Re: [PATCH v3] bpf: fix build warning - missing prototype
From: Daniel Borkmann <daniel@iogearbox.net>
Date: 2020-03-27 20:34:12
Also in:
bpf, kernel-janitors, lkml
On 3/27/20 8:55 AM, Jean-Philippe Menil wrote:
Fix build warnings when building net/bpf/test_run.o with W=1 due
to missing prototype for bpf_fentry_test{1..6}.
Instead of declaring prototypes, turn off warnings with
__diag_{push,ignore,pop} as pointed by Alexei.
Signed-off-by: Jean-Philippe Menil <redacted>Looks better, but this doesn't apply cleanly. Please respin to latest bpf-next tree, thanks.
quoted hunk ↗ jump to hunk
--- net/bpf/test_run.c | 5 +++++ 1 file changed, 5 insertions(+)diff --git a/net/bpf/test_run.c b/net/bpf/test_run.c index d555c0d8657d..cc1592413fc3 100644 --- a/net/bpf/test_run.c +++ b/net/bpf/test_run.c@@ -113,6 +113,9 @@ static int bpf_test_finish(const union bpf_attr *kattr, * architecture dependent calling conventions. 7+ can be supported in the * future. */ +__diag_push(); +__diag_ignore(GCC, 8, "-Wmissing-prototypes", + "Global functions as their definitions will be in vmlinux BTF); int noinline bpf_fentry_test1(int a) { return a + 1;@@ -143,6 +146,8 @@ int noinline bpf_fentry_test6(u64 a, void *b, short c, int d, void *e, u64 f) return a + (long)b + c + d + (long)e + f; } +__diag_pop(); + static void *bpf_test_init(const union bpf_attr *kattr, u32 size, u32 headroom, u32 tailroom) {