[PATCH 5.13 038/127] dccp: add do-while-0 stubs for dccp_pr_debug macros

From: Sasha Levin
Date: Tue Aug 24 2021 - 12:58:15 EST

From: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>

[ Upstream commit 86aab09a4870bb8346c9579864588c3d7f555299 ]

GCC complains about empty macros in an 'if' statement, so convert
them to 'do {} while (0)' macros.

Fixes these build warnings:

net/dccp/output.c: In function 'dccp_xmit_packet':
../net/dccp/output.c:283:71: warning: suggest braces around empty body in an 'if' statement [-Wempty-body]
283 | dccp_pr_debug("transmit_skb() returned err=%d\n", err);
net/dccp/ackvec.c: In function 'dccp_ackvec_update_old':
../net/dccp/ackvec.c:163:80: warning: suggest braces around empty body in an 'else' statement [-Wempty-body]
163 | (unsigned long long)seqno, state);

Fixes: dc841e30eaea ("dccp: Extend CCID packet dequeueing interface")
Fixes: 380240864451 ("dccp ccid-2: Update code for the Ack Vector input/registration routine")
Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Cc: dccp@xxxxxxxxxxxxxxx
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Cc: Jakub Kicinski <kuba@xxxxxxxxxx>
Cc: Gerrit Renker <gerrit@xxxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
net/dccp/dccp.h | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/net/dccp/dccp.h b/net/dccp/dccp.h
index 9cc9d1ee6cdb..c5c1d2b8045e 100644
--- a/net/dccp/dccp.h
+++ b/net/dccp/dccp.h
@@ -41,9 +41,9 @@ extern bool dccp_debug;
#define dccp_pr_debug_cat(format, a...) DCCP_PRINTK(dccp_debug, format, ##a)
#define dccp_debug(fmt, a...) dccp_pr_debug_cat(KERN_DEBUG fmt, ##a)
-#define dccp_pr_debug(format, a...)
-#define dccp_pr_debug_cat(format, a...)
-#define dccp_debug(format, a...)
+#define dccp_pr_debug(format, a...) do {} while (0)
+#define dccp_pr_debug_cat(format, a...) do {} while (0)
+#define dccp_debug(format, a...) do {} while (0)

extern struct inet_hashinfo dccp_hashinfo;