selftests: kselftest: Fix build failure with NOLIBC

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@kernel.org>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20240412123536.GA32444@redhat.com
Closes: https://lore.kernel.org/all/f0523b3a-ea08-4615-b0fb-5b504a2d39df@sirena.org.uk/

diff --git a/tools/testing/selftests/kselftest.h b/tools/testing/selftests/kselftest.h
index 0591974b57e0645cae04898f0eb9c02c9b0a5cfa..7b89362da4bfd384efe49681451c276ecd78ee16 100644 (file)
--- a/tools/testing/selftests/kselftest.h
+++ b/tools/testing/selftests/kselftest.h
@@ -395,6 +395,10 @@ static inline __noreturn __printf(1, 2) int ksft_exit_skip(const char *msg, ...)
 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;
 
@@ -402,6 +406,7 @@ static inline int ksft_min_kernel_version(unsigned int min_major,
                ksft_exit_fail_msg("Can't parse kernel version\n");
 
        return major > min_major || (major == min_major && minor >= min_minor);
+#endif
 }
 
 #endif /* __KSELFTEST_H */