From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751939AbcEKUQJ (ORCPT ); Wed, 11 May 2016 16:16:09 -0400 Received: from mout.kundenserver.de ([217.72.192.74]:56501 "EHLO mout.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751863AbcEKUQH (ORCPT ); Wed, 11 May 2016 16:16:07 -0400 From: Arnd Bergmann To: linux-arm-kernel@lists.infradead.org Cc: airlied@redhat.com, David Airlie , Bibby Hsieh , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Mao Huang , YT Shen , CK Hu , linux-mediatek@lists.infradead.org, Philipp Zabel , Matthias Brugger Subject: Re: [PATCH] drm: mediatek: remove IOMMU_DMA select Date: Wed, 11 May 2016 22:15:20 +0200 Message-ID: <3436915.Zo8cThvXaA@wuerfel> User-Agent: KMail/4.11.5 (Linux/3.16.0-10-generic; KDE/4.11.5; x86_64; ; ) In-Reply-To: <1462997501-982363-1-git-send-email-arnd@arndb.de> References: <1462982509-342936-1-git-send-email-arnd@arndb.de> <1462997501-982363-1-git-send-email-arnd@arndb.de> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" X-Provags-ID: V03:K0:nzj7SmQuuKB7wBLeKYB+k1QySOo/RWaleAu5vdLf3rojaVG1VeD 8eHbAp7tUDvtkOlCnupsfUuIdl4aTNpll0pEEm+v43z4E/Vd52FXXe59q70w0pr5Fqw0gpz lAGVjI72LflTRV4c6uNc5kJmy5sszZTsf+zw8cTyxwuc2ac0eNcZknvgJX5F1zM3XkYo7d8 5iMpx/wzqDG3gesujx52g== X-UI-Out-Filterresults: notjunk:1;V01:K0:aKZnQXy+5SM=:xxWARmXNRanwic9nZ0vEch ThtP/BmD2NXZzyHp85l8+KqI864CVdFWsV/Px7x5WoiUT24PjfNYdl40llTXAEIyY9kPm9CSP l4TJ1K5xQ8GE+dk6hhFsgi8UZl0SPKh3XxXR8iLbZiICB7cEDMzyQkzOfLkFABq3+bVCBpOwf LVWb4SIUiN9DbYXqdtMjHjuBNVOzQszQ4o52QqpwDdYyl+M/d757im0GSgTiMe7FaalcwZpgF q2PsuhtmBnJeezzCovBuNJbB2mur8grM8OiT2kjjDf62ZzQ9wOldk2CrofhqsR1BTKaYUnPWZ YSglj4E//dz1rPop9Ts4Y32b1NTg7h4I7Idue68+OBWb8sAY9eF205t2DSPG+f6weALkK90h/ jPk1GNihrwUeob9e/9CPrCFB6szf+rfZ9tfthaDPCAznpNSUqXKaJnw1P9pdi3Km6J5dsFvRW xX4ezqXXlRYMYUvOIN0x8M/Nu7IE2/HmyI2Vz0bMkp3Zi0JLGVbrDEvbmyYImjUJMZ3Q444/K e1Mop27RhgsGq57m5tgrU9l/PMNBdVs2hEqzH9yBYWZ4mUtx6ZP2VnBUvGGjHcTIy6ezV8VVN gna5khP8lWZWSG2XVJ2J/K+j0KExATamqLCTnuYMTVC22E3De/+e9dLD2IHcztCHf+o2Kfof8 VAuu9fovsn4GdnWbmOex9fxWp/mmbrRsOzEN/r9jL4qoa9x2/0IY7gLmyoxFrkcY5pQZxcyTX 1RzrPlFFlEjEBmqq Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wednesday 11 May 2016 22:11:07 Arnd Bergmann wrote: > We get a harmless build warning when trying to use the mediatek > DRM driver with IOMMU support disabled: > > warning: (DRM_MEDIATEK) selects IOMMU_DMA which has unmet direct dependencies (IOMMU_SUPPORT) > > However, the IOMMU_DMA symbol is not meant to be used by drivers > at all, and this driver doesn't seem to have a strict dependency > on it other than using the mediatek IOMMU driver that does. > > Since we also want to be able to do compile tests with the > driver on other platforms, the IOMMU_DMA symbol should not > be selected here. > > Signed-off-by: Arnd Bergmann > --- > If someone has a better explanation about why the 'select' is here, > let me know, it certainly seems out of place. Sorry, I didn't mean to send this as a reply to "More build fixes for omapdrm in current -next", I copied the wrong command line. I'll resend it if necessary. Arnd