17 Aug, 2015

1 commit

• 8025e5ddf   [media] mm: Provide new get_vaddr_frames() helper ... Browse Code »

  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.

  Signed-off-by: Jan Kara
  Acked-by: Mel Gorman
  Acked-by: Vlastimil Babka
  Acked-by: Andrew Morton
  Signed-off-by: Hans Verkuil
  Signed-off-by: Mauro Carvalho Chehab

  Jan Kara

  2015-08-17 00:02:47 +0800