Re: [PATCH] selftests/net: fix unused return value warnings in ksft.h

Hi Jakub,

On 2025-09-10 07:25, Jakub Kicinski wrote:

Sounds good!

I tried the direct void casting approach, but it still generates warnings with GCC 14.2.0: (void)write(fd, msg, sizeof(msg)); still shows: warning: ignoring return value of 'write'...

After further researching, I found this appears to be a known GCC/glibc issue dating back to 2015 where direct void casting doesn't work for functions with __warn_unused_result__. [1] Since this is a long-standing toolchain issue and direct void casting won't suppress warning, I think you can skip this patch. Thank you!

[1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66425

Best Regards, Nai-Chen Cheng