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From: Denys Vlasenko <vda.linux@googlemail.com>
To: Oleg Nesterov <oleg@redhat.com>
Subject: [PATCH 0/2] Fixes and cleanups in PTRACE_SETOPTIONS
Date: Fri, 9 Sep 2011 08:22:30 +0200
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Cc: Tejun Heo <tj@kernel.org>, linux-kernel@vger.kernel.org,
        dvlasenk@redhat.com, Linus Torvalds <torvalds@linux-foundation.org>
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This patchset has two changes.

First patch makes ptrace(PTRACE_SETOPTIONS, pid, 0, <bogus value>)
to error out *without* changing any task->ptrace bits.

Second patch is a cleanup: PTRACE_SETOPTIONS code
clears all option bits in task->ptrace, then sets bits one-by-one.
This is butt-ugly.

-- 
vda