Re: Restructure vfs_busy and friends

[Taylor R Campbell <campbell+netbsd-tech-kern%mumble.net@localhost>]

> Date: Fri, 14 Apr 2017 12:22:48 +0200
> From: "J. Hannken-Illjes" <hannken%eis.cs.tu-bs.de@localhost>
> 
> Currently we have:
> 
> - vfs_busy(mp, NULL) to take a reference on the mount and enter
>   a critical section against unmounting.
> [...]
> 
> Plan is to restructure this as follows:
> 
> - vfs_busy(mp) takes a reference and enters a critical section.
>   The second "NULL" argument gets removed.
> [...]
> 
> Comments or objections?

Yes please!