kernel/linux.git/tools/testing/selftests/timers/adjtick.c, branch linux-4.16.yLinux kernel stable tree (mirror)https://git.radix-linux.su/kernel/linux.git/atom?h=linux-4.16.y2017-08-22T17:15:59+00:00selftests: timers: drop support for !KTEST case2017-08-22T17:15:59+00:00Shuah Khanshuahkh@osg.samsung.com2017-08-11T16:11:42+00:00urn:sha1:b841065043f996e2bf7648786485f3935625592b
There is no need to keep timers tests in sync with external timers
repo. Drop support for !KTEST to support for building and running
timers tests without kselftest framework.
Reference: https://lkml.org/lkml/2017/8/10/952
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
Acked-by: John Stultz <john.stultz@linaro.org>
timers, kselftest: Add 'adjtick' test to validate adjtimex() tick adjustments2015-10-12T07:51:34+00:00John Stultzjohn.stultz@linaro.org2015-10-06T01:16:57+00:00urn:sha1:6035519fcf5aa17084b41790cdc584d881d82c03
Recently a kernel side NTP bug was fixed via the following commit:
2619d7e9c92d ("time: Fix timekeeping_freqadjust()'s incorrect use of abs() instead of abs64()")
When the bug was reported it was difficult to detect, except by
tweaking the adjtimex tick value, and noticing how quickly the
adjustment took:
https://lkml.org/lkml/2015/9/1/488
Thus this patch introduces a new test which manipulates the
adjtimex tick value and validates that the results are what we
expect.
Signed-off-by: John Stultz <john.stultz@linaro.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Miroslav Lichvar <mlichvar@redhat.com>
Cc: Nuno Gonçalves <nunojpg@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Richard Cochran <richardcochran@gmail.com>
Cc: Shuah Khan <shuahkh@osg.samsung.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1444094217-20258-1-git-send-email-john.stultz@linaro.org
[ Tidied up the code and the changelog a bit. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>