dnvme driver installation fails on RHEL7.5

[ravibg]

The dnevme driver compilation works fine but the driver fails to load.

kernel: 3.10.0-862.el7.x86_64

log snippet:
Nov 16 03:45:43 allnvmepl2 kernel: Call Trace:
Nov 16 03:45:43 allnvmepl2 kernel: [] dump_stack+0x19/0x1b
Nov 16 03:45:43 allnvmepl2 kernel: [] __warn+0xd8/0x100
Nov 16 03:45:43 allnvmepl2 kernel: [] warn_slowpath_fmt+0x5f/0x80
Nov 16 03:45:43 allnvmepl2 kernel: [] ? sysfs_warn_dup+0x6c/0x80
Nov 16 03:45:43 allnvmepl2 kernel: [] kobject_add_internal+0x274/0x330
Nov 16 03:45:43 allnvmepl2 kernel: [] ? kobject_set_name+0x4e/0x70
Nov 16 03:45:43 allnvmepl2 kernel: [] kset_register+0x46/0x70
Nov 16 03:45:43 allnvmepl2 kernel: [] __class_register+0xe0/0x250
Nov 16 03:45:43 allnvmepl2 kernel: [] __class_create+0x51/0x90
Nov 16 03:45:43 allnvmepl2 kernel: [] ? 0xffffffffc0b77fff
Nov 16 03:45:43 allnvmepl2 kernel: [] dnvme_init+0xa3/0x1000 [dnvme]
Nov 16 03:45:43 allnvmepl2 kernel: [] do_one_initcall+0xba/0x240
Nov 16 03:45:43 allnvmepl2 kernel: [] load_module+0x272c/0x2bc0
Nov 16 03:45:43 allnvmepl2 kernel: [] ? ddebug_proc_write+0xf0/0xf0
Nov 16 03:45:43 allnvmepl2 kernel: [] ? copy_module_from_fd.isra.43+0x53/0x150
Nov 16 03:45:43 allnvmepl2 kernel: [] SyS_finit_module+0xa6/0xd0
Nov 16 03:45:43 allnvmepl2 kernel: [] system_call_fastpath+0x1c/0x21
Nov 16 03:45:43 allnvmepl2 kernel: ---[ end trace 970d8c01bd61c12c ]---
Nov 16 03:45:43 allnvmepl2 kernel: dnvme-err:/opt/dnvme-master/sysdnvme.c:122: NVMe class creation failed