Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S1753260AbcKHPGq (ORCPT <rfc822;w@1wt.eu>);
        Tue, 8 Nov 2016 10:06:46 -0500
Received: from mail.fireflyinternet.com ([109.228.58.192]:54447 "EHLO
        fireflyinternet.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org
        with ESMTP id S1753157AbcKHPGo (ORCPT
        <rfc822;linux-kernel@vger.kernel.org>);
        Tue, 8 Nov 2016 10:06:44 -0500
X-Default-Received-SPF: pass (skip=forwardok (res=PASS)) x-ip-name=78.156.65.138;
Date: Tue, 8 Nov 2016 14:49:05 +0000
From: Chris Wilson <chris@chris-wilson.co.uk>
To: Arnd Bergmann <arnd@arndb.de>
Cc: Daniel Vetter <daniel.vetter@intel.com>,
        Jani Nikula <jani.nikula@linux.intel.com>,
        David Airlie <airlied@linux.ie>,
        Joonas Lahtinen <joonas.lahtinen@linux.intel.com>,
        intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH] drm/i915: avoid harmless empty-body warning
Message-ID: <20161108144905.GC11395@nuc-i3427.alporthouse.com>
Mail-Followup-To: Chris Wilson <chris@chris-wilson.co.uk>,
        Arnd Bergmann <arnd@arndb.de>,
        Daniel Vetter <daniel.vetter@intel.com>,
        Jani Nikula <jani.nikula@linux.intel.com>,
        David Airlie <airlied@linux.ie>,
        Joonas Lahtinen <joonas.lahtinen@linux.intel.com>,
        intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org,
        linux-kernel@vger.kernel.org
References: <20161108135834.2166677-1-arnd@arndb.de>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Disposition: inline
Content-Transfer-Encoding: 8bit
In-Reply-To: <20161108135834.2166677-1-arnd@arndb.de>
User-Agent: Mutt/1.5.21 (2010-09-15)
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org
Content-Length: 783
Lines: 17

On Tue, Nov 08, 2016 at 02:58:17PM +0100, Arnd Bergmann wrote:
> The newly added assert_kernel_context_is_current introduces a warning
> when built with W=1:
> 
> drivers/gpu/drm/i915/i915_gem.c: In function ‘assert_kernel_context_is_current’:
> drivers/gpu/drm/i915/i915_gem.c:4417:63: error: suggest braces around empty body in an ‘else’ statement [-Werror=empty-body]
> 
> Changing the GEM_BUG_ON() macro from an empty definition to "do { } while (0)"
> makes the macro more robust to use and avoids the warning.
> 
> Fixes: 3033acab07f9 ("drm/i915: Queue the idling context switch after all other timelines")
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre