[PATCH 1/5] mm/workingset: remove unused @mapping argument in workingset_eviction()

[Andrey Ryabinin]

workingset_eviction() doesn't use and never did use the @mapping argument.
Remove it.

Signed-off-by: Andrey Ryabinin <aryabi...@virtuozzo.com>
Cc: Johannes Weiner <han...@cmpxchg.org>
Cc: Michal Hocko <mho...@kernel.org>
Cc: Vlastimil Babka <vba...@suse.cz>
Cc: Rik van Riel <r...@surriel.com>
Cc: Mel Gorman <mgor...@techsingularity.net>
---
 include/linux/swap.h | 2 +-
 mm/vmscan.c          | 2 +-
 mm/workingset.c      | 3 +--
 3 files changed, 3 insertions(+), 4 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..0906137760c5 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
  * 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);
-- 
2.19.2