[v3,2/5] perf: Allow a PMU to have a parent
Commit Message
Some PMUs have well defined parents such as PCI devices.
As the device_initialize() and device_add() are all within
pmu_dev_alloc() which is called from perf_pmu_register()
there is no opportunity to set the parent from within a driver.
Add a struct device *parent field to struct pmu and use that
to set the parent.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---
v3: No change
---
include/linux/perf_event.h | 1 +
kernel/events/core.c | 1 +
2 files changed, 2 insertions(+)
@@ -303,6 +303,7 @@ struct pmu {
struct module *module;
struct device *dev;
+ struct device *parent;
const struct attribute_group **attr_groups;
const struct attribute_group **attr_update;
const char *name;
@@ -11367,6 +11367,7 @@ static int pmu_dev_alloc(struct pmu *pmu)
dev_set_drvdata(pmu->dev, pmu);
pmu->dev->bus = &pmu_bus;
+ pmu->dev->parent = pmu->parent;
pmu->dev->release = pmu_dev_release;
ret = dev_set_name(pmu->dev, "%s", pmu->name);