perf/core: move all of the pmu devices into their own location
In sysfs, for some reason, all pmu devices seem to show up in the "root"
of /sys/devices/ making for a confusing mess as these devices are not
really at the root of the system at all.
Create a fake root devices, "pmu_bus" and place them all under there if
they do not already have a parent device set, cleaning up sysfs to look
more sane.
But because not all userspace tools have caught up and were incorrectly
looking in the root of sysfs, create a config option to preserve the old
locations for a few years until they can be properly updated.
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: "Liang, Kan" <kan.liang@linux.intel.com>
Cc: linux-perf-users@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2 files changed
