fs: constify tree_descr arrays passed to simple_fill_super()

simple_fill_super() is passed an array of tree_descr structures which
describe the files to create in the filesystem's root directory.  Since
these arrays are never modified intentionally, they should be 'const' so
that they are placed in .rodata and benefit from memory protection.
This patch updates the function signature and all users, and also
constifies tree_descr.name.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

3 files changed, 4 insertions, 4 deletions

diff --git a/security/inode.c b/security/inode.c
index 2cb14162ff8d..eccd58ef2ae8 100644
--- a/security/inode.c
+++ b/security/inode.c
@@ -28,7 +28,7 @@ static int mount_count;
 
 static int fill_super(struct super_block *sb, void *data, int silent)
 {
-        static struct tree_descr files[] = {{""}};
+        static const struct tree_descr files[] = {{""}};
 
         return simple_fill_super(sb, SECURITYFS_MAGIC, files);
 }
diff --git a/security/selinux/selinuxfs.c b/security/selinux/selinuxfs.c
index cb3fd98fb05a..6a9efedf7eb2 100644
--- a/security/selinux/selinuxfs.c
+++ b/security/selinux/selinuxfs.c
@@ -1496,7 +1496,7 @@ static const struct file_operations sel_avc_cache_stats_ops = {
 static int sel_make_avc_files(struct dentry *dir)
 {
         int i;
-        static struct tree_descr files[] = {
+        static const struct tree_descr files[] = {
                 { "cache_threshold",
                   &sel_avc_cache_threshold_ops, S_IRUGO|S_IWUSR },
                 { "hash_stats", &sel_avc_hash_stats_ops, S_IRUGO },
@@ -1805,7 +1805,7 @@ static int sel_fill_super(struct super_block *sb, void *data, int silent)
         struct inode *inode;
         struct inode_security_struct *isec;
 
-        static struct tree_descr selinux_files[] = {
+        static const struct tree_descr selinux_files[] = {
                 [SEL_LOAD] = {"load", &sel_load_ops, S_IRUSR|S_IWUSR},
                 [SEL_ENFORCE] = {"enforce", &sel_enforce_ops, S_IRUGO|S_IWUSR},
                 [SEL_CONTEXT] = {"context", &transaction_ops, S_IRUGO|S_IWUGO},
diff --git a/security/smack/smackfs.c b/security/smack/smackfs.c
index 366b8356f75b..f6482e53d55a 100644
--- a/security/smack/smackfs.c
+++ b/security/smack/smackfs.c
@@ -2855,7 +2855,7 @@ static int smk_fill_super(struct super_block *sb, void *data, int silent)
         int rc;
         struct inode *root_inode;
 
-        static struct tree_descr smack_files[] = {
+        static const struct tree_descr smack_files[] = {
                 [SMK_LOAD] = {
                         "load", &smk_load_ops, S_IRUGO|S_IWUSR},
                 [SMK_CIPSO] = {