linux-kernel - [PATCH 15/19] sunrpc: don't warn for unused variable 'buf'

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Message-Id: <1359153858-31992-16-git-send-email-arnd@arndb.de>
Date:	Fri, 25 Jan 2013 22:44:14 +0000
From:	Arnd Bergmann <arnd@...db.de>
To:	linux-arm-kernel@...ts.infradead.org
Cc:	linux-kernel@...r.kernel.org, Arnd Bergmann <arnd@...db.de>,
	"J. Bruce Fields" <bfields@...hat.com>,
	Trond Myklebust <Trond.Myklebust@...app.com>,
	linux-nfs@...r.kernel.org, netdev@...r.kernel.org
Subject: [PATCH 15/19] sunrpc: don't warn for unused variable 'buf'

When RPC_DEBUG is unset, the dprintk() macro does nothing,
causing the 'buf' variable in svc_printk to become unused.
Marking it as __maybe_unused avoids a harmless gcc warning.

Without this patch, building at91_dt_defconfig results in:

net/sunrpc/svc.c: In function 'svc_printk':
net/sunrpc/svc.c:1051:7: warning: unused variable 'buf' [-Wunused-variable]

Signed-off-by: Arnd Bergmann <arnd@...db.de>
Cc: "J. Bruce Fields" <bfields@...hat.com>
Cc: Trond Myklebust <Trond.Myklebust@...app.com>
Cc: linux-nfs@...r.kernel.org
Cc: netdev@...r.kernel.org
---
 net/sunrpc/svc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/sunrpc/svc.c b/net/sunrpc/svc.c
index dbf12ac..b1f5223 100644
--- a/net/sunrpc/svc.c
+++ b/net/sunrpc/svc.c
@@ -1047,7 +1047,7 @@ void svc_printk(struct svc_rqst *rqstp, const char *fmt, ...)
 {
 	struct va_format vaf;
 	va_list args;
-	char 	buf[RPC_MAX_ADDRBUFLEN];
+	char buf[RPC_MAX_ADDRBUFLEN] __maybe_unused;
 
 	va_start(args, fmt);
 
-- 
1.8.0

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