From mboxrd@z Thu Jan 1 00:00:00 1970 From: arnd@arndb.de (Arnd Bergmann) Date: Wed, 11 May 2016 22:15:20 +0200 Subject: [PATCH] drm: mediatek: remove IOMMU_DMA select 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> Message-ID: <3436915.Zo8cThvXaA@wuerfel> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.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