Re: [PATCH v6 3/4] mm: huge_memory: refactor enabled_store() with change_enabled()

[Lance Yang <lance.yang@linux.dev>]

On 2026/3/11 18:17, Breno Leitao wrote:
> Refactor enabled_store() to use a new change_enabled() helper.
> Introduce a separate enum global_enabled_mode and
> global_enabled_mode_strings[], mirroring the anon_enabled_mode
> pattern from the previous commit.
> 
> A separate enum is necessary because the global THP setting does
> not support "inherit", only "always", "madvise", and "never".
> Reusing anon_enabled_mode would leave a NULL gap in the string
> array, causing sysfs_match_string() to stop early and fail to
> match entries after the gap.
> 
> The helper uses the same loop pattern as set_anon_enabled_mode(),
> iterating over an array of flag bit positions and using
> __test_and_set_bit()/__test_and_clear_bit() to track whether the state
> actually changed.
> 
> Reviewed-by: Lorenzo Stoakes (Oracle) <ljs@kernel.org>
> Reviewed-by: Zi Yan <ziy@nvidia.com>
> Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>
> Reviewed-by: Wei Yang <richard.weiyang@gmail.com>
> Signed-off-by: Breno Leitao <leitao@debian.org>
> ---

Thanks!

Tested-by: Lance Yang <lance.yang@linux.dev>