Re: [PATCH v3] selftests/mm: add process_madvise() tests

Hi Zi Yan, Thanks for testing the patch and reporting this build failure. I don't have an arm64 environment readily available for testing, so I appreciate you catching this. I suspect this is caused by missing or older userspace headers in the cross-compilation toolchain. I will try to fix this in the next version. If the problem persists, a good solution would be to manually define the syscall wrapper to avoid the dependency on <sys/pidfd.h>. I'll send out a v4 with a fix. Thanks again for your help. Best regards, Wang Lian