linux-kernel - [PATCH] staging: gdm724x: Place macro argument within parentheses

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Date:   Wed, 11 Aug 2021 23:41:32 +1000
From:   Dee-Jay Anthony Logozzo <dj@....id.au>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Dee-Jay Anthony Logozzo <dj@....id.au>
Subject: [PATCH] staging: gdm724x: Place macro argument within parentheses

Place the macro arguments within parentheses to avoid precedence issues.
This solves the following checkpatch.pl warnings

CHECK: Macro argument 'len' may be better as '(len)' to avoid precedence issues
+#define ND_NLMSG_S_LEN(len)    (len + ND_IFINDEX_LEN)

CHECK: Macro argument 'nlh' may be better as '(nlh)' to avoid precedence issues
+#define ND_NLMSG_R_LEN(nlh)    (nlh->nlmsg_len - ND_IFINDEX_LEN)

Signed-off-by: Dee-Jay Anthony Logozzo <dj@....id.au>
---
 drivers/staging/gdm724x/netlink_k.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/gdm724x/netlink_k.c b/drivers/staging/gdm724x/netlink_k.c
index 7902e52a699b..8f39cc5617aa 100644
--- a/drivers/staging/gdm724x/netlink_k.c
+++ b/drivers/staging/gdm724x/netlink_k.c
@@ -19,8 +19,8 @@ static DEFINE_MUTEX(netlink_mutex);
 #define ND_NLMSG_SPACE(len)	(NLMSG_SPACE(len) + ND_IFINDEX_LEN)
 #define ND_NLMSG_DATA(nlh)	((void *)((char *)NLMSG_DATA(nlh) + \
 						  ND_IFINDEX_LEN))
-#define ND_NLMSG_S_LEN(len)	(len + ND_IFINDEX_LEN)
-#define ND_NLMSG_R_LEN(nlh)	(nlh->nlmsg_len - ND_IFINDEX_LEN)
+#define ND_NLMSG_S_LEN(len)	((len) + ND_IFINDEX_LEN)
+#define ND_NLMSG_R_LEN(nlh)	((nlh)->nlmsg_len - ND_IFINDEX_LEN)
 #define ND_NLMSG_IFIDX(nlh)	NLMSG_DATA(nlh)
 #define ND_MAX_MSG_LEN		(1024 * 32)
 
-- 
2.31.1