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? -- 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>