From: Jonathan Cameron Date: Fri, 26 May 2023 09:58:20 +0000 (+0100) Subject: perf: Allow a PMU to have a parent X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=143f83e2003a4c3ca0c2558254129569048e0759;p=linux.git 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 Reviewed-by: Greg Kroah-Hartman Acked-by: Peter Zijlstra (Intel) Signed-off-by: Jonathan Cameron Link: https://lore.kernel.org/r/20230526095824.16336-2-Jonathan.Cameron@huawei.com Signed-off-by: Dan Williams --- diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index d5628a7b5eaac..b99db1eda72cc 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 db016e4189319..285cf6ca6e81a 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);