From a4ceab1adbe960c781e9e2f659d7f7840eefd786 Mon Sep 17 00:00:00 2001
From: Behan Webster <behanw@converseincode.com>
Date: Wed, 27 Aug 2014 05:29:34 +0100
Subject: [PATCH] arm64: LLVMLinux: Use global stack pointer in
 return_address()

The global register current_stack_pointer holds the current stack pointer.
This change supports being able to compile the kernel with both gcc and clang.

Author: Mark Charlebois <charlebm@gmail.com>
Signed-off-by: Mark Charlebois <charlebm@gmail.com>
Signed-off-by: Behan Webster <behanw@converseincode.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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