Re: [PATCH v4 4/5] cramfs: add mmap support

[Christoph Hellwig]

On Tue, Oct 03, 2017 at 11:40:28AM -0400, Nicolas Pitre wrote:
> I provided that explanation several times by now in my cover letter. And 
> separately even to you directly at least once.  What else should I do?

You should do the right things instead of stating irrelevant things
in your cover letter.  As said in my last mail: look at the VM_MIXEDMAP
flag and how it is used by DAX, and you'll get out of the vma splitting
business in the fault path.

If the fs/dax.c code scares you take a look at drivers/dax/device.c
instead.