[PATCH bpf-next v2 7/8] bpf: Replace __diag_ignore with unified __diag_ignore_all

[Kumar Kartikeya Dwivedi <memxor@xxxxxxxxx>]

Currently, -Wmissing-prototypes warning is ignored for GCC, but not
clang. This leads to clang builds warning on W=1 mode. Since the flag
used by both compilers is same, we can use the unified __diag_ignore_all
macro that works for all supported versions and compilers which have
__diag macro support (currently GCC >= 8.0, and Clang >= 11.0).

Also add nf_conntrack_bpf.h include to prevent missing prototype warning
for register_nf_conntrack_bpf.

Cc: netfilter-devel@xxxxxxxxxxxxxxx
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@xxxxxxxxx>
---
 net/bpf/test_run.c               | 4 ++--
 net/netfilter/nf_conntrack_bpf.c | 5 +++--
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/net/bpf/test_run.c b/net/bpf/test_run.c
index eb129e48f90b..fcc83017cd03 100644
--- a/net/bpf/test_run.c
+++ b/net/bpf/test_run.c
@@ -201,8 +201,8 @@ static int bpf_test_finish(const union bpf_attr *kattr,
  * future.
  */
 __diag_push();
-__diag_ignore(GCC, 8, "-Wmissing-prototypes",
-	      "Global functions as their definitions will be in vmlinux BTF");
+__diag_ignore_all("-Wmissing-prototypes",
+		  "Global functions as their definitions will be in vmlinux BTF");
 int noinline bpf_fentry_test1(int a)
 {
 	return a + 1;
diff --git a/net/netfilter/nf_conntrack_bpf.c b/net/netfilter/nf_conntrack_bpf.c
index 8ad3f52579f3..fe98673dd5ac 100644
--- a/net/netfilter/nf_conntrack_bpf.c
+++ b/net/netfilter/nf_conntrack_bpf.c
@@ -12,6 +12,7 @@
 #include <linux/btf_ids.h>
 #include <linux/net_namespace.h>
 #include <net/netfilter/nf_conntrack.h>
+#include <net/netfilter/nf_conntrack_bpf.h>
 #include <net/netfilter/nf_conntrack_core.h>
 
 /* bpf_ct_opts - Options for CT lookup helpers
@@ -102,8 +103,8 @@ static struct nf_conn *__bpf_nf_ct_lookup(struct net *net,
 }
 
 __diag_push();
-__diag_ignore(GCC, 8, "-Wmissing-prototypes",
-	      "Global functions as their definitions will be in nf_conntrack BTF");
+__diag_ignore_all("-Wmissing-prototypes",
+		  "Global functions as their definitions will be in nf_conntrack BTF");
 
 /* bpf_xdp_ct_lookup - Lookup CT entry for the given tuple, and acquire a
  *		       reference to it
-- 
2.35.1