Hi Jan, On 05/13/2015 03:08 PM, Jan Kara wrote: > Hello, > > I'm sending the fifth version of my patch series to abstract vma handling > from the various media drivers. The patches got some review from mm people and > testing from device driver guys so unless someone objects, patches will be > queued in media tree for the next merge window. What is the current status? I saw one comment for patch 9, so I assume it is not quite ready yet. Let me know when you think it is time to merge. Regards, Hans > > After this patch set drivers have to know much less details about vmas, their > types, and locking. Also quite some code is removed from them. As a bonus > drivers get automatically VM_FAULT_RETRY handling. The primary motivation for > this series is to remove knowledge about mmap_sem locking from as many places a > possible so that we can change it with reasonable effort. > > The core of the series is the new helper get_vaddr_frames() which is given a > virtual address and it fills in PFNs / struct page pointers (depending on VMA > type) into the 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, 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 (for x86 so e.g. > exynos driver which is only for Samsung platform is completely untested). > > Honza > Changes since v4: > * Minor cleanups and fixes pointed out by Mel and Vlasta > * Added Acked-by tags > > Changes since v3: > * Added include <linux/vmalloc.h> into mm/gup.c as it's needed for some archs > * Fixed error path for exynos driver > > Changes since v2: > * Renamed functions and structures as Mel suggested > * Other minor changes suggested by Mel > * Rebased on top of 4.1-rc2 > * Changed functions to get pointer to array of pages / pfns to perform > conversion if necessary. This fixes possible issue in the omap I may have > introduced in v2 and generally makes the API less errorprone. > -- > To unsubscribe from this list: send the line "unsubscribe linux-media" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- 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>