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

[Tejun Heo]

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 at lst.de>

FWIW,

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

Thanks.

-- 
tejun