open_sysfs 290 drivers/staging/greybus/tools/loopback_test.c fd = open_sysfs(sys_pfx, node, O_RDONLY); open_sysfs 301 drivers/staging/greybus/tools/loopback_test.c fd = open_sysfs(sys_pfx, node, O_RDONLY); open_sysfs 312 drivers/staging/greybus/tools/loopback_test.c fd = open_sysfs(sys_pfx, node, O_RDWR);