From patchwork Thu May 18 13:35:54 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arnd Bergmann X-Patchwork-Id: 100107 Delivered-To: patch@linaro.org Received: by 10.140.96.100 with SMTP id j91csp724912qge; Thu, 18 May 2017 06:37:57 -0700 (PDT) X-Received: by 10.84.198.36 with SMTP id o33mr5079386pld.145.1495114676963; Thu, 18 May 2017 06:37:56 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1495114676; cv=none; d=google.com; s=arc-20160816; b=hroxNBRsx6vs7HHztHXiW0lJRa2lad1kxxBIaPn7ZBLOut1q1a8xr0YmQDCZ9VyQCL vahmgzRzOmBJToqyUuGEEp4M7Se0XgdELzPB5Dn3ixoNKHiJKegoWCUoDmz01r6P/0Vc NBvNtSPMJZBJUUcxb9PsN81LfdLkWi2QLbf+e34eov3TlaDluyvbOn8vPnFFIEfrQED7 jl2cRa+8ABMDCklF2jf0xWdTAAQgfB31ASqJZ6kDzmU8HVx5V98WILqeWnPDMyb37Buf PpoqmrYU39rVNSapYWCJmGlmMoUGG0qBO9kGiT9eXPQqmOfYIbCxa1IgGiuGxdffvVlb btig== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:message-id:date:subject:cc:to:from :arc-authentication-results; bh=U4bYotOM72jTN4Pe7GqtOTyWE0FRh3iEkzqQsvd7hz0=; b=VlJlAQNpe3f4oLf8xihQgbC/c9twOd+3Ia1ZCZ+ofL1sFKZCLvcrseWJ61+2ODI8Un bTNmk5lTAjCzArj/bZyoVFn1Su2cEKQ68stffXh2we2cELTh2oCwbBcuAqnaDcqkASCX IiQOHkLI9cayCs5uhGwJNiT8ke3G+pb/tExUKTNNCFCP6lKXEKZ126wBCOTNbF37fvcM zMO9etfG5fw8Nm/jfeP2aRJELjRv/VyWJEZx8CXk1/gnzdPHwKmjDsQehF6lz8jmsG+l P8iSKl+YsNyW+4EjO3Lb+cu0/WzeIAkjXXxlYKuu/jLlHxW1cjhVsfLwbrLzqXbUhFMY E79A== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id s186si5313076pgs.96.2017.05.18.06.37.56; Thu, 18 May 2017 06:37:56 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755661AbdERNhq (ORCPT + 25 others); 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 Received: from wuerfel.lan ([78.42.17.5]) by mrelayeu.kundenserver.de (mreue005 [212.227.15.129]) with ESMTPA (Nemesis) id 0Lla0h-1djaHr3aKt-00bGfT; Thu, 18 May 2017 15:36:12 +0200 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 Precedence: bulk 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(-) -- 2.9.0 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)