From 5b75a6af11357813a7eeb4a29d0261adbbfab556 Mon Sep 17 00:00:00 2001
From: Will Deacon <will.deacon@arm.com>
Date: Fri, 22 Aug 2014 14:25:21 +0100
Subject: [PATCH] arm64: perf: don't rely on layout of pt_regs when grabbing sp
 or pc

The current perf_regs code relies on sp and pc sitting just off the end
of the pt_regs->regs array. This is ugly and fragile, so this patch
checks for these register explicitly and returns the appropriate field.

Acked-by: Jean Pihet <jean.pihet@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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