On Wed, Feb 10, 2016 at 12:24:51PM +1100, Stephen Rothwell wrote:

Hi all,

After merging the drm-misc tree, today's linux-next build (arm
multi_v7_defconfig) failed like this:

In file included from drivers/gpu/drm/nouveau/nouveau_drm.c:25:0:
include/linux/apple-gmux.h: In function 'apple_gmux_present':
include/linux/apple-gmux.h:36:42: error: implicit declaration of function 'acpi_dev_present' [-Werror=implicit-function-declaration]
  return IS_ENABLED(CONFIG_APPLE_GMUX) && acpi_dev_present(GMUX_ACPI_HID);
                                          ^

Caused by commit

  2413306c2566 ("apple-gmux: Add helper for presence detect")

I have used the drm-misc tree from next-20160209 for today.

Can you pls attach your .config? The function is there, I suspect we're
just missing some depends in Kconfig.
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch