Messages in this thread Patch in this message | | | From | Jonathan Cameron <> | Subject | [PATCH v6 1/5] perf: Allow a PMU to have a parent | Date | Thu, 13 Apr 2023 15:26:13 +0100 |
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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> Reviewed-by: Dan Williams <dan.j.williams@intel.com> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- v6: No change v5: Move to head of series as may merge as part of: https://lore.kernel.org/all/20230404134225.13408-1-Jonathan.Cameron@huawei.com/ --- include/linux/perf_event.h | 1 + kernel/events/core.c | 1 + 2 files changed, 2 insertions(+)
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 435815d3be3f..32079a332480 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -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); -- 2.37.2
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