mm/rmap: Constify the rmap_walk_control argument

The rmap walking functions do not modify the rmap_walk_control, and
page_idle_clear_pte_refs() takes advantage of that to move construction
of the rmap_walk_control to compile time.  This lets us remove an
unclean cast.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/mm/page_idle.c b/mm/page_idle.c
index e34ba04e22e2..fc0435abf909 100644
--- a/mm/page_idle.c
+++ b/mm/page_idle.c
@@ -103,7 +103,7 @@ static void page_idle_clear_pte_refs(struct page *page)
 	if (need_lock && !folio_trylock(folio))
 		return;
 
-	rmap_walk(folio, (struct rmap_walk_control *)&rwc);
+	rmap_walk(folio, &rwc);
 
 	if (need_lock)
 		folio_unlock(folio);