GCC warns
arm_pmu_platform.c:234:5: error: 'err' may be used uninitialized in this function [-Werror=maybe-uninitialized]
This is because we rely on the for_each_cpu loop in armpmu_request_irqs
to initialise err. The warning is a little bogus because we know if
there were 0 CPUs this code would not be running.
Initialise err to 0 to avoid the warning.
Signed-off-by: Chris Packham <chris.packham@xxxxxxxxxxxxxxxxxxx>
---
This has been reported before in https://lkml.org/lkml/2018/3/5/508 I'm not
sure if it was dismmissed as "meh, gcc is wrong" or if it was just wainting for
someone with some round tuits.
drivers/perf/arm_pmu_platform.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/perf/arm_pmu_platform.c b/drivers/perf/arm_pmu_platform.c
index 971ff336494a..96075cecb0ae 100644
--- a/drivers/perf/arm_pmu_platform.c
+++ b/drivers/perf/arm_pmu_platform.c
@@ -160,7 +160,7 @@ static int pmu_parse_irqs(struct arm_pmu *pmu)
static int armpmu_request_irqs(struct arm_pmu *armpmu)
{
struct pmu_hw_events __percpu *hw_events = armpmu->hw_events;
- int cpu, err;
+ int cpu, err = 0;
for_each_cpu(cpu, &armpmu->supported_cpus) {
int irq = per_cpu(hw_events->irq, cpu);