Extern or forward variable declaration at include/linux/gpio/driver.h, line 15 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 481 drivers/gpio/gpio-pxa.c, line 320 drivers/gpio/gpio-rcar.c, line 362 drivers/gpio/gpiolib-of.c, line 33 drivers/gpio/gpiolib-of.c, line 289 drivers/gpio/gpiolib-of.c, line 394 drivers/phy/phy-sun4i-usb.c, line 500 drivers/pinctrl/pinctrl-st.c, line 803 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 259 drivers/pinctrl/sunxi/pinctrl-sunxi.c, line 507 drivers/usb/chipidea/ci_hdrc_imx.c, line 107 include/linux/gpio/driver.h, line 15 include/linux/gpio/driver.h, line 204 include/linux/of_gpio.h, line 67 include/linux/of_gpio.h, line 83 sound/soc/generic/simple-card.c, line 221 sound/soc/generic/simple-card.c, line 383