From: Alexander Monakov <amonakov@ispras.ru>
Date: Thu, 1 Mar 2018 20:25:36 +0000 (+0300)
Subject: drivers/perf: arm_pmu_platform: do not warn about affinity on uniprocessor
X-Git-Tag: v4.17-rc1~130^2~8
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=65bd053fbf46c44b9862cb1e7d76ee84f90e386e;p=linux.git

drivers/perf: arm_pmu_platform: do not warn about affinity on uniprocessor

If there is exactly one CPU present, there is no ambiguity: do not warn
that PMU setup would need to guess IRQ affinity.

Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Alexander Monakov <amonakov@ispras.ru>
Signed-off-by: Will Deacon <will.deacon@arm.com>
---

diff --git a/drivers/perf/arm_pmu_platform.c b/drivers/perf/arm_pmu_platform.c
index 7729eda5909d..971ff336494a 100644
--- a/drivers/perf/arm_pmu_platform.c
+++ b/drivers/perf/arm_pmu_platform.c
@@ -122,7 +122,7 @@ static int pmu_parse_irqs(struct arm_pmu *pmu)
 			return pmu_parse_percpu_irq(pmu, irq);
 	}
 
-	if (!pmu_has_irq_affinity(pdev->dev.of_node)) {
+	if (nr_cpu_ids != 1 && !pmu_has_irq_affinity(pdev->dev.of_node)) {
 		pr_warn("no interrupt-affinity property for %pOF, guessing.\n",
 			pdev->dev.of_node);
 	}