[PATCH 4/6] dm: refactor ioctl handling

[Christoph Hellwig]

On Tue, Aug 04, 2015 at 01:56:16PM -0400, Mike Snitzer wrote:
> This should be renamed to dm_prepare_ioctl_fn and the targets' hook
> would be .prepare_ioctl
> 
> Open to other names but if the targets no longer issue the ioctl there
> is little point to call it .ioctl

Sure.  I had ioctl_allowed first but that sounded so ugly that I
undid the renaming..