ARM: 7031/1: entry: Fix Thumb-2 undef handling for multi-CPU kernels
authorDave Martin <dave.martin@linaro.org>
Fri, 19 Aug 2011 17:00:08 +0000 (18:00 +0100)
committerRussell King <rmk+kernel@arm.linux.org.uk>
Mon, 17 Oct 2011 08:12:41 +0000 (09:12 +0100)
commitef4c53687e0adf5409896c4fa688b15f8d4dc0c0
treed5f472200e98e4863f1b34c8308f719ffc87f606
parent85519189df91c8aa9c368de0bdcfd7812200e614
ARM: 7031/1: entry: Fix Thumb-2 undef handling for multi-CPU kernels

When v6 and >=v7 boards are supported in the same kernel, the
__und_usr code currently makes a build-time assumption that Thumb-2
instructions occurring in userspace don't need to be supported.
Strictly speaking this is incorrect.

This patch fixes the above case by doing a run-time check on the
CPU architecture in these cases.  This only affects kernels which
support v6 and >=v7 CPUs together: plain v6 and plain v7 kernels
are unaffected.

Signed-off-by: Dave Martin <dave.martin@linaro.org>
Reviewed-by: Jon Medhurst <tixy@yxit.co.uk>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
arch/arm/kernel/entry-armv.S