Re: [PATCH 1/4] mm/memory-failure.c: move clear_hwpoisoned_pages

[Naoya Horiguchi <naoya.horiguchi@linux.dev>]

On Fri, Apr 29, 2022 at 10:22:03PM +0800, zhenwei pi wrote:
> clear_hwpoisoned_pages() clears HWPoison flag and decreases the number
> of poisoned pages, this actually works as part of memory failure.
> 
> Move this function from sparse.c to memory-failure.c, finally there
> is no CONFIG_MEMORY_FAILURE in sparse.c.
> 
> Cc: Wu Fengguang <fengguang.wu@intel.com>
> Signed-off-by: zhenwei pi <pizhenwei@bytedance.com>
> ---
>  mm/internal.h       | 11 +++++++++++
>  mm/memory-failure.c | 21 +++++++++++++++++++++
>  mm/sparse.c         | 27 ---------------------------
>  3 files changed, 32 insertions(+), 27 deletions(-)
> 
> diff --git a/mm/internal.h b/mm/internal.h
> index cf16280ce132..e8add8df4e0f 100644
> --- a/mm/internal.h
> +++ b/mm/internal.h
> @@ -758,4 +758,15 @@ struct folio *try_grab_folio(struct page *page, int refs, unsigned int flags);
>  
>  DECLARE_PER_CPU(struct per_cpu_nodestat, boot_nodestats);
>  
> +/*
> + * mm/memory-failure.c
> + */
> +#ifdef CONFIG_MEMORY_FAILURE
> +void clear_hwpoisoned_pages(struct page *memmap, int nr_pages);
> +#else
> +static inline void clear_hwpoisoned_pages(struct page *memmap, int nr_pages)
> +{
> +}
> +#endif

This code may be put near the definitions of hwpoison_filter* in mm/internal.h
because they are also called from mm/memory-failure.

Otherwise, looks good to me.

Acked-by: Naoya Horiguchi <naoya.horiguchi@nec.com>