Re: [PATCH 01/19] btrfs: require at least 4 devices for RAID 6

Hello:

This series was applied to riscv/linux.git (fixes)
by Andrew Morton [off-list ref]:

On Tue, 12 May 2026 07:20:41 +0200 you wrote:

While the RAID6 algorithm could in theory support 3 devices by just
copying the data disk to the two parity disks, this version is not only
useless because it is a suboptimal version of 3-way mirroring, but also
broken with various crashes and incorrect parity generation in various
architecture-optimized implementations.  Disallow it similar to mdraid
which requires at least 4 devices for RAID 6.

[...]

Here is the summary with links:
  - [01/19] btrfs: require at least 4 devices for RAID 6
    (no matching commit)
  - [02/19] raid6: turn the userspace test harness into a kunit test
    (no matching commit)
  - [03/19] raid6: remove __KERNEL__ ifdefs
    https://git.kernel.org/riscv/c/3d6beb659ddf
  - [04/19] raid6: move to lib/raid/
    (no matching commit)
  - [05/19] raid6: remove unused defines in pq.h
    https://git.kernel.org/riscv/c/06d2a66fb7c0
  - [06/19] raid6: remove raid6_get_zero_page
    https://git.kernel.org/riscv/c/885d31423183
  - [07/19] raid6: use named initializers for struct raid6_calls
    https://git.kernel.org/riscv/c/7e91f76a9668
  - [08/19] raid6: improve the public interface
    (no matching commit)
  - [09/19] raid6: hide internals
    (no matching commit)
  - [10/19] raid6: rework the init helpers
    (no matching commit)
  - [11/19] raid6: use static_call for gen_syndrom and xor_syndrom
    https://git.kernel.org/riscv/c/10f4b8e2a164
  - [12/19] raid6: use static_call for raid6_recov_2data and raid6_recov_datap
    (no matching commit)
  - [13/19] raid6: update top of file comments
    https://git.kernel.org/riscv/c/30bf04bd13a5
  - [14/19] raid6_kunit: use KUNIT_CASE_PARAM
    https://git.kernel.org/riscv/c/2175395f76c3
  - [15/19] raid6_kunit: dynamically allocate data buffers using vmalloc
    https://git.kernel.org/riscv/c/d67c25712fe3
  - [16/19] raid6_kunit: cleanup dataptr handling
    https://git.kernel.org/riscv/c/562bcbfcb99b
  - [17/19] raid6_kunit: randomize parameters and increase limits
    (no matching commit)
  - [18/19] raid6_kunit: randomize parameters and increase limits
    (no matching commit)
  - [19/19] raid6_kunit: randomize buffer alignment
    https://git.kernel.org/riscv/c/8cf0a6c4bb9e

You are awesome, thank you!
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