linux-kernel - [PATCH] bpf: fix: symbol 'btf

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Message-Id: <1608796848-49865-1-git-send-email-abaci-bugfix@linux.alibaba.com>
Date:   Thu, 24 Dec 2020 16:00:48 +0800
From:   YANG LI <abaci-bugfix@...ux.alibaba.com>
To:     ast@...nel.org
Cc:     daniel@...earbox.net, andrii@...nel.org, kafai@...com,
        songliubraving@...com, yhs@...com, john.fastabend@...il.com,
        kpsingh@...nel.org, davem@...emloft.net, kuba@...nel.org,
        hawk@...nel.org, natechancellor@...il.com, ndesaulniers@...gle.com,
        netdev@...r.kernel.org, bpf@...r.kernel.org,
        linux-kernel@...r.kernel.org, clang-built-linux@...glegroups.com,
        YANG LI <abaci-bugfix@...ux.alibaba.com>
Subject: [PATCH] bpf: fix: symbol 'btf_vmlinux' was not declared.

Symbol 'btf_vmlinux' was not declared in the header file and does not 
add extern, so no other file uses it. It's better to add static to it.

Signed-off-by: YANG LI <abaci-bugfix@...ux.alibaba.com>
Reported-by: Abaci <abaci@...ux.alibaba.com>
---
 kernel/bpf/verifier.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index 17270b8..535d364 100644
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -244,7 +244,7 @@ struct bpf_call_arg_meta {
 	u32 ret_btf_id;
 };
 
-struct btf *btf_vmlinux;
+static struct btf *btf_vmlinux;
 
 static DEFINE_MUTEX(bpf_verifier_lock);
 
-- 
1.8.3.1