mm/vmscan.c: remove unused scan_control parameter from pageout()

Since lumpy reclaim was removed in v3.5 scan_control is not used by
may_write_to_{queue|inode} and pageout() anymore, remove the unused
parameter.

Link: http://lkml.kernel.org/r/1570124498-19300-1-git-send-email-yang.shi@linux.alibaba.com
Signed-off-by: Yang Shi <yang.shi@linux.alibaba.com>
Acked-by: David Rientjes <rientjes@google.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/vmscan.c b/mm/vmscan.c
index f7b598b..44f5c54 100644 (file)
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -775,7 +775,7 @@ static inline int is_page_cache_freeable(struct page *page)
        return page_count(page) - page_has_private(page) == 1 + page_cache_pins;
 }
 
-static int may_write_to_inode(struct inode *inode, struct scan_control *sc)
+static int may_write_to_inode(struct inode *inode)
 {
        if (current->flags & PF_SWAPWRITE)
                return 1;
@@ -823,8 +823,7 @@ typedef enum {
  * pageout is called by shrink_page_list() for each dirty page.
  * Calls ->writepage().
  */
-static pageout_t pageout(struct page *page, struct address_space *mapping,
-                        struct scan_control *sc)
+static pageout_t pageout(struct page *page, struct address_space *mapping)
 {
        /*
         * If the page is dirty, only perform writeback if that write
@@ -860,7 +859,7 @@ static pageout_t pageout(struct page *page, struct address_space *mapping,
        }
        if (mapping->a_ops->writepage == NULL)
                return PAGE_ACTIVATE;
-       if (!may_write_to_inode(mapping->host, sc))
+       if (!may_write_to_inode(mapping->host))
                return PAGE_KEEP;
 
        if (clear_page_dirty_for_io(page)) {
@@ -1394,7 +1393,7 @@ static unsigned long shrink_page_list(struct list_head *page_list,
                         * starts and then write it out here.
                         */
                        try_to_unmap_flush_dirty();
-                       switch (pageout(page, mapping, sc)) {
+                       switch (pageout(page, mapping)) {
                        case PAGE_KEEP:
                                goto keep_locked;
                        case PAGE_ACTIVATE: