[Devel] [PATCH vz8 02/15] 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.

Link: http://lkml.kernel.org/r/20190228083329.31892-1-aryabinin@virtuozzo.com
Signed-off-by: Andrey Ryabinin <aryabinin at virtuozzo.com>
Acked-by: Johannes Weiner <hannes at cmpxchg.org>
Acked-by: Rik van Riel <riel at surriel.com>
Acked-by: Vlastimil Babka <vbabka at suse.cz>
Acked-by: Mel Gorman <mgorman at techsingularity.net>
Cc: Michal Hocko <mhocko at kernel.org>
Cc: William Kucharski <william.kucharski at oracle.com>
Cc: John Hubbard <jhubbard at nvidia.com>
Signed-off-by: Andrew Morton <akpm at linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds at linux-foundation.org>

(cherry picked from commit a7ca12f9d905e7437dd3beb9cbb8e85bc2b991f4)
Signed-off-by: Andrey Ryabinin <aryabinin at virtuozzo.com>
---
 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 ac9aad8f87fe..914c5ee9eadd 100644
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -299,7 +299,7 @@ struct vma_swap_readahead {
 };
 
 /* linux/mm/workingset.c */
-void *workingset_eviction(struct address_space *mapping, struct page *page);
+void *workingset_eviction(struct page *page);
 bool workingset_refault(void *shadow);
 void workingset_activation(struct page *page);
 
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 7e90425d75b1..9674df2d274d 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -783,7 +783,7 @@ 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 40ee02c83978..0d666cdba8b9 100644
--- a/mm/workingset.c
+++ b/mm/workingset.c
@@ -199,13 +199,12 @@ 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 mem_cgroup *memcg = page_memcg(page);
 	struct pglist_data *pgdat = page_pgdat(page);
-- 
2.24.1