ext4: constify xattr_handler

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/ext4/acl.c

@@ -454,7 +454,7 @@ release_and_out:
 	return error;
 }
 
-struct xattr_handler ext4_xattr_acl_access_handler = {
+const struct xattr_handler ext4_xattr_acl_access_handler = {
 	.prefix	= POSIX_ACL_XATTR_ACCESS,
 	.flags	= ACL_TYPE_ACCESS,
 	.list	= ext4_xattr_list_acl_access,
@@ -462,7 +462,7 @@ struct xattr_handler ext4_xattr_acl_access_handler = {
 	.set	= ext4_xattr_set_acl,
 };
 
-struct xattr_handler ext4_xattr_acl_default_handler = {
+const struct xattr_handler ext4_xattr_acl_default_handler = {
 	.prefix	= POSIX_ACL_XATTR_DEFAULT,
 	.flags	= ACL_TYPE_DEFAULT,
 	.list	= ext4_xattr_list_acl_default,

fs/ext4/xattr.c

@@ -97,7 +97,7 @@ static int ext4_xattr_list(struct dentry *dentry, char *buffer,
 
 static struct mb_cache *ext4_xattr_cache;
 
-static struct xattr_handler *ext4_xattr_handler_map[] = {
+static const struct xattr_handler *ext4_xattr_handler_map[] = {
 	[EXT4_XATTR_INDEX_USER]		     = &ext4_xattr_user_handler,
 #ifdef CONFIG_EXT4_FS_POSIX_ACL
 	[EXT4_XATTR_INDEX_POSIX_ACL_ACCESS]  = &ext4_xattr_acl_access_handler,
@@ -109,7 +109,7 @@ static struct xattr_handler *ext4_xattr_handler_map[] = {
 #endif
 };
 
-struct xattr_handler *ext4_xattr_handlers[] = {
+const struct xattr_handler *ext4_xattr_handlers[] = {
 	&ext4_xattr_user_handler,
 	&ext4_xattr_trusted_handler,
 #ifdef CONFIG_EXT4_FS_POSIX_ACL
@@ -122,10 +122,10 @@ struct xattr_handler *ext4_xattr_handlers[] = {
 	NULL
 };
 
-static inline struct xattr_handler *
+static inline const struct xattr_handler *
 ext4_xattr_handler(int name_index)
 {
-	struct xattr_handler *handler = NULL;
+	const struct xattr_handler *handler = NULL;
 
 	if (name_index > 0 && name_index < ARRAY_SIZE(ext4_xattr_handler_map))
 		handler = ext4_xattr_handler_map[name_index];
@@ -332,7 +332,7 @@ ext4_xattr_list_entries(struct dentry *dentry, struct ext4_xattr_entry *entry,
 	size_t rest = buffer_size;
 
 	for (; !IS_LAST_ENTRY(entry); entry = EXT4_XATTR_NEXT(entry)) {
-		struct xattr_handler *handler =
+		const struct xattr_handler *handler =
 			ext4_xattr_handler(entry->e_name_index);
 
 		if (handler) {

fs/ext4/xattr.h

@@ -65,11 +65,11 @@ struct ext4_xattr_entry {
 
 # ifdef CONFIG_EXT4_FS_XATTR
 
-extern struct xattr_handler ext4_xattr_user_handler;
-extern struct xattr_handler ext4_xattr_trusted_handler;
-extern struct xattr_handler ext4_xattr_acl_access_handler;
-extern struct xattr_handler ext4_xattr_acl_default_handler;
-extern struct xattr_handler ext4_xattr_security_handler;
+extern const struct xattr_handler ext4_xattr_user_handler;
+extern const struct xattr_handler ext4_xattr_trusted_handler;
+extern const struct xattr_handler ext4_xattr_acl_access_handler;
+extern const struct xattr_handler ext4_xattr_acl_default_handler;
+extern const struct xattr_handler ext4_xattr_security_handler;
 
 extern ssize_t ext4_listxattr(struct dentry *, char *, size_t);
 
@@ -86,7 +86,7 @@ extern int ext4_expand_extra_isize_ea(struct inode *inode, int new_extra_isize,
 extern int init_ext4_xattr(void);
 extern void exit_ext4_xattr(void);
 
-extern struct xattr_handler *ext4_xattr_handlers[];
+extern const struct xattr_handler *ext4_xattr_handlers[];
 
 # else  /* CONFIG_EXT4_FS_XATTR */
 

fs/ext4/xattr_security.c

@@ -69,7 +69,7 @@ ext4_init_security(handle_t *handle, struct inode *inode, struct inode *dir)
 	return err;
 }
 
-struct xattr_handler ext4_xattr_security_handler = {
+const struct xattr_handler ext4_xattr_security_handler = {
 	.prefix	= XATTR_SECURITY_PREFIX,
 	.list	= ext4_xattr_security_list,
 	.get	= ext4_xattr_security_get,

fs/ext4/xattr_trusted.c

@@ -51,7 +51,7 @@ ext4_xattr_trusted_set(struct dentry *dentry, const char *name,
 			      name, value, size, flags);
 }
 
-struct xattr_handler ext4_xattr_trusted_handler = {
+const struct xattr_handler ext4_xattr_trusted_handler = {
 	.prefix	= XATTR_TRUSTED_PREFIX,
 	.list	= ext4_xattr_trusted_list,
 	.get	= ext4_xattr_trusted_get,

fs/ext4/xattr_user.c

@@ -54,7 +54,7 @@ ext4_xattr_user_set(struct dentry *dentry, const char *name,
 			      name, value, size, flags);
 }
 
-struct xattr_handler ext4_xattr_user_handler = {
+const struct xattr_handler ext4_xattr_user_handler = {
 	.prefix	= XATTR_USER_PREFIX,
 	.list	= ext4_xattr_user_list,
 	.get	= ext4_xattr_user_get,