diff options
| author | Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com> | 2010-05-05 22:56:42 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2010-05-12 11:23:34 +0200 |
| commit | 4308ad801193f14ff42cb746da37cf07e35f0d08 (patch) | |
| tree | d25466295270408c11a234658b70c43095aed4d3 | |
| parent | genirq: Add CPU mask affinity hint (diff) | |
| download | linux-4308ad801193f14ff42cb746da37cf07e35f0d08.tar.xz linux-4308ad801193f14ff42cb746da37cf07e35f0d08.zip | |
genirq: Clear CPU mask in affinity_hint when none is provided
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.
[ tglx: use zalloc_cpumask_var instead of clearing it under the lock ]
Signed-off-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Cc: davem@davemloft.net
Cc: arjan@linux.jf.intel.com
Cc: bhutchings@solarflare.com
LKML-Reference: <20100505205638.5426.87189.stgit@ppwaskie-hc2.jf.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| -rw-r--r-- | kernel/irq/proc.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c index 4f9427a30e14..09a2ee540bd2 100644 --- a/kernel/irq/proc.c +++ b/kernel/irq/proc.c @@ -38,14 +38,12 @@ static int irq_affinity_hint_proc_show(struct seq_file *m, void *v) unsigned long flags; cpumask_var_t mask; - if (!alloc_cpumask_var(&mask, GFP_KERNEL)) + if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) return -ENOMEM; raw_spin_lock_irqsave(&desc->lock, flags); if (desc->affinity_hint) cpumask_copy(mask, desc->affinity_hint); - else - cpumask_setall(mask); raw_spin_unlock_irqrestore(&desc->lock, flags); seq_cpumask(m, mask); |