Merge /home/v4l/v4l/patchwork

Merge /home/v4l/v4l/patchwork

* /home/v4l/v4l/patchwork: (5978 commits)
  pwc: Add support for control events
  [media] radio-rtrack2: add missing slab.h
  [media] pwc: poll(): Check that the device has not beem claimed for streaming already
  [media] vivi: let vb2_poll handle events
  [media] videobuf2-core: also test for pending events
  [media] videobuf: only start streaming in poll() if so requested by the poll mask
  [media] videobuf2: only start streaming in poll() if so requested by the poll mask
  [media] ivtv: only start streaming in poll() if polling for input
  poll: add poll_requested_events() and poll_does_not_wait() functions
  crc32: select an algorithm via Kconfig
  crc32: add self-test code for crc32c
  crypto: crc32c should use library implementation
  crc32: bolt on crc32c
  crc32: add note about this patchset to crc32.c
  crc32: optimize loop counter for x86
  crc32: add slice-by-8 algorithm to existing code
  crc32: make CRC_*_BITS definition correspond to actual bit counts
  crc32: fix mixing of endian-specific types
  crc32: miscellaneous cleanups
  crc32: simplify unit test code
  ...