From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andi Kleen <andi@firstfloor.org>
Subject: Re: [PATCH 2/2] Perform check in iov_iter_fault_in_readable() by check_readable_bytes()
Date: Mon, 18 May 2009 12:16:14 +0200
Message-ID: <20090518101614.GM16682@one.firstfloor.org>
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Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>,
	Andi Kleen <andi@firstfloor.org>,
	Vitaly Mayatskikh <v.mayatskih@gmail.com>,
	Josef Bacik <josef@redhat.com>, sandeen@redhat.com,
	linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org
To: Jamie Lokier <jamie@shareable.org>
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> Is EFAULT really optional on systems with page protection?

It's de facto -- e.g. the x86-64 vsyscalls (getimeofday, time, clock_gettime,
getcpu) never implement it.

-Andi
-- 
ak@linux.intel.com -- Speaking for myself only.