On Tue, Nov 10, 2015 at 1:45 AM, Guenter Roeck <linux@xxxxxxxxxxxx> wrote: > On Wed, Nov 04, 2015 at 08:22:26PM +1100, Stephen Rothwell wrote: >> Hi Dave, >> >> After merging the drm tree, today's linux-next build (s390 allmodconfig) >> failed like this: >> >> drivers/gpu/drm/nouveau/nvkm/subdev/instmem/gk20a.c:143:2: error: implicit declaration of function 'dma_to_phys' [-Werror=implicit-function-declaration] >> >> Caused by commit >> >> 69c4938249fb ("drm/nouveau/instmem/gk20a: use direct CPU access") >> >> Discovered after the release. >> > Still seen in next-20151109, affecting at least alpha, i386, parisc, s390, > and xtensa, but probably other architectures as well. > > dma_to_phys() was until now not used from driver code, and is only declared > for an architecture if it is used/needed there. Mmm there doesn't seem to be a portable way of getting a physical address from a DMA handle, which is what we are trying to do in this code. In that particular case a cast is enough though, so we should probably just do that. I will send a patch for Ben/David to include in order to fix this issue at least. -- To unsubscribe from this list: send the line "unsubscribe linux-next" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html