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Date: Mon, 15 May 2017 23:31:57 +0100
From: Al Viro <viro@ZenIV.linux.org.uk>
To: linux-kernel@vger.kernel.org
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
        Ingo Molnar <mingo@kernel.org>, Oleg Nesterov <oleg@redhat.com>,
        Peter Zijlstra <peterz@infradead.org>, Christoph Hellwig <hch@lst.de>
Subject: [RFC][PATCHSET] wait4()/waitid() cleanups
Message-ID: <20170515223157.GM390@ZenIV.linux.org.uk>
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	This series switches compat wait4() and waitid() variants away
from set_fs() use.  A couple of helpers (kernel_wait4() and kernel_waitid())
are introduced, copying siginfo/rusage to userland is taken to sys_wait...().
That allows both to simplify the guts of do_wait() machinery and avoid
messing with set_fs() in compat variants of these syscalls.

	Lightly tested, seems to survive without regressions.  Please,
review.