Extern or forward variable declaration at include/linux/gpio/driver.h, line 13 References: arch/arm/mach-mvebu/pm-board.c, line 94 drivers/ata/sata_highbank.c, line 352 drivers/bcma/main.c, line 161 drivers/bcma/main.c, line 183 drivers/gpio/gpio-brcmstb.c, line 305 drivers/gpio/gpio-davinci.c, line 176 drivers/gpio/gpio-etraxfs.c, line 183 drivers/gpio/gpio-lpc32xx.c, line 494 drivers/gpio/gpio-pxa.c, line 320 drivers/gpio/gpio-rcar.c, line 369 drivers/gpio/gpio-xilinx.c, line 263 drivers/gpio/gpiolib-of.c, line 31 drivers/gpio/gpiolib-of.c, line 38 drivers/gpio/gpiolib-of.c, line 44 drivers/gpio/gpiolib-of.c, line 73 drivers/gpio/gpiolib-of.c, line 179 drivers/gpio/gpiolib-of.c, line 318 drivers/gpio/gpiolib-of.c, line 423 drivers/phy/phy-sun4i-usb.c, line 575 drivers/pinctrl/pinctrl-oxnas.c, line 744 drivers/pinctrl/qcom/pinctrl-spmi-gpio.c, line 546 drivers/pinctrl/qcom/pinctrl-spmi-mpp.c, line 610 drivers/pinctrl/qcom/pinctrl-ssbi-gpio.c, line 513 drivers/pinctrl/qcom/pinctrl-ssbi-mpp.c, line 526 drivers/pinctrl/sirf/pinctrl-sirf.c, line 263 drivers/pinctrl/sunxi/pinctrl-sunxi.c, line 506 drivers/usb/chipidea/ci_hdrc_imx.c, line 107 include/linux/gpio/driver.h, line 13 include/linux/gpio/driver.h, line 209 include/linux/of_gpio.h, line 65 include/linux/of_gpio.h, line 81