VFS: net/unix: d_backing_inode() annotations

places where we are dealing with S_ISSOCK file creation/lookups.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/net/unix/diag.c b/net/unix/diag.c
index ef542fb..c512f64 100644
--- a/net/unix/diag.c
+++ b/net/unix/diag.c
@@ -25,7 +25,7 @@
 
 	if (dentry) {
 		struct unix_diag_vfs uv = {
-			.udiag_vfs_ino = dentry->d_inode->i_ino,
+			.udiag_vfs_ino = d_backing_inode(dentry)->i_ino,
 			.udiag_vfs_dev = dentry->d_sb->s_dev,
 		};