Hello, The following patch series is my first stab at abstracting 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. The patches are just compile tested (since I don't have any of the hardware I'm afraid I won't be able to do any more testing anyway) so please handle with care. I'm grateful for any comments. Honza -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>