Patchwork powerpc: fix irq distribution

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Submitter Kim Phillips
Date May 18, 2012, 1:11 a.m.
Message ID <20120517201145.323398fa0f58f32c0bfe707f@freescale.com>
Download mbox | patch
Permalink /patch/160033/
State Accepted
Headers show

Comments

Kim Phillips - May 18, 2012, 1:11 a.m.
setting CONFIG_IRQ_ALL_CPUS distributes IRQs to CPUs only when
the number of online CPUs equals NR_CPUS.  See commit
280ff97494e0fef4124bee5c52e39b23a18dd283 "sparc64: fix and
optimize irq distribution" for more details.

Using the online mask fixes IRQ-to-CPU distribution on systems
that boot with less than NR_CPUS.

Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
---
 arch/powerpc/kernel/irq.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Patch

diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index 2a599ce..c05fd53 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -891,7 +891,7 @@  int irq_choose_cpu(const struct cpumask *mask)
 {
 	int cpuid;
 
-	if (cpumask_equal(mask, cpu_all_mask)) {
+	if (cpumask_equal(mask, cpu_online_mask)) {
 		static int irq_rover;
 		static DEFINE_RAW_SPINLOCK(irq_rover_lock);
 		unsigned long flags;