kernel/tools/testing/selftests/timers/rtcpie.c, branch linux-6.2.y

selftests: timers: rtcpie: skip test if default RTC device does not exist

2021-06-08T01:18:52Z

This test will require /dev/rtc0, the default RTC device, or one specified by user to run. Since this default RTC is not guaranteed to exist on all of the devices, so check its existence first, otherwise skip this test with the kselftest skip code 4. Without this patch this test will fail like this on a s390x zVM: $ selftests: timers: rtcpie $ /dev/rtc0: No such file or directory not ok 1 selftests: timers: rtcpie # exit=22 With this patch: $ selftests: timers: rtcpie $ Default RTC /dev/rtc0 does not exist. Test Skipped! not ok 9 selftests: timers: rtcpie # SKIP Fixed up change log so "With this patch" text doesn't get dropped. Shuah Khan Signed-off-by: Po-Hsu Lin Signed-off-by: Shuah Khan

selftests: timers: rtcpie: restore previous PIE rate

2018-05-30T21:21:51Z

After the test ends, restore the PIE rate to its previous value to be less disruptive. Signed-off-by: Alexandre Belloni Signed-off-by: Shuah Khan (Samsung OSG)

selftests: timers: move PIE tests out of rtctest

2018-05-30T21:21:51Z

Since commit 6610e0893b8bc ("RTC: Rework RTC code to use timerqueue for events"), PIE are completely handled using hrtimers, without actually using any underlying hardware RTC. Move PIE testing out of rtctest. It still depends on the presence of an RTC (to access the device file) but doesn't depend on it actually working. Signed-off-by: Alexandre Belloni Signed-off-by: Shuah Khan (Samsung OSG)