Re: m68k build failures in -next: undefined reference to `arch_dma_prep_coherent'

[Christoph Hellwig]

On Mon, Jul 08, 2019 at 10:36:05PM +0200, Geert Uytterhoeven wrote:
> Note that the build failure is more subtle: both m5307c3_defconfig and
> m5475evb_defconfig build fine in m68k/for-linus, but fail in
> next-20190708.  So it fails when combined with other changes, going
> in through a different tree (the DMA tree?).

Yes, the dma tree adds the stub for the symbol and adds code relying
on that.