[bpf-next] bpf: handle implicit declaration of function gettid in bpf_iter.c

Commit Message

Jason Xing Oct. 28, 2024, 3:41 a.m. UTC

From: Jason Xing <[e-mail]>

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

Adding a define to fix it (referring to
tools/perf/tests/shell/coresight/thread_loop/thread_loop.c file.

Signed-off-by: Jason Xing <[e-mail]>
---
 tools/testing/selftests/bpf/prog_tests/bpf_iter.c | 2 ++
 1 file changed, 2 insertions(+)

Patch

diff --git a/tools/testing/selftests/bpf/prog_tests/bpf_iter.c b/tools/testing/selftests/bpf/prog_tests/bpf_iter.c
index f0a3a9c18e9e..a105759f3dcf 100644
--- a/tools/testing/selftests/bpf/prog_tests/bpf_iter.c
+++ b/tools/testing/selftests/bpf/prog_tests/bpf_iter.c
@@ -34,6 +34,8 @@ 
 #include "bpf_iter_ksym.skel.h"
 #include "bpf_iter_sockmap.skel.h"
 
+#define gettid() syscall(SYS_gettid)
+
 static void test_btf_id_or_null(void)
 {
 	struct bpf_iter_test_kern3 *skel;