Hi Shuah, On 2/12/20 12:35 AM, shuah wrote: > The following tests fail to build on x86_64 [..] > timerns: > > tools/testing/selftests/timens' > gcc -Wall -Werror -pthread -lrt -ldl timens.c -o > tools/testing/selftests/timens/timens > /usr/bin/ld: /tmp/ccGy5CST.o: in function `check_config_posix_timers': > timens.c:(.text+0x65a): undefined reference to `timer_create' > collect2: error: ld returned 1 exit status I've just send a patch to fix it: https://lkml.kernel.org/r/20200212140040.126747-1-dima@xxxxxxxxxx Could you try it? Also, it seems that the same thing affects futex/rtc/tcp_mmap/tcp_inq tests? While looking into this, I see there are new auto-generated lkmdtm && pidfd tests, is it worth to add them to .gitignore? Thanks, Dmitry