From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter P Waskiewicz Jr Subject: [PATCH linux-next] irq: Clear CPU mask in affinity_hint when none is provided Date: Wed, 05 May 2010 13:56:42 -0700 Message-ID: <20100505205638.5426.87189.stgit@ppwaskie-hc2.jf.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org To: tglx@linutronix.de, davem@davemloft.net, arjan@linux.jf.intel.com, bhutchings@solarflare.com Return-path: Received: from mga03.intel.com ([143.182.124.21]:60513 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753951Ab0EEUsN (ORCPT ); Wed, 5 May 2010 16:48:13 -0400 Sender: netdev-owner@vger.kernel.org List-ID: When an interrupt is disabled and torn down, the CPU mask returned through affinity_hint right now is all CPUs. Also, for drivers that don't provide an affinity_hint mask, this can be misleading. There should be no hint at all, meaning an empty CPU mask. Signed-off-by: Peter P Waskiewicz Jr --- kernel/irq/proc.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c index e1e7408..9ffa24d 100644 --- a/kernel/irq/proc.c +++ b/kernel/irq/proc.c @@ -45,7 +45,7 @@ static int irq_affinity_hint_proc_show(struct seq_file *m, void *v) if (desc->affinity_hint) cpumask_copy(mask, desc->affinity_hint); else - cpumask_setall(mask); + cpumask_clear(mask); raw_spin_unlock_irqrestore(&desc->lock, flags); seq_cpumask(m, mask);