Re: [Xen-devel] [PATCH 26/34] mm/gup_benchmark.c: convert put_page() to put_user_page*()

[Keith Busch <keith.busch@xxxxxxxxx>]

On Thu, Aug 01, 2019 at 07:19:57PM -0700, john.hubbard@xxxxxxxxx wrote:
> From: John Hubbard <jhubbard@xxxxxxxxxx>
> 
> For pages that were retained via get_user_pages*(), release those pages
> via the new put_user_page*() routines, instead of via put_page() or
> release_pages().
> 
> This is part a tree-wide conversion, as described in commit fc1d8e7cca2d
> ("mm: introduce put_user_page*(), placeholder versions").
> 
> Cc: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
> Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> Cc: Keith Busch <keith.busch@xxxxxxxxx>
> Cc: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
> Cc: Michael S. Tsirkin <mst@xxxxxxxxxx>
> Cc: YueHaibing <yuehaibing@xxxxxxxxxx>
> Signed-off-by: John Hubbard <jhubbard@xxxxxxxxxx>

Looks fine.

Reviewed-by: Keith Busch <keith.busch@xxxxxxxxx>

>  mm/gup_benchmark.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/mm/gup_benchmark.c b/mm/gup_benchmark.c
> index 7dd602d7f8db..515ac8eeb6ee 100644
> --- a/mm/gup_benchmark.c
> +++ b/mm/gup_benchmark.c
> @@ -79,7 +79,7 @@ static int __gup_benchmark_ioctl(unsigned int cmd,
>       for (i = 0; i < nr_pages; i++) {
>               if (!pages[i])
>                       break;
> -             put_page(pages[i]);
> +             put_user_page(pages[i]);
>       }
>       end_time = ktime_get();
>       gup->put_delta_usec = ktime_us_delta(end_time, start_time);
> -- 

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