On 2/28/19 9:33 AM, Andrey Ryabinin wrote:
> workingset_eviction() doesn't use and never did use the @mapping argument.
> Remove it.
>
> Signed-off-by: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>
> Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx>
> Acked-by: Rik van Riel <riel@xxxxxxxxxxx>
Acked-by: Vlastimil Babka <vbabka@xxxxxxx>
> Cc: Michal Hocko <mhocko@xxxxxxxxxx>
> Cc: Vlastimil Babka <vbabka@xxxxxxx>
> Cc: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx>
> ---
>
> Changes since v1:
> - s/@mapping/@page->mapping in comment
> - Acks
>
> include/linux/swap.h | 2 +-
> mm/vmscan.c | 2 +-
> mm/workingset.c | 5 ++---
> 3 files changed, 4 insertions(+), 5 deletions(-)
>
> diff --git a/include/linux/swap.h b/include/linux/swap.h
> index 649529be91f2..fc50e21b3b88 100644
> --- a/include/linux/swap.h
> +++ b/include/linux/swap.h
> @@ -307,7 +307,7 @@ struct vma_swap_readahead {
> };
>
> /* linux/mm/workingset.c */
> -void *workingset_eviction(struct address_space *mapping, struct page *page);
> +void *workingset_eviction(struct page *page);
> void workingset_refault(struct page *page, void *shadow);
> void workingset_activation(struct page *page);
>
> diff --git a/mm/vmscan.c b/mm/vmscan.c
> index ac4806f0f332..a9852ed7b97f 100644
> --- a/mm/vmscan.c
> +++ b/mm/vmscan.c
> @@ -952,7 +952,7 @@ static int __remove_mapping(struct address_space *mapping, struct page *page,
> */
> if (reclaimed && page_is_file_cache(page) &&
> !mapping_exiting(mapping) && !dax_mapping(mapping))
> - shadow = workingset_eviction(mapping, page);
> + shadow = workingset_eviction(page);
> __delete_from_page_cache(page, shadow);
> xa_unlock_irqrestore(&mapping->i_pages, flags);
>
> diff --git a/mm/workingset.c b/mm/workingset.c
> index dcb994f2acc2..0bedf67502d5 100644
> --- a/mm/workingset.c
> +++ b/mm/workingset.c
> @@ -215,13 +215,12 @@ static void unpack_shadow(void *shadow, int *memcgidp, pg_data_t **pgdat,
>
> /**
> * workingset_eviction - note the eviction of a page from memory
> - * @mapping: address space the page was backing
> * @page: the page being evicted
> *
> - * Returns a shadow entry to be stored in @mapping->i_pages in place
> + * Returns a shadow entry to be stored in @page->mapping->i_pages in place
> * of the evicted @page so that a later refault can be detected.
> */
> -void *workingset_eviction(struct address_space *mapping, struct page *page)
> +void *workingset_eviction(struct page *page)
> {
> struct pglist_data *pgdat = page_pgdat(page);
> struct mem_cgroup *memcg = page_memcg(page);
>
