On Mon, Oct 18, 2021 at 1:40 PM Christian König <christian.koenig@xxxxxxx> wrote: > >> I have absolutely no idea how a platform can have IOMMU but no MMU > >> support but it indeed seems to be the case here. > > Huh? > > > > Parisc has config MMU def_bool y? > > Then why vmap isn't available? > > See the mail thread: [linux-next:master 3576/7806] > drivers/gpu/drm/msm/msm_gem.c:624:20: error: implicit declaration of > function 'vmap' This is just a missing "#include <linux/vmalloc.h>". It must be included indirectly on some architectures but not other. Arnd