fsnotify: initialize mask in fsnotify_perm

akpm got a warning the fsnotify_mask could be used uninitialized in
fsnotify_perm().  It's not actually possible but his compiler complained
about it.  This patch just initializes it to 0 to shut up the compiler.

Reported-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Eric Paris <eparis@redhat.com>

1 files changed, 5 insertions, 3 deletions

diff --git a/include/linux/fsnotify.h b/include/linux/fsnotify.h
index 64efda9aae6..59d0df43ff9 100644
--- a/include/linux/fsnotify.h
+++ b/include/linux/fsnotify.h
@@ -39,16 +39,18 @@ static inline int fsnotify_perm(struct file *file, int mask)
 {
         struct path *path = &file->f_path;
         struct inode *inode = path->dentry->d_inode;
-        __u32 fsnotify_mask;
+        __u32 fsnotify_mask = 0;
 
         if (file->f_mode & FMODE_NONOTIFY)
                 return 0;
         if (!(mask & (MAY_READ | MAY_OPEN)))
                 return 0;
-        if (mask & MAY_READ)
-                fsnotify_mask = FS_ACCESS_PERM;
         if (mask & MAY_OPEN)
                 fsnotify_mask = FS_OPEN_PERM;
+        else if (mask & MAY_READ)
+                fsnotify_mask = FS_ACCESS_PERM;
+        else
+                BUG();
 
         return fsnotify(inode, fsnotify_mask, path, FSNOTIFY_EVENT_PATH, NULL, 0);
 }