From a555ad450f973528825201a5fedbe46374f86644 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Mon, 23 Feb 2015 03:21:31 -0500
Subject: [PATCH] whack-a-mole: no need to set_fs(USER_DS) in
 {start,flush}_thread()

flush_old_exec() has already done that.  Back on 2011 a bunch of
instances like that had been kicked out, but that hadn't taken
care of then-out-of-tree architectures, obviously, and they served
as reinfection vector...

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