This function follows the semantics of vmap() by returning
NULL in case of an error. To make things less confusing
rename it to make make both functions more closely related.
Signed-off-by: NLucas Stach <l.stach@pengutronix.de>

This adds the etnaviv DRM driver and hooks it up in Makefiles
and Kconfig.
Signed-off-by: NChristian Gmeiner <christian.gmeiner@gmail.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: NLucas Stach <l.stach@pengutronix.de>
Acked-by: NDaniel Vetter <daniel.vetter@ffwll.ch>