From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755655AbdERNhq (ORCPT ); Thu, 18 May 2017 09:37:46 -0400 Received: from mout.kundenserver.de ([212.227.126.131]:65323 "EHLO mout.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755286AbdERNhl (ORCPT ); Thu, 18 May 2017 09:37:41 -0400 From: Arnd Bergmann To: Takashi Iwai Cc: Arnd Bergmann , Jaroslav Kysela , alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org Subject: [PATCH 1/2] ALSA: pcm: use "do {} while (0)" for empty macro Date: Thu, 18 May 2017 15:35:54 +0200 Message-Id: <20170518133610.1914235-1-arnd@arndb.de> X-Mailer: git-send-email 2.9.0 X-Provags-ID: V03:K0:IlafpS9osvFS2tAnYKINI0q03k7wq6tm0KoVYqu+YSjiOn+e8iB /swLRJpU4cKRJj239OmQ6KyJVOmXfoLP52D+nqArg+wY3b84ypD0zrS/rW2M1eXDAaEof5Y BiqRyDjdRW9hDCWdTcMhxCH1IFC3bfmDUlvubl57tlU0WEop9SvkBzLAhBb4Cfp9sNpr7oU qaK9ppEFVCO9e4/Ghp2uQ== X-UI-Out-Filterresults: notjunk:1;V01:K0:mGLdsMW0LSg=:fw/tQbxWmAOWabErHblGja rsqS/ifE7Ytzq35ru6FtNPIG70eEIfDB1xvyj3dKyBXulzDhT4HHGQgb9xcgC/ACdZV6WeKRJ x+du7KnU1tEc6SoLoCh2yUf8PvSu2FekIR8350Mf/BDchzsL25IQ9z8vUA0an6ghtmb6JrPCw 61p502qU3T5kBDGN4zzWmG7/OdABobdwd2xASFNF+Qwf4DGT4M438ZzANO8JaW3g50vf8Zwi5 6XE2T6Rjv/oq1jIw3EntbhnRkIeQd1XUPllTkUiHhzY/OQ2jTl/lxZzRtQhso3ihW1K863/Ud Y8h0WwYuFTDO8u3/5SYE8XgCHUfy8kTc8clZaX77tvo3unad8+O7MbiuR4kRxHfnQ4+G+UzYp z3i4hDMGsxUeyf2IX5WX0/VpeLp/AW5KnBkyvRohnm6NFH0UC9tnW5geZLjyMDewkuX8MOTpC 5bv6FQjkOeGM5rCeAKUZ/z3AGdxCbykZbr8GpIP5n5ndrVjvW4zTp7ZV6t076ViXUMswscFMr STRB3KrSxBI1IbDHwDA53f+r7h1qycZ6jaUvVBYL1paFBWc8quaWq2ZpSay6esUkf72vr0ZiY +q+PvVcxF+Xh0ZDYqNGdu43IIhWRDIyUvjQx4BaJlssFqRCVhpsBSjBWIp0V9DgrfG6Xo0Hom 1MUhl58eTsam2Tiu1PObFO18zomgtgDB4Jspo851uHk523k2rX35pDDyT/8Aw7s5U2jE= Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Recent compilers produce a harmless warning for the new pcm_call_notify() macro when CONFIG_SND_PCM_OSS is disabled: sound/core/pcm.c: In function 'snd_pcm_free': sound/core/pcm.c:905:37: error: suggest braces around empty body in an 'if' statement [-Werror=empty-body] This turns the empty macro into a 'do {} while (0)' statement to avoid the warning. Fixes: 58f30d650c7f ("ALSA: pcm: Build pcm notifier code conditionally") Signed-off-by: Arnd Bergmann --- sound/core/pcm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/sound/core/pcm.c b/sound/core/pcm.c index 24acbfb5c531..d30dba0ee688 100644 --- a/sound/core/pcm.c +++ b/sound/core/pcm.c @@ -894,7 +894,7 @@ static void snd_pcm_free_stream(struct snd_pcm_str * pstr) _notify->call(pcm); \ } while (0) #else -#define pcm_call_notify(pcm, call) /* NOP */ +#define pcm_call_notify(pcm, call) do {} while (0) #endif static int snd_pcm_free(struct snd_pcm *pcm) -- 2.9.0