[PATCH 0/3] Fix zswap init failure behavior

[Dan Streetman]

If zswap fails to initialize itself at boot, it returns error from its
init function; but for built-in drivers, that does not unload them; and
more importantly, it doesn't prevent their sysfs module param interface
from being created.  In this case, changing the compressor or zpool param
will result in a WARNING because zswap didn't expect them to be changed if
initialization failed.

These patches fix that assumption, as well as allowing pool creation after
a failed initialization, if only the zpool and/or compressor creation
failed.

Dan Streetman (3):
  zswap: disable changing params if init fails
  zswap: allow initialization at boot without pool
  zswap: clear compressor or zpool param if invalid at init

 mm/zswap.c | 125 ++++++++++++++++++++++++++++++++++++++++++++++++-------------
 1 file changed, 100 insertions(+), 25 deletions(-)

-- 
2.9.3