Re: [PATCH v1 04/11] mm/memremap: convert to pfnmap_track() + pfnmap_untrack()

[Peter Xu]

On Fri, Apr 25, 2025 at 10:17:08AM +0200, David Hildenbrand wrote:
> Let's use the new, cleaner interface.
> 
> Signed-off-by: David Hildenbrand <david@xxxxxxxxxx>
> ---
>  mm/memremap.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/mm/memremap.c b/mm/memremap.c
> index 2aebc1b192da9..c417c843e9b1f 100644
> --- a/mm/memremap.c
> +++ b/mm/memremap.c
> @@ -130,7 +130,7 @@ static void pageunmap_range(struct dev_pagemap *pgmap, int range_id)
>  	}
>  	mem_hotplug_done();
>  
> -	untrack_pfn(NULL, PHYS_PFN(range->start), range_len(range), true);
> +	pfnmap_untrack(PHYS_PFN(range->start), range_len(range));
>  	pgmap_array_delete(range);
>  }
>  
> @@ -211,8 +211,8 @@ static int pagemap_range(struct dev_pagemap *pgmap, struct mhp_params *params,
>  	if (nid < 0)
>  		nid = numa_mem_id();
>  
> -	error = track_pfn_remap(NULL, &params->pgprot, PHYS_PFN(range->start), 0,
> -			range_len(range));
> +	error = pfnmap_track(PHYS_PFN(range->start), range_len(range),
> +			     &params->pgprot);
>  	if (error)
>  		goto err_pfn_remap;
>  
> @@ -277,7 +277,7 @@ static int pagemap_range(struct dev_pagemap *pgmap, struct mhp_params *params,
>  	if (!is_private)
>  		kasan_remove_zero_shadow(__va(range->start), range_len(range));
>  err_kasan:
> -	untrack_pfn(NULL, PHYS_PFN(range->start), range_len(range), true);
> +	pfnmap_untrack(PHYS_PFN(range->start), range_len(range));

Not a huge deal, but maybe we could merge this and previous patch?  It
might be easier to reference the impl when reading the call site changes.

>  err_pfn_remap:
>  	pgmap_array_delete(range);
>  	return error;
> -- 
> 2.49.0
> 

-- 
Peter Xu