On 06/01/2015 02:40 PM, Jan Kara wrote: > On Thu 28-05-15 16:24:02, Andrew Morton wrote: >> On Wed, 13 May 2015 15:08:08 +0200 Jan Kara <jack@xxxxxxx> wrote: >> >>> Provide new function get_vaddr_frames(). This function maps virtual >>> addresses from given start and fills given array with page frame numbers of >>> the corresponding pages. If given start belongs to a normal vma, the function >>> grabs reference to each of the pages to pin them in memory. If start >>> belongs to VM_IO | VM_PFNMAP vma, we don't touch page structures. Caller >>> must make sure pfns aren't reused for anything else while he is using >>> them. >>> >>> This function is created for various drivers to simplify handling of >>> their buffers. >>> >>> Acked-by: Mel Gorman <mgorman@xxxxxxx> >>> Acked-by: Vlastimil Babka <vbabka@xxxxxxx> >>> Signed-off-by: Jan Kara <jack@xxxxxxx> >>> --- >>> include/linux/mm.h | 44 +++++++++++ >>> mm/gup.c | 226 +++++++++++++++++++++++++++++++++++++++++++++++++++++ >> >> That's a lump of new code which many kernels won't be needing. Can we >> put all this in a new .c file and select it within drivers/media >> Kconfig? > Yeah, makes sense. I'll write a patch. Hans, is it OK with you if I > just create a patch on top of the series you have in your tree? No problem. Regards, Hans -- 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>