diff options
| author | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2023-05-26 10:58:20 +0100 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2023-05-30 11:20:35 -0700 |
| commit | 143f83e2003a4c3ca0c2558254129569048e0759 (patch) | |
| tree | 2305ed087960abbb2a0c6f2203d6cfcb65b1d51c | |
| parent | 7877cb91f1081754a1487c144d85dc0d2e2e7fc4 (diff) | |
perf: Allow a PMU to have a parent
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.
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://lore.kernel.org/r/20230526095824.16336-2-Jonathan.Cameron@huawei.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
| -rw-r--r-- | include/linux/perf_event.h | 1 | ||||
| -rw-r--r-- | kernel/events/core.c | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index d5628a7b5eaa..b99db1eda72c 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -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; diff --git a/kernel/events/core.c b/kernel/events/core.c index db016e418931..285cf6ca6e81 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -11379,6 +11379,7 @@ 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); |