Am 21.02.25 um 19:26 schrieb Andrii Nakryiko:
On Fri, Feb 21, 2025 at 7:01 AM Marcus Wichelmann <marcus.wichelmann@xxxxxxxxxxxxxxxx> 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
