tree ff0b0fc50790d6ae5a37c5317e67523985f87bbd
parent 8f371c7521545ee120364466514a4a2fc156c64f
author Max Filippov <jcmvbkbc@gmail.com> 1364251903 +0400
committer Chris Zankel <chris@zankel.net> 1368086831 -0700

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>