On Fri, Feb 26, 2016 at 04:23:09PM +0100, Petr Mladek wrote:

I do not have a strong opinion here. On one hand, such a check might
help with debugging. On the other hand, workqueues have happily lived
without it for years.

TJ and me have a different view on these things. I'm always for the
strictest possible semantics with strong validation. TJ always worries a
lot about existing users.

Luckily, you don't have users yet :-)