linux-kernel - [patch] IA64: suppress return value of down_trylock() in salinfo_work_to

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-next>] [day] [month] [year] [list]

Date:	Sun, 3 Aug 2008 10:06:58 +1000
From:	Simon Horman <horms@...ge.net.au>
To:	linux-ia64@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:	Tony Luck <tony.luck@...el.com>, Keith Owens <kaos@....com.au>
Subject: [patch] IA64: suppress return value of down_trylock() in
	salinfo_work_to_do()

salinfo_work_to_do() intentionally ignores the return value of
down_trylock() and calls up() regardless of if the lock
was taken or not.

This patch suppresses the warning generated by ignoring
this return value - down_trylock() is annotated with __must_check.

(void)down_trylock() was not sufficient.

arch/ia64/kernel/salinfo.c: In function `salinfo_work_to_do':
arch/ia64/kernel/salinfo.c:195: warning: ignoring return value of `down_trylock'

# ia64-unknown-linux-gnu-gcc --version
ia64-unknown-linux-gnu-gcc (GCC) 3.4.5
Copyright (C) 2004 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Signed-off-by: Simon Horman <horms@...ge.net.au>

Index: linux-2.6/arch/ia64/kernel/salinfo.c
===================================================================
--- linux-2.6.orig/arch/ia64/kernel/salinfo.c	2008-08-03 09:52:08.000000000 +1000
+++ linux-2.6/arch/ia64/kernel/salinfo.c	2008-08-03 10:03:36.000000000 +1000
@@ -192,7 +192,7 @@ struct salinfo_platform_oemdata_parms {
 static void
 salinfo_work_to_do(struct salinfo_data *data)
 {
-	down_trylock(&data->mutex);
+	if (down_trylock(&data->mutex)) { ; }; /* Ignore return value */
 	up(&data->mutex);
 }

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/