Patchwork [15/19] sunrpc: don't warn for unused variable 'buf'

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Submitter Arnd Bergmann
Date Jan. 25, 2013, 2:14 p.m.
Message ID <>
Download mbox | patch
Permalink /patch/215743/
State Not Applicable
Delegated to: David Miller
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Arnd Bergmann - Jan. 25, 2013, 2:14 p.m.
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 <>
Cc: "J. Bruce Fields" <>
Cc: Trond Myklebust <>
 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);