Re: [PATCH 03/12] fs: introduce f_op->mmap_capabilities for nommu mmap support

Tejun Heo
2015-01-11T17:24:52Z

On Thu, Jan 08, 2015 at 06:45:24PM +0100, Christoph Hellwig wrote:
> Since "BDI: Provide backing device capability information [try #3]" the
> backing_dev_info structure also provides flags for the kind of mmap
> operation available in a nommu environment, which is entirely unrelated
> to it's original purpose.
>
> Introduce a new nommu-only file operation to provide this information to
> the nommu mmap code instead. Splitting this from the backing_dev_info
> structure allows to remove lots of backing_dev_info instance that aren't
> otherwise needed, and entirely gets rid of the concept of providing a
> backing_dev_info for a character device. It also removes the need for
> the mtd_inodefs filesystem.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>

FWIW,

Reviewed-by: Tejun Heo <tj@kernel.org>

Thanks.

--
tejun