c        |    9 +++++----
 security/selinux/hooks.c      |    5 +++--
 security/selinux/ss/avtab.c   |    5 +++--
 security/selinux/ss/ebitmap.c |    3 ++-
 security/selinux/ss/hashtab.c |    3 ++-
 security/smack/smack_lsm.c    |    3 ++-
 7 files changed, 19 insertions(+), 12 deletions(-)

--- a/security/integrity/iint.c
+++ b/security/integrity/iint.c
@@ -15,6 +15,7 @@
  *	- cache integrity information associated with an inode
  *	  using a rbtree tree.
  */
+#include <linux/cache.h>
 #include <linux/slab.h>
 #include <linux/module.h>
 #include <linux/spinlock.h>
@@ -25,7 +26,7 @@
 
 static struct rb_root integrity_iint_tree = RB_ROOT;
 static DEFINE_RWLOCK(integrity_iint_lock);
-static struct kmem_cache *iint_cache __read_mostly;
+static struct kmem_cache *iint_cache __ro_after_init;
 
 /*
  * __integrity_iint_find - return the iint associated with an inode
--- a/security/selinux/avc.c
+++ b/security/selinux/avc.c
@@ -13,6 +13,7 @@
  *	it under the terms of the GNU General Public License version 2,
  *	as published by the Free Software Foundation.
  */
+#include <linux/cache.h>
 #include <linux/types.h>
 #include <linux/stddef.h>
 #include <linux/kernel.h>
@@ -91,10 +92,10 @@ DEFINE_PER_CPU(struct avc_cache_stats, avc_cache_stats) = { 0 };
 
 static struct avc_cache avc_cache;
 static struct avc_callback_node *avc_callbacks;
-static struct kmem_cache *avc_node_cachep;
-static struct kmem_cache *avc_xperms_data_cachep;
-static struct kmem_cache *avc_xperms_decision_cachep;
-static struct kmem_cache *avc_xperms_cachep;
+static struct kmem_cache *avc_node_cachep __ro_after_init;
+static struct kmem_cache *avc_xperms_data_cachep __ro_after_init;
+static struct kmem_cache *avc_xperms_decision_cachep __ro_after_init;
+static struct kmem_cache *avc_xperms_cachep __ro_after_init;
 
 static inline int avc_hash(u32 ssid, u32 tsid, u16 tclass)
 {
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -24,6 +24,7 @@
  *	as published by the Free Software Foundation.
  */
 
+#include <linux/cache.h>
 #include <linux/init.h>
 #include <linux/kd.h>
 #include <linux/kernel.h>
@@ -129,8 +130,8 @@ __setup("selinux=", selinux_enabled_setup);
 int selinux_enabled = 1;
 #endif
 
-static struct kmem_cache *sel_inode_cache;
-static struct kmem_cache *file_security_cache;
+static struct kmem_cache *sel_inode_cache __ro_after_init;
+static struct kmem_cache *file_security_cache __ro_after_init;
 
 /**
  * selinux_secmark_enabled - Check to see if SECMARK is currently enabled
--- a/security/selinux/ss/avtab.c
+++ b/security/selinux/ss/avtab.c
@@ -17,14 +17,15 @@
  *	Tuned number of hash slots for avtab to reduce memory usage
  */
 
+#include <linux/cache.h>
 #include <linux/kernel.h>
 #include <linux/slab.h>
 #include <linux/errno.h>
 #include "avtab.h"
 #include "policydb.h"
 
-static struct kmem_cache *avtab_node_cachep;
-static struct kmem_cache *avtab_xperms_cachep;
+static struct kmem_cache *avtab_node_cachep __ro_after_init;
+static struct kmem_cache *avtab_xperms_cachep __ro_after_init;
 
 /* Based on MurmurHash3, written by Austin Appleby and placed in the
  * public domain.
--- a/security/selinux/ss/ebitmap.c
+++ b/security/selinux/ss/ebitmap.c
@@ -16,6 +16,7 @@
  *      Applied standard bit operations to improve bitmap scanning.
  */
 
+#include <linux/cache.h>
 #include <linux/kernel.h>
 #include <linux/slab.h>
 #include <linux/errno.h>
@@ -25,7 +26,7 @@
 
 #define BITS_PER_U64	(sizeof(u64) * 8)
 
-static struct kmem_cache *ebitmap_node_cachep;
+static struct kmem_cache *ebitmap_node_cachep __ro_after_init;
 
 int ebitmap_cmp(struct ebitmap *e1, struct ebitmap *e2)
 {
--- a/security/selinux/ss/hashtab.c
+++ b/security/selinux/ss/hashtab.c
@@ -4,13 +4,14 @@
  *
  * Author : Stephen Smalley, <sds@tycho.nsa.gov>
  */
+#include <linux/cache.h>
 #include <linux/kernel.h>
 #include <linux/slab.h>
 #include <linux/errno.h>
 #include <linux/sched.h>
 #include "hashtab.h"
 
-static struct kmem_cache *hashtab_node_cachep;
+static struct kmem_cache *hashtab_node_cachep __ro_after_init;
 
 struct hashtab *hashtab_create(u32 (*hash_value)(struct hashtab *h, const void *key),
 			       int (*keycmp)(struct hashtab *h, const void *key1, const void *key2),
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -18,6 +18,7 @@
  *      as published by the Free Software Foundation.
  */
 
+#include <linux/cache.h>
 #include <linux/xattr.h>
 #include <linux/pagemap.h>
 #include <linux/mount.h>
@@ -55,7 +56,7 @@
 DEFINE_MUTEX(smack_ipv6_lock);
 static LIST_HEAD(smk_ipv6_port_list);
 #endif
-static struct kmem_cache *smack_inode_cache;
+static struct kmem_cache *smack_inode_cache __ro_after_init;
 int smack_enabled;
 
 static const match_table_t smk_mount_tokens = {
--
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