From: Max Filippov <jcmvbkbc@gmail.com>
Date: Mon, 25 Mar 2013 22:51:43 +0000 (+0400)
Subject: xtensa: disable IRQs while IRQ handler is running
X-Git-Tag: v3.10-rc1~24^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=895666a9920f19bc256340aaf58d01da6e677a16;p=pandora-kernel.git

xtensa: disable IRQs while IRQ handler is running

IRQ handlers are expected to run with IRQs disabled.
See e.g. http://lwn.net/Articles/380931/ for a longer story.

This was overlooked in the commit
  2d1c645 xtensa: dispatch medium-priority interrupts
Revert to old behavior and simplify interrupt entry and exit code.
Interrupt handler still honours IRQ priority.

do_notify_resume/schedule must be called with interrupts enabled, enable
interrupts if we return from user exception.

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