Extern or forward variable declaration at include/linux/gpio/consumer.h, line 534 References: drivers/gpio/gpio-dwapb.c, line 390 drivers/gpio/gpio-dwapb.c, line 562 drivers/gpio/gpiolib-acpi.c, line 714 drivers/gpio/gpiolib-acpi.c, line 884 drivers/gpio/gpiolib-acpi.c, line 1124 drivers/gpio/gpiolib-acpi.c, line 1167 drivers/gpio/gpiolib-devprop.c, line 28 drivers/gpio/gpiolib-devres.c, line 203 drivers/gpio/gpiolib.c, line 4539 drivers/gpio/gpiolib.c, line 4799 drivers/iio/dac/ad5592r-base.c, line 521 drivers/input/keyboard/gpio_keys.c, line 485 drivers/input/keyboard/gpio_keys.c, line 700 drivers/input/keyboard/gpio_keys.c, line 771 drivers/input/keyboard/gpio_keys_polled.c, line 148 drivers/input/keyboard/gpio_keys_polled.c, line 230 drivers/leds/leds-cr0014114.c, line 185 drivers/leds/leds-gpio.c, line 161 drivers/media/i2c/max2175.c, line 1288 drivers/media/i2c/ov5640.c, line 2558 drivers/media/i2c/ov7251.c, line 1257 drivers/media/i2c/ov7670.c, line 1730 drivers/media/i2c/ov7670.c, line 1732 drivers/media/i2c/smiapp/smiapp-core.c, line 2765 drivers/media/i2c/smiapp/smiapp-core.c, line 2766 drivers/media/platform/cadence/cdns-csi2rx.c, line 364 drivers/media/platform/davinci/vpif_capture.c, line 1393 drivers/media/platform/rcar-vin/rcar-vin.h, line 245 drivers/media/platform/rcar_drif.c, line 1197 drivers/media/platform/rcar_drif.c, line 1219 drivers/media/v4l2-core/v4l2-async.c, line 313 drivers/media/v4l2-core/v4l2-async.c, line 345 drivers/media/v4l2-core/v4l2-flash-led-class.c, line 619 drivers/media/v4l2-core/v4l2-flash-led-class.c, line 673 drivers/media/v4l2-core/v4l2-flash-led-class.c, line 683 drivers/media/v4l2-core/v4l2-fwnode.c, line 42 drivers/media/v4l2-core/v4l2-fwnode.c, line 112 drivers/media/v4l2-core/v4l2-fwnode.c, line 162 drivers/media/v4l2-core/v4l2-fwnode.c, line 187 drivers/media/v4l2-core/v4l2-fwnode.c, line 237 drivers/media/v4l2-core/v4l2-fwnode.c, line 278 drivers/media/v4l2-core/v4l2-fwnode.c, line 282 drivers/media/v4l2-core/v4l2-fwnode.c, line 348 drivers/media/v4l2-core/v4l2-fwnode.c, line 409 drivers/media/v4l2-core/v4l2-fwnode.c, line 418 drivers/media/v4l2-core/v4l2-fwnode.c, line 452 drivers/media/v4l2-core/v4l2-fwnode.c, line 737 drivers/media/v4l2-core/v4l2-fwnode.c, line 738 drivers/media/v4l2-core/v4l2-fwnode.c, line 743 drivers/media/v4l2-core/v4l2-fwnode.c, line 818 drivers/net/phy/phylink.c, line 165 drivers/net/phy/phylink.c, line 167 drivers/net/phy/phylink.c, line 264 drivers/net/phy/phylink.c, line 266 drivers/net/phy/phylink.c, line 759 drivers/net/phy/phylink.c, line 799 drivers/net/phy/sfp.c, line 2277 drivers/staging/media/imx/imx-media-dev.c, line 41 drivers/staging/media/imx/imx-media-dev.c, line 76 drivers/staging/media/imx/imx-media-of.c, line 236 drivers/staging/media/imx/imx-media-utils.c, line 722 drivers/staging/media/imx/imx-media.h, line 191 drivers/staging/media/imx/imx-media.h, line 226 drivers/usb/typec/tcpm/fusb302.c, line 1660 drivers/usb/typec/tcpm/fusb302.c, line 1662 include/linux/gpio/consumer.h, line 174 include/linux/gpio/consumer.h, line 176 include/linux/gpio/consumer.h, line 180 include/linux/gpio/consumer.h, line 185 include/linux/gpio/consumer.h, line 534 include/linux/gpio/consumer.h, line 537 include/linux/gpio/consumer.h, line 546 include/linux/gpio/consumer.h, line 556 include/linux/gpio/consumer.h, line 568 include/linux/gpio/consumer.h, line 580 include/linux/gpio/consumer.h, line 591 include/media/v4l2-flash-led-class.h, line 136 include/media/v4l2-flash-led-class.h, line 157 include/media/v4l2-flash-led-class.h, line 170 include/media/v4l2-flash-led-class.h, line 178 include/media/v4l2-subdev.h, line 860