Extern or forward variable declaration at include/drm/drm_format_helper.h, line 9 References: drivers/gpu/drm/drm_format_helper.c, line 36 drivers/gpu/drm/mgag200/mgag200_mode.c, line 434 drivers/gpu/drm/mgag200/mgag200_mode.c, line 481 drivers/gpu/drm/tiny/simpledrm.c, line 70 drivers/gpu/drm/tiny/simpledrm.c, line 76 drivers/gpu/drm/tiny/simpledrm.c, line 85 drivers/gpu/drm/tiny/simpledrm.c, line 120 drivers/gpu/drm/tiny/simpledrm.c, line 184 drivers/gpu/drm/tiny/simpledrm.c, line 216 drivers/gpu/drm/tiny/simpledrm.c, line 471 include/drm/drm_format_helper.h, line 9 include/drm/drm_format_helper.h, line 13