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Subject[PATCH] arm_pmu: Mark expected switch fall-through
Date
When fall-through warnings was enabled by default the following warning
was starting to show up:

../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:
^~~~

Rework so that the compiler doesn't warn about fall-through.

Fixes: d93512ef0f0e ("Makefile: Globally enable fall-through warning")
Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
---

I'm not convinced that this is the correct patch to fix this issue.
However, I can't see why we do 'armpmu->start(armpmu);' only in 'case
CPU_PM_ENTER_FAILED' and why we not call function cpu_pm_pmu_setup()
there also, since in cpu_pm_pmu_setup() has a case prepared for
CPU_PM_ENTER_FAILED.

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..465a15705bab 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);
+ /* Fall through */
case CPU_PM_ENTER_FAILED:
armpmu->start(armpmu);
break;
--
2.20.1
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