On Sat, 9 Sep 2023 00:33:05 +0100 Mark Brown broonie@kernel.org wrote:
On Fri, Sep 08, 2023 at 08:19:16PM +0000, Beau Belgrave wrote:
Add common methods to detect if tracefs and user_events is enabled. If either is not enabled skip the test. If tracefs is enabled, but is not mounted, mount tracefs and fail if there were any errors. Fail if not run as root.
This will leave tracefs mounted if it was not already mounted which is a change to the system configuration. While that may happen if things go wrong during a test we should probably avoid actively doing this and either only skip or try to umount at the end of the test if we mounted ourselves.
LOL! Beau just asked me yesterday if anyone would care if the test mounted tracefs and left it mounted. I told him "no" as ftracetest in the selftests already do that.
I guess I was wrong and some people do care ;-)
-- Steve