Re: [PATCH 2/3] arch/tile: Implement user_stack_pointer

[Al Viro]

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.
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