Extern or forward variable declaration at include/linux/configfs.h, line 32 References: drivers/hwtracing/stm/core.c, line 870 drivers/hwtracing/stm/stm.h, line 31 drivers/hwtracing/stm/stm.h, line 95 drivers/infiniband/ulp/srpt/ib_srpt.c, line 3785 drivers/nvme/target/loop.c, line 490 drivers/nvme/target/loop.c, line 678 drivers/nvme/target/nvmet.h, line 270 drivers/pci/endpoint/pci-epc-core.c, line 597 drivers/pci/endpoint/pci-epc-core.c, line 655 drivers/pci/endpoint/pci-epf-core.c, line 210 drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c, line 4027 drivers/scsi/qla2xxx/qla_os.c, line 7131 drivers/scsi/qla2xxx/tcm_qla2xxx.c, line 1811 drivers/scsi/qla2xxx/tcm_qla2xxx.c, line 1858 drivers/target/iscsi/iscsi_target_configfs.c, line 1526 drivers/target/loopback/tcm_loop.c, line 314 drivers/target/loopback/tcm_loop.c, line 1126 drivers/target/sbp/sbp_target.c, line 2302 drivers/target/target_core_fabric_configfs.c, line 44 drivers/target/target_core_fabric_configfs.c, line 57 drivers/target/target_core_user.c, line 458 drivers/target/tcm_fc/tfc_sess.c, line 502 drivers/usb/gadget/configfs.c, line 1152 drivers/usb/gadget/function/f_tcm.c, line 1707 drivers/usb/gadget/function/u_tcm.h, line 30 drivers/vhost/scsi.c, line 2291 drivers/xen/xen-scsiback.c, line 1802 fs/configfs/dir.c, line 1285 fs/configfs/dir.c, line 1465 fs/configfs/file.c, line 44 include/linux/configfs.h, line 32 include/linux/configfs.h, line 68 include/linux/configfs.h, line 119 include/linux/usb/composite.h, line 100 include/linux/usb/composite.h, line 216 include/linux/usb/composite.h, line 580 include/target/iscsi/iscsi_transport.h, line 12 include/target/target_core_backend.h, line 24 include/target/target_core_fabric.h, line 10 include/target/target_core_fabric.h, line 10