[fmajid]

I'm not disagreeing with you. I fully understand why the code can't be incorporated as is. Then again, workarounds were found for things like the proprietary nVidia drivers, and the unwillingness to do so for an arguably far superior filesystem reeks of NIH.

[arp242]

I'm not sure what you mean? The nVidia drivers have never been considered for inclusion in the kernel source tree?

[fmajid]

No, but there is a stable kernel API and ABI to interface with them, unlike the VFS kernel API that constantly changes and induces breakage in ZoL.