Re: [PATCH 6.6 1/6] md/raid5: recheck if reshape has finished with device_lock held

[Sasha Levin <sashal@kernel.org>]

[ Sasha's backport helper bot ]

Hi,

The upstream commit SHA1 provided is correct: 25b3a8237a03ec0b67b965b52d74862e77ef7115

WARNING: Author mismatch between patch and upstream commit:
Backport author: Yu Kuai<yukuai1@huaweicloud.com>
Commit author: Benjamin Marzinski<bmarzins@redhat.com>


Status in newer kernel trees:
6.12.y | Present (exact SHA1)
6.6.y | Not found

Note: The patch differs from the upstream commit:
---
1:  25b3a8237a03e ! 1:  64000dbb8dcf7 md/raid5: recheck if reshape has finished with device_lock held
    @@ Metadata
      ## Commit message ##
         md/raid5: recheck if reshape has finished with device_lock held
     
    +    commit 25b3a8237a03ec0b67b965b52d74862e77ef7115 upstream.
    +
         When handling an IO request, MD checks if a reshape is currently
         happening, and if so, where the IO sector is in relation to the reshape
         progress. MD uses conf->reshape_progress for both of these tasks.  When
    @@ Commit message
         Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
         Signed-off-by: Song Liu <song@kernel.org>
         Link: https://lore.kernel.org/r/20240702151802.1632010-1-bmarzins@redhat.com
    +    Signed-off-by: Yu Kuai <yukuai3@huawei.com>
     
      ## drivers/md/raid5.c ##
    -@@ drivers/md/raid5.c: static int add_all_stripe_bios(struct r5conf *conf,
    - 	return ret;
    +@@ drivers/md/raid5.c: static bool reshape_disabled(struct mddev *mddev)
    + 	return is_md_suspended(mddev) || !md_is_rdwr(mddev);
      }
      
     +enum reshape_loc {
---

Results of testing on various branches:

| Branch                    | Patch Apply | Build Test |
|---------------------------|-------------|------------|
| stable/linux-6.6.y        |  Success    |  Success   |
| stable/linux-6.1.y        |  Failed     |  N/A       |