linux-kernel - [PATCH v3 0/3] zram: fix few sysfs races

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Message-Id: <20210621233013.562641-1-mcgrof@kernel.org>
Date:   Mon, 21 Jun 2021 16:30:10 -0700
From:   Luis Chamberlain <mcgrof@...nel.org>
To:     minchan@...nel.org, gregkh@...uxfoundation.org, jeyu@...nel.org,
        ngupta@...are.org, sergey.senozhatsky.work@...il.com
Cc:     mcgrof@...nel.org, axboe@...nel.dk, mbenes@...e.com,
        jpoimboe@...hat.com, tglx@...utronix.de, keescook@...omium.org,
        jikos@...nel.org, rostedt@...dmis.org, peterz@...radead.org,
        linux-block@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v3 0/3] zram: fix few sysfs races

This v3 changes the approach for the deadlock fix with wrappers which
provide the same solution of the try_module_get(). This is less code,
should be easier to review.

The last patch is also new. I dropped the bdget() stuff for the block
device and instead am doing a direct kobject fetch as well as a bus get to
provide a more generic solution without having to require each type to
implement its own refcounts.

This series also available on my linux-next repository:

https://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux-next.git/log/?h=20210427-sysfs-fix-races-v5

Luis Chamberlain (3):
  zram: fix crashes due to use of cpu hotplug multistate
  zram: fix deadlock with sysfs attribute usage and driver removal
  drivers/base/core: refcount kobject and bus on device attribute read /
    store

 drivers/base/base.h           |   2 +
 drivers/base/bus.c            |   4 +-
 drivers/base/core.c           |  42 +++++++++-
 drivers/block/zram/zram_drv.c | 141 ++++++++++++++++++++++++----------
 drivers/block/zram/zram_drv.h |  40 ++++++++++
 5 files changed, 181 insertions(+), 48 deletions(-)

-- 
2.30.2