From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sun, 18 Nov 2012 17:50:10 +0000 (-0500)
Subject: new helper: current_user_stack_pointer()
X-Git-Tag: v3.8-rc1~14^2~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1ca97bb541a1f5a735e697a8bba763cde3aab452;p=pandora-kernel.git

new helper: current_user_stack_pointer()

	Cross-architecture equivalent of rdusp(); default is
user_stack_pointer(current_pt_regs()) - that works for almost all
platforms that have usp saved in pt_regs.  The only exception from
that is ia64 - we want memory stack, not the backing store for
register one.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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