From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: Thu, 10 May 2012 16:12:38 +0000 (+0000)
Subject: powerpc/irq: Fix another case of lazy IRQ state getting out of sync
X-Git-Tag: v3.4-rc7~8^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7c0482e3d055e5de056d3c693b821e39205b99ae;p=pandora-kernel.git

powerpc/irq: Fix another case of lazy IRQ state getting out of sync

So we have another case of paca->irq_happened getting out of
sync with the HW irq state. This can happen when a perfmon
interrupt occurs while soft disabled, as it will return to a
soft disabled but hard enabled context while leaving a stale
PACA_IRQ_HARD_DIS flag set.

This patch fixes it, and also adds a test for the condition
of those flags being out of sync in arch_local_irq_restore()
when CONFIG_TRACE_IRQFLAGS is enabled.

This helps catching those gremlins faster (and so far I
can't seem see any anymore, so that's good news).

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---

Reading git-diff-tree failed