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Date:   Tue, 24 Jan 2017 15:02:56 -0500
From:   Dan Streetman <>
To:     Linux-MM <>,
        Andrew Morton <>
Cc:     Dan Streetman <>,
        Seth Jennings <>,
        Michal Hocko <>,
        Sergey Senozhatsky <>,
        Minchan Kim <>,
Subject: [PATCH 0/3] Fix zswap init failure behavior

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

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(-)


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