They don't avoid it; it's still CDDL, and it's still incompatible. This means that it can't be shipped within the kernel itself, so you have to build a module (

They don't avoid it; it's still CDDL, and it's still incompatible. This means that it can't be shipped within the kernel itself, so you have to build a module (which is marked as tainted) for your particular kernel. OpenAFS has this same issue BTW. http://zfsonlinux.org/faq.html#WhatAboutTheLicensingIssue http://zfsonlinux.org/faq.html#WhatAboutTheLicensingIssue