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af_llc: fix if-statement empty body warning

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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>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Randy Dunlap 2020-02-25 21:08:52 -08:00 committed by David S. Miller
parent 165b94ffcf
commit c535f92032
1 changed files with 1 additions and 1 deletions
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net/llc/af_llc.c
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@ -47,7 +47,7 @@ static int llc_ui_wait_for_busy_core(struct sock *sk, long timeout);
#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. */