disable_backlight_sysfs_if 53 drivers/acpi/acpi_video.c static int disable_backlight_sysfs_if = -1; disable_backlight_sysfs_if 54 drivers/acpi/acpi_video.c module_param(disable_backlight_sysfs_if, int, 0444); disable_backlight_sysfs_if 390 drivers/acpi/acpi_video.c if (disable_backlight_sysfs_if == -1) disable_backlight_sysfs_if 391 drivers/acpi/acpi_video.c disable_backlight_sysfs_if = 1; disable_backlight_sysfs_if 1754 drivers/acpi/acpi_video.c if (disable_backlight_sysfs_if > 0)