linux-kernel - [PATCH] selftests: net: csum: Fix printk format in recv_get_packet_csum

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Message-ID: <b0e24fd07302aac492d03d0bcd30626a338f976f.1768326133.git.chleroy@kernel.org>
Date: Tue, 13 Jan 2026 18:44:19 +0100
From: "Christophe Leroy (CS GROUP)" <chleroy@...nel.org>
To: "David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Simon Horman <horms@...nel.org>,
	Shuah Khan <shuah@...nel.org>,
	Willem de Bruijn <willemb@...gle.com>
Cc: "Christophe Leroy (CS GROUP)" <chleroy@...nel.org>,
	netdev@...r.kernel.org,
	linux-kselftest@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] selftests: net: csum: Fix printk format in recv_get_packet_csum_status()


  CC       csum
csum.c: In function 'recv_get_packet_csum_status':
csum.c:710:50: warning: format '%lu' expects argument of type 'long unsigned int', but argument 4 has type 'size_t' {aka 'unsigned int'} [-Wformat=]
  710 |                         error(1, 0, "cmsg: len=%lu expected=%lu",
      |                                                ~~^
      |                                                  |
      |                                                  long unsigned int
      |                                                %u
  711 |                               cm->cmsg_len, CMSG_LEN(sizeof(struct tpacket_auxdata)));
      |                               ~~~~~~~~~~~~
      |                                 |
      |                                 size_t {aka unsigned int}
csum.c:710:63: warning: format '%lu' expects argument of type 'long unsigned int', but argument 5 has type 'unsigned int' [-Wformat=]
  710 |                         error(1, 0, "cmsg: len=%lu expected=%lu",
      |                                                             ~~^
      |                                                               |
      |                                                               long unsigned int
      |                                                             %u

Correct format from %lu to %u for both.

Fixes: 91a7de85600d ("selftests/net: add csum offload test")
Signed-off-by: Christophe Leroy (CS GROUP) <chleroy@...nel.org>
---
 tools/testing/selftests/net/lib/csum.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/net/lib/csum.c b/tools/testing/selftests/net/lib/csum.c
index 27437590eeb53..9bcd7394b3043 100644
--- a/tools/testing/selftests/net/lib/csum.c
+++ b/tools/testing/selftests/net/lib/csum.c
@@ -707,7 +707,7 @@ static uint32_t recv_get_packet_csum_status(struct msghdr *msg)
 			      cm->cmsg_level, cm->cmsg_type);
 
 		if (cm->cmsg_len != CMSG_LEN(sizeof(struct tpacket_auxdata)))
-			error(1, 0, "cmsg: len=%lu expected=%lu",
+			error(1, 0, "cmsg: len=%u expected=%u",
 			      cm->cmsg_len, CMSG_LEN(sizeof(struct tpacket_auxdata)));
 
 		aux = (void *)CMSG_DATA(cm);
-- 
2.49.0