Re: [PATCH 0/9 v2] Helper to abstract vma handling in media layer

[Jan Kara <jack@suse.cz>]

  Hello,

On Tue 17-03-15 12:56:30, Jan Kara wrote:
>   After a long pause I'm sending second version of my patch series to abstract
> vma handling from the various media drivers. After this patch set drivers have
> to know much less details about vmas, their types, and locking. My motivation
> for the series is that I want to change get_user_pages() locking and I want to
> handle subtle locking details in as few places as possible.
> 
> The core of the series is the new helper get_vaddr_pfns() which is given a
> virtual address and it fills in PFNs into provided array. If PFNs correspond to
> normal pages it also grabs references to these pages. The difference from
> get_user_pages() is that this function can also deal with pfnmap, mixed, and io
> mappings which is what the media drivers need.
> 
> I have tested the patches with vivid driver so at least vb2 code got some
> exposure. Conversion of other drivers was just compile-tested so I'd like to
> ask respective maintainers if they could have a look.  Also I'd like to ask mm
> folks to check patch 2/9 implementing the helper. Thanks!
  Ping? Any reactions?

								Honza

-- 
Jan Kara <jack@suse.cz>
SUSE Labs, CR