constify security_path_chroot()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

include/linux/lsm_hooks.h

@@ -1376,7 +1376,7 @@ union security_list_options {
 				struct dentry *new_dentry);
 	int (*path_chmod)(const struct path *path, umode_t mode);
 	int (*path_chown)(const struct path *path, kuid_t uid, kgid_t gid);
-	int (*path_chroot)(struct path *path);
+	int (*path_chroot)(const struct path *path);
 #endif
 
 	int (*inode_alloc_security)(struct inode *inode);

include/linux/security.h

@@ -1457,7 +1457,7 @@ int security_path_rename(const struct path *old_dir, struct dentry *old_dentry,
 			 unsigned int flags);
 int security_path_chmod(const struct path *path, umode_t mode);
 int security_path_chown(const struct path *path, kuid_t uid, kgid_t gid);
-int security_path_chroot(struct path *path);
+int security_path_chroot(const struct path *path);
 #else	/* CONFIG_SECURITY_PATH */
 static inline int security_path_unlink(const struct path *dir, struct dentry *dentry)
 {
@@ -1518,7 +1518,7 @@ static inline int security_path_chown(const struct path *path, kuid_t uid, kgid_
 	return 0;
 }
 
-static inline int security_path_chroot(struct path *path)
+static inline int security_path_chroot(const struct path *path)
 {
 	return 0;
 }

security/security.c

@@ -499,7 +499,7 @@ int security_path_chown(const struct path *path, kuid_t uid, kgid_t gid)
 	return call_int_hook(path_chown, 0, path, uid, gid);
 }
 
-int security_path_chroot(struct path *path)
+int security_path_chroot(const struct path *path)
 {
 	return call_int_hook(path_chroot, 0, path);
 }

security/tomoyo/tomoyo.c

@@ -385,7 +385,7 @@ static int tomoyo_path_chown(const struct path *path, kuid_t uid, kgid_t gid)
  *
  * Returns 0 on success, negative value otherwise.
  */
-static int tomoyo_path_chroot(struct path *path)
+static int tomoyo_path_chroot(const struct path *path)
 {
 	return tomoyo_path_perm(TOMOYO_TYPE_CHROOT, path, NULL);
 }