linux-kernel - Re: [PATCH v1 0/7] Minor Raid5 Fixes and Cleanup

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Date:   Fri, 8 Apr 2022 10:18:10 -0700
From:   Song Liu <song@...nel.org>
To:     Logan Gunthorpe <logang@...tatee.com>
Cc:     open list <linux-kernel@...r.kernel.org>,
        linux-raid <linux-raid@...r.kernel.org>,
        Guoqing Jiang <guoqing.jiang@...ux.dev>
Subject: Re: [PATCH v1 0/7] Minor Raid5 Fixes and Cleanup

On Thu, Apr 7, 2022 at 9:57 AM Logan Gunthorpe <logang@...tatee.com> wrote:
>
> Hi,
>
> This series contains a few cleanup and minor fixes to the raid5 code
> to make it a bit easier to hack on.
>
> Patch 1 cleans up the error returns in setup_conf() (I had an
> abandonded patch that added another error out and needed this clean
> more sensible).
>
> Patch 2 fixes a sparse warning with the raid5_percpu structure.
>
> Patch 3 through 6 fixes sparse warnings related to missing __rcu
> annotations when using the RCU calls.
>
> Patch 7 just adds some basic __must_hold annotations for the device_lock
> to any function that is called while holding the lock. Sparse doesn't
> really check this, but the annotation makes the locks a little easier
> to analyze.
>
> Thanks,
>
> Logan

Applied to md-next. Thanks!

>
> --
>
> Logan Gunthorpe (7):
>   md/raid5: Cleanup setup_conf() error returns
>   md/raid5: Un-nest struct raid5_percpu definition
>   md/raid5: Add __rcu annotation to struct disk_info
>   md/raid5: Annotate rdev/replacement accesses when nr_pending is
>     elevated
>   md/raid5: Annotate rdev/replacement access when mddev_lock is held
>   md/raid5-ppl: Annotate with rcu_dereference_protected()
>   md/raid5: Annotate functions that hold device_lock with __must_hold
>
>  drivers/md/raid5-ppl.c |  13 ++-
>  drivers/md/raid5.c     | 179 ++++++++++++++++++++++++++---------------
>  drivers/md/raid5.h     |  23 +++---
>  3 files changed, 139 insertions(+), 76 deletions(-)
>
>
> base-commit: 3123109284176b1532874591f7c81f3837bbdc17
> --
> 2.30.2