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charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Authenticated-Sender: marcus.wichelmann@hetzner-cloud.de X-Virus-Scanned: Clear (ClamAV 1.0.7/27557/Sat Feb 22 10:28:44 2025) Am 21.02.25 um 19:26 schrieb Andrii Nakryiko: > On Fri, Feb 21, 2025 at 7:01 AM Marcus Wichelmann > wrote: >> >> Hi, >> >> I'm not sure what I'm doing wrong, but after rebasing on latest bpf-next >> which includes this patch, I'm no longer able to build the bpf selftests: >> >> # pushd tools/testing/selftests/bpf/ >> # make -j80 >> [...] >> GEN-SKEL [test_progs] bpf_iter_task_vmas.skel.h >> CLNG-BPF [test_progs] bpf_iter_tasks.bpf.o >> progs/bpf_iter_tasks.c:98:8: error: call to undeclared function 'bpf_copy_from_user_task_str'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] >> 98 | ret = bpf_copy_from_user_task_str((char *)task_str1, sizeof(task_str1), ptr, task, 0); >> | ^ >> 1 error generated. >> make: *** [Makefile:733: /root/linux/tools/testing/selftests/bpf/bpf_iter_tasks.bpf.o] Error 1 >> >> I suppose the function definition should be in the vmlinux.h? >> > > Yes, it should be in vmlinux.h, and if you don't have it, then you > must have a bit too old pahole. > > $ git tag --contains ce4d0bc0200e3 > v1.27 > v1.28 Ah, my pahole version was 1.25. Compiling a newer version from source did the trick. This was really the last thing I would have thought of. Thank you very much for your help! Marcus