From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Thu, 12 Jun 2014 10:44:49 -0700

David, I have to agree with Michal. If the user-space tool did what it
had to do for old kernels, then new kernels should support the old
semantics.

You can't call it a "bug" - user space does what it does and it was
tested and worked.

And sure, it might have been a bug/misfeature of the old kernel, but
we have to live with what we have done, not blame others. Once user
space starts depending on our bugs, it's *our* problem.

Saying "fix your sh*t" is wrong, when we caused it to begin with.

Yeah I guess you're right and I'll end up applying Michal's patch.