* [PATCH net-next] af_llc: fix if-statement empty body warning
@ 2020-02-26 5:08 Randy Dunlap
2020-02-27 4:38 ` David Miller
0 siblings, 1 reply; 2+ messages in thread
From: Randy Dunlap @ 2020-02-26 5:08 UTC (permalink / raw)
To: netdev, David Miller
From: Randy Dunlap <rdunlap@infradead.org>
When debugging via dprintk() is not enabled, make the dprintk()
macro be an empty do-while loop, as is done in
<linux/sunrpc/debug.h>.
This fixes a gcc warning when -Wextra is set:
../net/llc/af_llc.c:974:51: warning: suggest braces around empty body in an ‘if’ statement [-Wempty-body]
I have verified that there is not object code change (with gcc 7.5.0).
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: netdev@vger.kernel.org
Cc: "David S. Miller" <davem@davemloft.net>
---
net/llc/af_llc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- linux-next-20200225.orig/net/llc/af_llc.c
+++ linux-next-20200225/net/llc/af_llc.c
@@ -47,7 +47,7 @@ static int llc_ui_wait_for_busy_core(str
#if 0
#define dprintk(args...) printk(KERN_DEBUG args)
#else
-#define dprintk(args...)
+#define dprintk(args...) do {} while (0)
#endif
/* Maybe we'll add some more in the future. */
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [PATCH net-next] af_llc: fix if-statement empty body warning
2020-02-26 5:08 [PATCH net-next] af_llc: fix if-statement empty body warning Randy Dunlap
@ 2020-02-27 4:38 ` David Miller
0 siblings, 0 replies; 2+ messages in thread
From: David Miller @ 2020-02-27 4:38 UTC (permalink / raw)
To: rdunlap; +Cc: netdev
From: Randy Dunlap <rdunlap@infradead.org>
Date: Tue, 25 Feb 2020 21:08:52 -0800
> From: Randy Dunlap <rdunlap@infradead.org>
>
> When debugging via dprintk() is not enabled, make the dprintk()
> macro be an empty do-while loop, as is done in
> <linux/sunrpc/debug.h>.
>
> This fixes a gcc warning when -Wextra is set:
> ../net/llc/af_llc.c:974:51: warning: suggest braces around empty body in an ‘if’ statement [-Wempty-body]
>
> I have verified that there is not object code change (with gcc 7.5.0).
>
> Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Applied.
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