Hi Günter,
On Mon, Jul 8, 2019 at 7:06 PM Guenter Roeck <linux@xxxxxxxxxxxx> wrote:
I see the following build error in -next:
kernel/dma/direct.o: In function `dma_direct_alloc_pages':
direct.c:(.text+0x4d8): undefined reference to `arch_dma_prep_coherent'
Example: m68k:allnoconfig.
Bisect log is ambiguous and points to the merge of m68k/for-next into
-next. Yet, I think the problem is with commit 69878ef47562 ("m68k:
Implement arch_dma_prep_coherent()") which is supposed to introduce
the function. The problem is likely that arch_dma_prep_coherent()
is only declared if CONFIG_MMU is enabled, but it is called from code
outside CONFIG_MMU.
Thanks, one more thing to fix in m68k-allnoconfig (did it really build
before?)...
Given you say "example", does it fail in real configs, too?
Thanks again!
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
