netdev - [PATCH 2/2] btf: Fix error of Macros with multiple statements

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Message-ID: <YryJosfh8z2DhKC0@playground>
Date:   Wed, 29 Jun 2022 18:19:30 +0100
From:   Jules Irenge <jbi.octave@...il.com>
To:     Martin KaFai Lau <kafai@...com>
Cc:     Elana.Copperman@...ileye.com, Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>, netdev@...r.kernel.org,
        bpf@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] btf: Fix error of Macros with multiple statements

This patch fixes an error reported by checkpatch.pl

ERROR: Macros with multiple statements should be
enclosed in a do while loop

To fix this a do while(0) loop is used
to encloses the multiple statements.

Signed-off-by: Jules Irenge <jbi.octave@...il.com>
---
 kernel/bpf/btf.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/kernel/bpf/btf.c b/kernel/bpf/btf.c
index 1bc496162572..95c1ee525e28 100644
--- a/kernel/bpf/btf.c
+++ b/kernel/bpf/btf.c
@@ -5057,8 +5057,10 @@ extern struct btf *btf_vmlinux;
 static union {
 	struct bpf_ctx_convert {
 #define BPF_PROG_TYPE(_id, _name, prog_ctx_type, kern_ctx_type) \
-	prog_ctx_type _id##_prog; \
-	kern_ctx_type _id##_kern;
+		do { \
+			prog_ctx_type _id##_prog; \
+			kern_ctx_type _id##_kern; \
+		} while (0)
 #include <linux/bpf_types.h>
 #undef BPF_PROG_TYPE
 	} *__t;
-- 
2.36.1