Re: [PATCH v5 9/9] block: Assign a lock_class per gendisk used for wait_for_completion()

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* Byungchul Park <byungchul.park@xxxxxxx> wrote:

> Darrick posted the following warning and Dave Chinner analyzed it:
> 
> > ======================================================
> > WARNING: possible circular locking dependency detected
> > 4.14.0-rc1-fixes #1 Tainted: G        W

> Reported-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
> Analyzed-by: Dave Chinner <david@xxxxxxxxxxxxx>
> Signed-off-by: Byungchul Park <byungchul.park@xxxxxxx>
> ---
>  block/bio.c           |  2 +-
>  block/genhd.c         | 10 ++--------
>  include/linux/genhd.h | 22 ++++++++++++++++++++--
>  3 files changed, 23 insertions(+), 11 deletions(-)

Ok, this patch looks good to me now, I'll wait to get an Ack or Nak from Jens for 
these changes.

Jens: this patch has some dependencies in prior lockdep changes, so I'd like to 
carry it in the locking tree for a v4.15 merge.

Thanks,

	Ingo



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