Extern or forward variable declaration at include/drm/drm_sysfs.h, line 6 References: drivers/gpu/drm/nouveau/dispnv50/disp.c, line 81 drivers/gpu/drm/nouveau/dispnv50/disp.c, line 88 drivers/gpu/drm/nouveau/dispnv50/disp.c, line 88 drivers/gpu/drm/nouveau/dispnv50/disp.c, line 134 drivers/gpu/drm/nouveau/dispnv50/disp.c, line 138 drivers/gpu/drm/nouveau/dispnv50/disp.c, line 154 drivers/gpu/drm/nouveau/dispnv50/disp.c, line 165 drivers/gpu/drm/nouveau/dispnv50/disp.c, line 189 drivers/gpu/drm/nouveau/dispnv50/disp.c, line 208 drivers/gpu/drm/nouveau/dispnv50/disp.c, line 208 drivers/gpu/drm/nouveau/dispnv50/disp.c, line 209 drivers/gpu/drm/nouveau/dispnv50/disp.c, line 210 drivers/gpu/drm/nouveau/dispnv50/disp.c, line 211 drivers/gpu/drm/nouveau/dispnv50/disp.c, line 221 drivers/gpu/drm/nouveau/dispnv50/disp.c, line 221 drivers/gpu/drm/nouveau/dispnv50/disp.c, line 230 drivers/gpu/drm/nouveau/dispnv50/disp.c, line 438 drivers/gpu/drm/nouveau/dispnv50/disp.c, line 1508 drivers/gpu/drm/nouveau/dispnv50/disp.c, line 1509 drivers/gpu/drm/nouveau/dispnv50/disp.c, line 1660 drivers/gpu/drm/nouveau/dispnv50/disp.c, line 1727 drivers/gpu/drm/nouveau/dispnv50/disp.c, line 2250 drivers/gpu/drm/nouveau/dispnv50/disp.c, line 2250 drivers/gpu/drm/nouveau/dispnv50/disp.c, line 2296 drivers/gpu/drm/nouveau/dispnv50/disp.c, line 2299 drivers/staging/imx-drm/imx-drm-core.c, line 39 drivers/staging/imx-drm/imx-tve.c, line 117 drivers/staging/imx-drm/imx-tve.c, line 542