6.8-stable review patch. If anyone has any objections, please let me know. ------------------ From: Oleg Nesterov <oleg@xxxxxxxxxx> commit 16767502aa990cca2cb7d1372b31d328c4c85b40 upstream. As Mark explains ksft_min_kernel_version() can't be compiled with nolibc, it doesn't implement uname(). Fixes: 6d029c25b71f ("selftests/timers/posix_timers: Reimplement check_timer_distribution()") Reported-by: Mark Brown <broonie@xxxxxxxxxx> Signed-off-by: Oleg Nesterov <oleg@xxxxxxxxxx> Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Link: https://lore.kernel.org/r/20240412123536.GA32444@xxxxxxxxxx Closes: https://lore.kernel.org/all/f0523b3a-ea08-4615-b0fb-5b504a2d39df@xxxxxxxxxxxxx/ Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- tools/testing/selftests/kselftest.h | 5 +++++ 1 file changed, 5 insertions(+) --- a/tools/testing/selftests/kselftest.h +++ b/tools/testing/selftests/kselftest.h @@ -350,6 +350,10 @@ static inline __noreturn __printf(1, 2) static inline int ksft_min_kernel_version(unsigned int min_major, unsigned int min_minor) { +#ifdef NOLIBC + ksft_print_msg("NOLIBC: Can't check kernel version: Function not implemented\n"); + return 0; +#else unsigned int major, minor; struct utsname info; @@ -357,6 +361,7 @@ static inline int ksft_min_kernel_versio ksft_exit_fail_msg("Can't parse kernel version\n"); return major > min_major || (major == min_major && minor >= min_minor); +#endif } #endif /* __KSELFTEST_H */