From: Jon Medhurst <tixy@yxit.co.uk>
Date: Fri, 18 Mar 2011 17:32:44 +0000 (+0000)
Subject: ARM: Thumb-2: Fix exception return sequence to restore stack correctly
X-Git-Tag: v3.1-rc1~258^2^2~2^2~74
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=594810621d9605dd40b6ce42e2e188a7dd6ba27c;p=pandora-kernel.git

ARM: Thumb-2: Fix exception return sequence to restore stack correctly

The implementation of svc_exit didn't take into account any stack hole
created by svc_entry; as happens with the undef handler when kprobes are
configured. The fix is to read the saved value of SP rather than trying
to calculate it.

Signed-off-by: Jon Medhurst <tixy@yxit.co.uk>
Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
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