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bpf: handle implicit declaration of function gettid in bpf_iter.c

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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@tencent.com>
Reviewed-by: Alan Maguire <alan.maguire@oracle.com>
Tested-by: Alan Maguire <alan.maguire@oracle.com>
Link: https://lore.kernel.org/r/20241029074627.80289-1-kerneljasonxing@gmail.com
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
This commit is contained in:
Jason Xing 2024-10-29 15:46:27 +08:00 committed by Martin KaFai Lau
parent 87cb58aebd
commit 42602e3a06
1 changed files with 3 additions and 3 deletions
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6
tools/testing/selftests/bpf/prog_tests/bpf_iter.c
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@ -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);