Re: [PATCH 03/11] mm/sparse-vmemmap: open-code init_compound_tail()

[Qi Zheng]

On 8/31/26 3:53 PM, Muchun Song wrote:
> init_compound_tail() is only used by vmemmap_shared_tail_page(), where
> the shared tail page setup intentionally passes NULL as the compound head.
>
> Keeping this helper in mm/internal.h exposes that special case to the rest
> of the MM code and can make the NULL head argument look generally valid.
> Open-code the initialization at the only call site so the special-case use
> stays local to sparse vmemmap optimization.
>
> No functional change intended.
>
> Signed-off-by: Muchun Song <songmuchun@xxxxxxxxxxxxx>
> ---
>   mm/internal.h       | 9 ---------
>   mm/sparse-vmemmap.c | 5 ++++-
>   2 files changed, 4 insertions(+), 10 deletions(-)

Acked-by: Qi Zheng <qi.zheng@xxxxxxxxx>

Thanks,
Qi