linux-kernel - [PATCH] genirq: Set initial default irq affinity to just CPU0

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Message-Id: <1224863858-7933-1-git-send-email-galak@kernel.crashing.org>
Date:	Fri, 24 Oct 2008 10:57:38 -0500
From:	Kumar Gala <galak@...nel.crashing.org>
To:	Linus Torvalds <torvalds@...l.org>
Cc:	linux-kernel@...r.kernel.org, linuxppc-dev@...abs.org,
	maxk@...lcomm.com, Andrew Morton <akpm@...l.org>,
	tglx@...utronix.de
Subject: [PATCH] genirq: Set initial default irq affinity to just CPU0

Commit 18404756765c713a0be4eb1082920c04822ce588 introduced a regression
on a subset of SMP based PPC systems whose interrupt controller only
allow setting an irq to a single processor.  The previous behavior
was only CPU0 was initially setup to get interrupts.  Revert back
to that behavior.

Signed-off-by: Kumar Gala <galak@...nel.crashing.org>
---
 kernel/irq/manage.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index c498a1b..728d36a 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -17,7 +17,7 @@
 
 #ifdef CONFIG_SMP
 
-cpumask_t irq_default_affinity = CPU_MASK_ALL;
+cpumask_t irq_default_affinity = CPU_MASK_CPU0;
 
 /**
  *	synchronize_irq - wait for pending IRQ handlers (on other CPUs)
-- 
1.5.5.1

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