Function prototype or declaration at include/linux/backlight.h, line 132 References: drivers/acpi/acpi_video.c, line 1749 drivers/gpu/drm/amd/amdgpu/atombios_encoders.c, line 198 drivers/gpu/drm/bridge/parade-ps8622.c, line 586 drivers/gpu/drm/gma500/cdv_device.c, line 165 drivers/gpu/drm/gma500/mdfld_device.c, line 132 drivers/gpu/drm/gma500/oaktrail_device.c, line 157 drivers/gpu/drm/gma500/psb_device.c, line 133 drivers/gpu/drm/i915/intel_panel.c, line 1276 drivers/gpu/drm/nouveau/nouveau_backlight.c, line 115 drivers/gpu/drm/nouveau/nouveau_backlight.c, line 248 drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c, line 1250 drivers/gpu/drm/omapdrm/displays/panel-sony-acx565akm.c, line 772 drivers/gpu/drm/panel/panel-samsung-s6e3ha2.c, line 723 drivers/gpu/drm/radeon/atombios_encoders.c, line 219 drivers/gpu/drm/radeon/radeon_legacy_encoders.c, line 396 drivers/gpu/drm/shmobile/shmob_drm_backlight.c, line 70 drivers/hid/hid-picolcd_backlight.c, line 79 drivers/platform/x86/acer-wmi.c, line 1482 drivers/platform/x86/apple-gmux.c, line 723 drivers/platform/x86/asus-laptop.c, line 832 drivers/platform/x86/asus-wmi.c, line 1599 drivers/platform/x86/classmate-laptop.c, line 971 drivers/platform/x86/compal-laptop.c, line 1008 drivers/platform/x86/dell-laptop.c, line 2191 drivers/platform/x86/eeepc-laptop.c, line 1162 drivers/platform/x86/ideapad-laptop.c, line 756 drivers/platform/x86/intel_oaktrail.c, line 253 drivers/platform/x86/msi-laptop.c, line 1071 drivers/platform/x86/msi-wmi.c, line 248 drivers/platform/x86/panasonic-laptop.c, line 604 drivers/platform/x86/samsung-laptop.c, line 1200 drivers/platform/x86/samsung-q10.c, line 62 drivers/platform/x86/sony-laptop.c, line 3159 drivers/platform/x86/thinkpad_acpi.c, line 6846 drivers/platform/x86/toshiba_acpi.c, line 2932 drivers/staging/fbtft/fb_ssd1351.c, line 212 drivers/staging/fbtft/fb_watterott.c, line 261 drivers/staging/fbtft/fbtft-core.c, line 310 drivers/staging/olpc_dcon/olpc_dcon.c, line 645 drivers/usb/misc/appledisplay.c, line 283 drivers/video/backlight/apple_bl.c, line 184 drivers/video/backlight/backlight.c, line 331 drivers/video/backlight/backlight.c, line 395 drivers/video/backlight/backlight.c, line 521 drivers/video/backlight/locomolcd.c, line 201 drivers/video/backlight/lp8788_bl.c, line 216 drivers/video/backlight/pwm_bl.c, line 355 drivers/video/fbdev/atmel_lcdfb.c, line 246 drivers/video/fbdev/aty/aty128fb.c, line 1873 drivers/video/fbdev/aty/atyfb_base.c, line 2238 drivers/video/fbdev/aty/radeon_backlight.c, line 157 drivers/video/fbdev/bf537-lq035.c, line 767 drivers/video/fbdev/bf54x-lq043fb.c, line 654 drivers/video/fbdev/bfin-t350mcqb-fb.c, line 551 drivers/video/fbdev/mx3fb.c, line 321 drivers/video/fbdev/nvidia/nv_backlight.c, line 110 drivers/video/fbdev/omap2/omapfb/displays/panel-dsi-cm.c, line 1254 drivers/video/fbdev/omap2/omapfb/displays/panel-sony-acx565akm.c, line 818 drivers/video/fbdev/riva/fbdev.c, line 345 drivers/video/fbdev/sh_mobile_lcdcfb.c, line 2316 drivers/video/fbdev/ssd1307fb.c, line 695 include/linux/backlight.h, line 132