[patch 07/14] x86/irq: Copy vectormask instead of an AND operation

From	Thomas Gleixner <tglx@linutronix.de>
Newsgroups	linux.kernel
Subject	[patch 07/14] x86/irq: Copy vectormask instead of an AND operation
Date	2015-12-31 17:40 +0100
Message-ID	<qLOqE-6NB-47@gated-at.bofh.it> (permalink)
References	<qLOqC-6NB-11@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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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 <tglx@linutronix.de>
---
 arch/x86/kernel/apic/vector.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- 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,
 				       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;
 		}
 


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[patch 07/14] x86/irq: Copy vectormask instead of an AND operation Thomas Gleixner <tglx@linutronix.de> - 2015-12-31 17:40 +0100

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