From: Thomas Gleixner Date: Thu, 31 Dec 2015 16:30:49 +0000 (+0000) Subject: x86/irq: Copy vectormask instead of an AND operation X-Git-Tag: firefly_0821_release~176^2~475^2~89 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=2636de2fc22c1f5e1b24ba7d9e6f6615ed9569a5;p=firefly-linux-kernel-4.4.55.git x86/irq: Copy vectormask instead of an AND operation commit 9ac15b7a8af4cf3337a101498c0ed690d23ade75 upstream. In the case that the new vector mask is a subset of the existing mask there is no point to do a AND operation of currentmask & newmask. The result is newmask. So we can simply copy the new mask to the current mask and be done with it. Preparatory patch for further consolidation. Signed-off-by: Thomas Gleixner Tested-by: Borislav Petkov Tested-by: Joe Lawrence Cc: Jiang Liu Cc: Jeremiah Mahler Cc: andy.shevchenko@gmail.com Cc: Guenter Roeck Link: http://lkml.kernel.org/r/20151231160106.640253454@linutronix.de Signed-off-by: Thomas Gleixner Signed-off-by: Greg Kroah-Hartman --- diff --git a/arch/x86/kernel/apic/vector.c b/arch/x86/kernel/apic/vector.c index d96b43c02ba7..641d592f524a 100644 --- a/arch/x86/kernel/apic/vector.c +++ b/arch/x86/kernel/apic/vector.c @@ -154,7 +154,7 @@ static int __assign_irq_vector(int irq, struct apic_chip_data *d, vector_cpumask); d->move_in_progress = cpumask_intersects(d->old_domain, cpu_online_mask); - cpumask_and(d->domain, d->domain, vector_cpumask); + cpumask_copy(d->domain, vector_cpumask); goto success; }