Extern or forward variable declaration at drivers/gpio/gpiolib.h, line 196 References: drivers/gpio/gpiolib-sysfs.c, line 604 drivers/gpio/gpiolib-sysfs.c, line 607 drivers/gpio/gpiolib-sysfs.c, line 615 drivers/gpio/gpiolib-sysfs.c, line 824 drivers/gpio/gpiolib-sysfs.c, line 838 drivers/gpio/gpiolib-sysfs.c, line 840 drivers/gpio/gpiolib-sysfs.c, line 842 drivers/gpio/gpiolib.c, line 73 drivers/gpio/gpiolib.c, line 110 drivers/gpio/gpiolib.c, line 115 drivers/gpio/gpiolib.c, line 120 drivers/gpio/gpiolib.c, line 293 drivers/gpio/gpiolib.c, line 305 drivers/gpio/gpiolib.c, line 311 drivers/gpio/gpiolib.c, line 1302 drivers/gpio/gpiolib.c, line 1315 drivers/gpio/gpiolib.c, line 1330 drivers/gpio/gpiolib.c, line 1334 drivers/gpio/gpiolib.c, line 1401 drivers/gpio/gpiolib.c, line 1403 drivers/gpio/gpiolib.c, line 1462 drivers/gpio/gpiolib.c, line 1468 drivers/gpio/gpiolib.c, line 1580 drivers/gpio/gpiolib.c, line 1587 drivers/gpio/gpiolib.c, line 2263 drivers/gpio/gpiolib.c, line 2279 drivers/gpio/gpiolib.c, line 2281 drivers/gpio/gpiolib.c, line 2291 drivers/gpio/gpiolib.c, line 2293 drivers/gpio/gpiolib.c, line 2296 drivers/gpio/gpiolib.c, line 2370 drivers/gpio/gpiolib.c, line 2375 drivers/gpio/gpiolib.c, line 2378 drivers/gpio/gpiolib.c, line 2389 drivers/gpio/gpiolib.c, line 4306 drivers/gpio/gpiolib.c, line 4309 drivers/gpio/gpiolib.c, line 4312 drivers/gpio/gpiolib.c, line 4323 drivers/gpio/gpiolib.c, line 4328 drivers/gpio/gpiolib.h, line 196