device_open_cb    686 drivers/staging/gasket/apex_driver.c 	.device_open_cb = apex_device_open_cb,
device_open_cb   1217 drivers/staging/gasket/gasket_core.c 							      driver_desc->device_open_cb);
device_open_cb    409 drivers/staging/gasket/gasket_core.h 	int (*device_open_cb)(struct gasket_dev *dev);