Re: [RFC PATCH 3/3] mm: Split page_has_private() in two to better handle PG_private_2

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On Fri, Apr 09, 2021 at 11:59:29AM +0100, David Howells wrote:
> diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c
> index 414769a6ad11..9c89db033548 100644
> --- a/fs/iomap/buffered-io.c
> +++ b/fs/iomap/buffered-io.c
> @@ -41,7 +41,7 @@ static inline struct iomap_page *to_iomap_page(struct page *page)
>  	 */
>  	VM_BUG_ON_PGFLAGS(PageTail(page), page);
>  
> -	if (page_has_private(page))
> +	if (page_needs_cleanup(page))

That should be PagePrivate(page)

>  		return (struct iomap_page *)page_private(page);
>  	return NULL;
>  }
> @@ -163,7 +163,7 @@ iomap_set_range_uptodate(struct page *page, unsigned off, unsigned len)
>  	if (PageError(page))
>  		return;
>  
> -	if (page_has_private(page))
> +	if (PagePrivate(page))
>  		iomap_iop_set_range_uptodate(page, off, len);
>  	else
>  		SetPageUptodate(page);
> @@ -502,7 +502,7 @@ iomap_migrate_page(struct address_space *mapping, struct page *newpage,
>  	if (ret != MIGRATEPAGE_SUCCESS)
>  		return ret;
>  
> -	if (page_has_private(page))
> +	if (PagePrivate(page))
>  		attach_page_private(newpage, detach_page_private(page));
>  
>  	if (mode != MIGRATE_SYNC_NO_COPY)

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