netdev - [PATCH, net-next 1/2] bpf: btf: avoid -Wreturn-type warning

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Message-Id: <20180525213331.2115471-1-arnd@arndb.de>
Date:   Fri, 25 May 2018 23:33:19 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>
Cc:     Arnd Bergmann <arnd@...db.de>, Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH, net-next 1/2] bpf: btf: avoid -Wreturn-type warning

gcc warns about a noreturn function possibly returning in
some configurations:

kernel/bpf/btf.c: In function 'env_type_is_resolve_sink':
kernel/bpf/btf.c:729:1: error: control reaches end of non-void function [-Werror=return-type]

Using BUG() instead of BUG_ON() avoids that warning and otherwise
does the exact same thing.

Fixes: eb3f595dab40 ("bpf: btf: Validate type reference")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 kernel/bpf/btf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/bpf/btf.c b/kernel/bpf/btf.c
index 9cbeabb5aca3..2822a0cf4f48 100644
--- a/kernel/bpf/btf.c
+++ b/kernel/bpf/btf.c
@@ -749,7 +749,7 @@ static bool env_type_is_resolve_sink(const struct btf_verifier_env *env,
 			!btf_type_is_array(next_type) &&
 			!btf_type_is_struct(next_type);
 	default:
-		BUG_ON(1);
+		BUG();
 	}
 }
 
-- 
2.9.0