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perf: provide sysfs_show for struct perf_pmu_events_attr

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(struct perf_pmu_events_attr) is defined in include/linux/perf_event.h,
but the only "show" for it is in x86 and contains x86 specific stuff.

Make a generic one for those of us who are just using the event_str.

Signed-off-by: Cody P Schafer <cody@linux.vnet.ibm.com>
Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Cody P Schafer 2015-01-30 13:45:57 -08:00 • committed by Michael Ellerman
parent fe12545e76
commit fd979c0132
2 changed files with 15 additions and 0 deletions
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3
include/linux/perf_event.h
View file

@ -897,6 +897,9 @@ struct perf_pmu_events_attr {
const char *event_str; const char *event_str;
}; };
ssize_t perf_event_sysfs_show(struct device *dev, struct device_attribute *attr,
char *page);
#define PMU_EVENT_ATTR(_name, _var, _id, _show) \ #define PMU_EVENT_ATTR(_name, _var, _id, _show) \
static struct perf_pmu_events_attr _var = { \ static struct perf_pmu_events_attr _var = { \
.attr = __ATTR(_name, 0444, _show, NULL), \ .attr = __ATTR(_name, 0444, _show, NULL), \

12
kernel/events/core.c
View file

@ -8276,6 +8276,18 @@ void __init perf_event_init(void)
!= 1024); != 1024);
} }
ssize_t perf_event_sysfs_show(struct device *dev, struct device_attribute *attr,
char *page)
{
struct perf_pmu_events_attr *pmu_attr =
container_of(attr, struct perf_pmu_events_attr, attr);
if (pmu_attr->event_str)
return sprintf(page, "%s\n", pmu_attr->event_str);
return 0;
}
static int __init perf_event_sysfs_init(void) static int __init perf_event_sysfs_init(void)
{ {
struct pmu *pmu; struct pmu *pmu;