Re: [PATCH v4 6/7] mm: Use for_each_valid_pfn() in memory_hotplug

[David Hildenbrand]

On 23.04.25 15:33, David Woodhouse wrote:
> From: David Woodhouse <dwmw@xxxxxxxxxxxx>
>
> Signed-off-by: David Woodhouse <dwmw@xxxxxxxxxxxx>
> Acked-by: Mike Rapoport (Microsoft) <rppt@xxxxxxxxxx>
> ---
>   mm/memory_hotplug.c | 8 ++------
>   1 file changed, 2 insertions(+), 6 deletions(-)
>
> diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
> index 8305483de38b..8f74c55137bf 100644
> --- a/mm/memory_hotplug.c
> +++ b/mm/memory_hotplug.c
> @@ -1756,12 +1756,10 @@ static int scan_movable_pages(unsigned long start, unsigned long end,
>   {
>   	unsigned long pfn;
>   
> -	for (pfn = start; pfn < end; pfn++) {
> +	for_each_valid_pfn (pfn, start, end) {

                          ^

>   		struct page *page;
>   		struct folio *folio;
>   
> -		if (!pfn_valid(pfn))
> -			continue;
>   		page = pfn_to_page(pfn);
>   		if (PageLRU(page))
>   			goto found;
> @@ -1805,11 +1803,9 @@ static void do_migrate_range(unsigned long start_pfn, unsigned long end_pfn)
>   	static DEFINE_RATELIMIT_STATE(migrate_rs, DEFAULT_RATELIMIT_INTERVAL,
>   				      DEFAULT_RATELIMIT_BURST);
>   
> -	for (pfn = start_pfn; pfn < end_pfn; pfn++) {
> +	for_each_valid_pfn (pfn, start_pfn, end_pfn) {

			  ^

Is there a reason for this space that I am unaware of? :)

Acked-by: David Hildenbrand <david@xxxxxxxxxx>

--
Cheers,

David / dhildenb