From 085e83ff0c26842e6b14cd4b471625f6dd8a7bfd Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sat, 28 Sep 2013 12:54:06 -0400
Subject: [PATCH] fs/namespace.c: bury long-dead define

MNT_WRITER_UNDERFLOW_LIMIT has been missed 4 years ago when it became unused.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Reading git-format-patch failed