[PATCH v2 0/6] zram: recompression cleanups and tweaks

[Sergey Senozhatsky <senozhatsky@chromium.org>]

This series is a somewhat random mix of fixups,
recompression cleanups and improvements partly based
on internal conversations.  A few patches in the series
remove unexpected or confusing behaviour, e.g. auto
correction of bad priority= param for recompression,
which should have always been just an error.  Then it
also removes "chain recompression" which has a tricky,
unexpected and confusing behaviour at times.  We also
unify and harden the handling of algo/priority params.
There is also an addition of missing device lock in
algorithm_params_store() which previously permitted
modification of algo params while the device is active.

Sergey Senozhatsky (6):
  zram: do not permit params change after init
  zram: do not autocorrect bad recompression parameters
  zram: drop ->num_active_comps
  zram: update recompression documentation
  zram: remove chained recompression
  zram: unify and harden algo/priority params handling

 Documentation/admin-guide/blockdev/zram.rst |  49 ++---
 drivers/block/zram/zram_drv.c               | 214 ++++++++++----------
 drivers/block/zram/zram_drv.h               |   1 -
 3 files changed, 123 insertions(+), 141 deletions(-)

-- 
2.53.0.473.g4a7958ca14-goog