From: Peter Zijlstra <peterz@infradead.org>
Date: Wed, 24 Aug 2011 13:32:31 +0000 (+0200)
Subject: microblaze: Remove __ARCH_WANT_INTERRUPTS_ON_CTXSW usage
X-Git-Tag: v3.2-rc1~110^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=84ac218f0257a0cfd7689d9a44f53118dbf307b3;p=pandora-kernel.git

microblaze: Remove __ARCH_WANT_INTERRUPTS_ON_CTXSW usage

As far as I can tell the only reason microblaze has
__ARCH_WANT_INTERRUPTS_ON_CTXSW is because it initializes new task state
with interrupts enabled so that on switch_to() interrupts get enabled.

So change copy_thread() to clear MSR_IE instead of set it, this will
ensure switch_to() will always keep IRQs disabled.

The scheduler will disable IRQs when taking rq->lock in schedule() and
enable IRQs in finish_lock_switch() after its done its magic.

This leaves ARM the only __ARCH_WANT_INTERRUPTS_ON_CTXSW user.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Michal Simek <monstr@monstr.eu>
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