Le 13/12/2024 à 08:40, Christophe Leroy a écrit :

Le 12/12/2024 à 11:04, Thomas Zimmermann a écrit :

quoted

Select FB_CORE if GEM's DMA and TTM implementations support fbdev
emulation. Fixes linker errors about missing symbols from the fbdev
subsystem.

Also see [1] for a related SHMEM fix.

Fixes: dadd28d4142f ("drm/client: Add client-lib module")
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/series/141411/ # 1
---
  drivers/gpu/drm/Kconfig | 2 ++
  1 file changed, 2 insertions(+)

Build fails which pmac32_defconfig :

   LD      .tmp_vmlinux1
powerpc64-linux-ld: drivers/macintosh/via-pmu-backlight.o: in function 
`pmu_backlight_init':
via-pmu-backlight.c:(.init.text+0xc0): undefined reference to 
`backlight_device_register'
make[2]: *** [scripts/Makefile.vmlinux:77: vmlinux] Error 1
make[1]: *** [/home/chleroy/linux-powerpc/Makefile:1225: vmlinux] Error 2

Sorry that failure is from patch 1.