From 408c3658b0d49315974ce8b5aed385c8e1527595 Mon Sep 17 00:00:00 2001
From: Konstantin Khlebnikov <k.khlebnikov@samsung.com>
Date: Thu, 5 Dec 2013 13:30:10 +0000
Subject: [PATCH] ARM64: check stack pointer in get_wchan

get_wchan() is lockless. Task may wakeup at any time and change its own stack,
thus each next stack frame may be overwritten and filled with random stuff.

Signed-off-by: Konstantin Khlebnikov <k.khlebnikov@samsung.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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Reading git-format-patch failed