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Date: Sat, 22 Dec 2012 06:03:46 +0000
From: Al Viro <viro@ZenIV.linux.org.uk>
To: Simon Marchi <simon.marchi@polymtl.ca>
Cc: cmetcalf@tilera.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/3] arch/tile: Implement user_stack_pointer
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On Sat, Dec 22, 2012 at 12:21:11AM -0500, Simon Marchi wrote:
> It is needed when we turn on HAVE_ARCH_TRACEHOOK.

... and if you check the mainline, you'll see it (and other missing
user_stack_pointer() instances) already in place, as part of infrastructure
for sigaltstack series.