[PATCH 4/5] selinux: mark some global variables __ro_after_init

[Ondrej Mosnacek <omosnace@xxxxxxxxxx>]

All of these are never modified outside initcalls, so they can be
__ro_after_init.

Signed-off-by: Ondrej Mosnacek <omosnace@xxxxxxxxxx>
---
 security/selinux/avc.c        | 10 +++++-----
 security/selinux/netlink.c    |  2 +-
 security/selinux/selinuxfs.c  |  4 ++--
 security/selinux/ss/avtab.c   |  4 ++--
 security/selinux/ss/ebitmap.c |  2 +-
 security/selinux/ss/hashtab.c |  2 +-
 6 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/security/selinux/avc.c b/security/selinux/avc.c
index 3c05827608b6a..ad451cf9375e4 100644
--- a/security/selinux/avc.c
+++ b/security/selinux/avc.c
@@ -118,11 +118,11 @@ void avc_set_cache_threshold(struct selinux_avc *avc,
 	avc->avc_cache_threshold = cache_threshold;
 }
 
-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 avc_callback_node *avc_callbacks __ro_after_init;
+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)
 {
diff --git a/security/selinux/netlink.c b/security/selinux/netlink.c
index 621e2e9cd6a1d..1760aee712fd2 100644
--- a/security/selinux/netlink.c
+++ b/security/selinux/netlink.c
@@ -19,7 +19,7 @@
 
 #include "security.h"
 
-static struct sock *selnl;
+static struct sock *selnl __ro_after_init;
 
 static int selnl_msglen(int msgtype)
 {
diff --git a/security/selinux/selinuxfs.c b/security/selinux/selinuxfs.c
index 4fdfe7b67df89..01a7d50ed39b8 100644
--- a/security/selinux/selinuxfs.c
+++ b/security/selinux/selinuxfs.c
@@ -2204,8 +2204,8 @@ static struct file_system_type sel_fs_type = {
 	.kill_sb	= sel_kill_sb,
 };
 
-static struct vfsmount *selinuxfs_mount;
-struct path selinux_null;
+static struct vfsmount *selinuxfs_mount __ro_after_init;
+struct path selinux_null __ro_after_init;
 
 static int __init init_sel_fs(void)
 {
diff --git a/security/selinux/ss/avtab.c b/security/selinux/ss/avtab.c
index 0172d87e2b9ae..6dcb6aa4db7f0 100644
--- a/security/selinux/ss/avtab.c
+++ b/security/selinux/ss/avtab.c
@@ -23,8 +23,8 @@
 #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.
diff --git a/security/selinux/ss/ebitmap.c b/security/selinux/ss/ebitmap.c
index 14bedc95c6dcf..61fcbb8d0f880 100644
--- a/security/selinux/ss/ebitmap.c
+++ b/security/selinux/ss/ebitmap.c
@@ -26,7 +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)
 {
diff --git a/security/selinux/ss/hashtab.c b/security/selinux/ss/hashtab.c
index dab8c25c739b9..3881787ce492c 100644
--- a/security/selinux/ss/hashtab.c
+++ b/security/selinux/ss/hashtab.c
@@ -9,7 +9,7 @@
 #include <linux/errno.h>
 #include "hashtab.h"
 
-static struct kmem_cache *hashtab_node_cachep;
+static struct kmem_cache *hashtab_node_cachep __ro_after_init;
 
 /*
  * Here we simply round the number of elements up to the nearest power of two.
-- 
2.29.2