On 29/10/2024 07:46, Jason Xing wrote: > From: Jason Xing <kernelxing@xxxxxxxxxxx> > > As we can see from the title, when I compiled the selftests/bpf, I > saw the error: > implicit declaration of function ‘gettid’ ; did you mean ‘getgid’? [-Werror=implicit-function-declaration] > skel->bss->tid = gettid(); > ^~~~~~ > getgid > > Directly call the syscall solves this issue. > > Signed-off-by: Jason Xing <kernelxing@xxxxxxxxxxx> Reviewed-by: Alan Maguire <alan.maguire@xxxxxxxxxx> Tested-by: Alan Maguire <alan.maguire@xxxxxxxxxx> > --- > v2 > Link: https://lore.kernel.org/all/20241028034143.14675-1-kerneljasonxing@xxxxxxxxx/ > 1. directly call the syscall (Andrii) > --- > tools/testing/selftests/bpf/prog_tests/bpf_iter.c | 6 +++--- > 1 file changed, 3 insertions(+), 3 deletions(-) > > diff --git a/tools/testing/selftests/bpf/prog_tests/bpf_iter.c b/tools/testing/selftests/bpf/prog_tests/bpf_iter.c > index f0a3a9c18e9e..9006549a1294 100644 > --- a/tools/testing/selftests/bpf/prog_tests/bpf_iter.c > +++ b/tools/testing/selftests/bpf/prog_tests/bpf_iter.c > @@ -226,7 +226,7 @@ static void test_task_common_nocheck(struct bpf_iter_attach_opts *opts, > ASSERT_OK(pthread_create(&thread_id, NULL, &do_nothing_wait, NULL), > "pthread_create"); > > - skel->bss->tid = gettid(); > + skel->bss->tid = syscall(SYS_gettid); > > do_dummy_read_opts(skel->progs.dump_task, opts); > > @@ -255,10 +255,10 @@ static void *run_test_task_tid(void *arg) > union bpf_iter_link_info linfo; > int num_unknown_tid, num_known_tid; > > - ASSERT_NEQ(getpid(), gettid(), "check_new_thread_id"); > + ASSERT_NEQ(getpid(), syscall(SYS_gettid), "check_new_thread_id"); > > memset(&linfo, 0, sizeof(linfo)); > - linfo.task.tid = gettid(); > + linfo.task.tid = syscall(SYS_gettid); > opts.link_info = &linfo; > opts.link_info_len = sizeof(linfo); > test_task_common(&opts, 0, 1);
