linux-kernel - [PATCH] arm_pmu: mark expected switch fall-through

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Message-Id: <20190728235320.8600-1-mcroce@redhat.com>
Date:   Mon, 29 Jul 2019 01:53:20 +0200
From:   Matteo Croce <mcroce@...hat.com>
To:     linux-arm-kernel@...ts.infradead.org
Cc:     Will Deacon <will@...nel.org>, Mark Rutland <mark.rutland@....com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH] arm_pmu: mark expected switch fall-through

Mark switch cases where we are expecting to fall through,
fixes the following warning:

drivers/perf/arm_pmu.c: In function ‘cpu_pm_pmu_notify’:
drivers/perf/arm_pmu.c:726:3: warning: this statement may fall through [-Wimplicit-fallthrough=]
   cpu_pm_pmu_setup(armpmu, cmd);
   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/perf/arm_pmu.c:727:2: note: here
  case CPU_PM_ENTER_FAILED:
  ^~~~

Signed-off-by: Matteo Croce <mcroce@...hat.com>
---
 drivers/perf/arm_pmu.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/perf/arm_pmu.c b/drivers/perf/arm_pmu.c
index 2d06b8095a19..3eb711066a22 100644
--- a/drivers/perf/arm_pmu.c
+++ b/drivers/perf/arm_pmu.c
@@ -724,6 +724,7 @@ static int cpu_pm_pmu_notify(struct notifier_block *b, unsigned long cmd,
 		break;
 	case CPU_PM_EXIT:
 		cpu_pm_pmu_setup(armpmu, cmd);
+		/* fallthrough */
 	case CPU_PM_ENTER_FAILED:
 		armpmu->start(armpmu);
 		break;
-- 
2.21.0