ceph: mark ceph_fmt_xattr() as printf-like for better type checking

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

diff --git a/fs/ceph/xattr.c b/fs/ceph/xattr.c
index 3a733ac..197cb12 100644 (file)
--- a/fs/ceph/xattr.c
+++ b/fs/ceph/xattr.c
@@ -116,7 +116,8 @@ static ssize_t ceph_vxattrcb_layout(struct ceph_inode_info *ci, char *val,
  * NULL terminates however, so call it on a temporary buffer and then memcpy
  * the result into place.
  */
-static int ceph_fmt_xattr(char *val, size_t size, const char *fmt, ...)
+static __printf(3, 4)
+int ceph_fmt_xattr(char *val, size_t size, const char *fmt, ...)
 {
        int ret;
        va_list args;