linux-kernel - [PATCH 10/13] selftests: net: Work around build error seen with -Werror

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20251204161729.2448052-11-linux@roeck-us.net>
Date: Thu,  4 Dec 2025 08:17:24 -0800
From: Guenter Roeck <linux@...ck-us.net>
To: Shuah Khan <shuah@...nel.org>
Cc: Christian Brauner <brauner@...nel.org>,
	Elizabeth Figura <zfigura@...eweavers.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Kees Cook <kees@...nel.org>,
	linux-kernel@...r.kernel.org,
	linux-kselftest@...r.kernel.org,
	wine-devel@...ehq.org,
	netdev@...r.kernel.org,
	bpf@...r.kernel.org,
	Guenter Roeck <linux@...ck-us.net>,
	Joe Damato <jdamato@...tly.com>
Subject: [PATCH 10/13] selftests: net: Work around build error seen with -Werror

Fix

ksft.h: In function ‘ksft_ready’:
ksft.h:27:9: error: ignoring return value of ‘write’ declared with attribute ‘warn_unused_result’

ksft.h: In function ‘ksft_wait’:
ksft.h:51:9: error: ignoring return value of ‘read’ declared with attribute ‘warn_unused_result’

by checking and then ignoring the return value of the affected functions.

Fixes: 2b6d490b82668 ("selftests: drv-net: Factor out ksft C helpers")
Cc: Joe Damato <jdamato@...tly.com>
Signed-off-by: Guenter Roeck <linux@...ck-us.net>
---
 tools/testing/selftests/net/lib/ksft.h | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/net/lib/ksft.h b/tools/testing/selftests/net/lib/ksft.h
index 17dc34a612c6..b3d3f7e28e98 100644
--- a/tools/testing/selftests/net/lib/ksft.h
+++ b/tools/testing/selftests/net/lib/ksft.h
@@ -24,7 +24,8 @@ static inline void ksft_ready(void)
 		fd = STDOUT_FILENO;
 	}
 
-	write(fd, msg, sizeof(msg));
+	if (write(fd, msg, sizeof(msg)))
+		;
 	if (fd != STDOUT_FILENO)
 		close(fd);
 }
@@ -48,7 +49,8 @@ static inline void ksft_wait(void)
 		fd = STDIN_FILENO;
 	}
 
-	read(fd, &byte, sizeof(byte));
+	if (read(fd, &byte, sizeof(byte)))
+		;
 	if (fd != STDIN_FILENO)
 		close(fd);
 }
-- 
2.43.0