[cc += Rafael J. Wysocki, linux-acpi] Hi Stephen, 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. Ugh, apologies, I didn't have a non-ACPI platform available to test this on. Solution is to either add to include/linux/acpi.h static inline bool acpi_dev_present(const char *hid) { return false; } somewhere below #else /* !CONFIG_ACPI */ or alternatively to add to include/linux/apple-gmux.h IS_ENABLED(CONFIG_ACPI) in apple_gmux_present(). I'll check the other users of acpi_dev_present() to see which of these two solutions is more appropriate and will post a fix shortly. Thanks a lot for reporting this. Lukas -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html