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drivers/perf: arm_pmu: define armpmu_init_fn

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We expect an ARM PMU's init function to have a particular prototype,
which we open-code in a few places. This is less than ideal, considering
that we cast a void value to this type in one location, and a mismatch
could easily be missed.

Add a typedef so that we can ensure this is consistent.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: Jeremy Linton <jeremy.linton@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Mark Rutland 2017-04-11 09:39:45 +01:00 committed by Will Deacon
parent a9e469d1c8
commit 083c52144a
2 changed files with 4 additions and 2 deletions
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2
drivers/perf/arm_pmu.c
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@ -989,7 +989,7 @@ int arm_pmu_device_probe(struct platform_device *pdev,
const struct pmu_probe_info *probe_table)
{
const struct of_device_id *of_id;
const int (*init_fn)(struct arm_pmu *);
armpmu_init_fn init_fn;
struct device_node *node = pdev->dev.of_node;
struct arm_pmu *pmu;
int ret = -ENODEV;

4
include/linux/perf/arm_pmu.h
View File

@ -132,10 +132,12 @@ int armpmu_map_event(struct perf_event *event,
[PERF_COUNT_HW_CACHE_RESULT_MAX],
u32 raw_event_mask);
typedef int (*armpmu_init_fn)(struct arm_pmu *);
struct pmu_probe_info {
unsigned int cpuid;
unsigned int mask;
int (*init)(struct arm_pmu *);
armpmu_init_fn init;
};
#define PMU_PROBE(_cpuid, _mask, _fn) \