From: Max Filippov <jcmvbkbc@gmail.com>
Date: Wed, 3 Jul 2013 16:23:28 +0000 (+0400)
Subject: xtensa: keep a3 and excsave1 on entry to exception handlers
X-Git-Tag: v3.12-rc1~15^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=99d5040ebc3cccc90dfe031f615ac3fbc79905b6;p=pandora-kernel.git

xtensa: keep a3 and excsave1 on entry to exception handlers

Based on the SMP patch by Joe Taylor and subsequent fixes.
Preserve exception table pointer (normally stored in excsave1 SR) as it
cannot be easily restored in SMP environment.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
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