On Wed, May 11, 2016 at 10:15:20PM +0200, Arnd Bergmann wrote:

On Wednesday 11 May 2016 22:11:07 Arnd Bergmann wrote:

quoted

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 <arnd@arndb.de>
---
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.

That's probably the reason why patchwork didn't include the commit
message in the downloaded mbox. I've pieced it together manually and
applied this to topic/drm-misc.

Thanks,
Thierry
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 819 bytes
Desc: not available
URL: <http://lists.infradead.org/pipermail/linux-arm-kernel/attachments/20160621/563249f9/attachment.sig>