[072/227] mm: replace multiple dcache flush with flush_dcache_folio()

Commit Message

Andrew Morton March 22, 2022, 9:42 p.m. UTC

From: Muchun Song <[e-mail]>
Subject: mm: replace multiple dcache flush with flush_dcache_folio()

Simplify the code by using flush_dcache_folio().

Link: https://lkml.kernel.org/r/[e-mail]
Signed-off-by: Muchun Song <[e-mail]>
Reviewed-by: Mike Kravetz <[e-mail]>
Cc: Axel Rasmussen <[e-mail]>
Cc: David Rientjes <[e-mail]>
Cc: Fam Zheng <[e-mail]>
Cc: Kirill A. Shutemov <[e-mail]>
Cc: Lars Persson <[e-mail]>
Cc: Peter Xu <[e-mail]>
Cc: Xiongchun Duan <[e-mail]>
Cc: Zi Yan <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
---

 mm/migrate.c |    8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

Patch

--- a/mm/migrate.c~mm-replace-multiple-dcache-flush-with-flush_dcache_folio
+++ a/mm/migrate.c
@@ -916,12 +916,8 @@  static int move_to_new_page(struct page
 		if (!PageMappingFlags(page))
 			page->mapping = NULL;
 
-		if (likely(!is_zone_device_page(newpage))) {
-			int i, nr = compound_nr(newpage);
-
-			for (i = 0; i < nr; i++)
-				flush_dcache_page(newpage + i);
-		}
+		if (likely(!is_zone_device_page(newpage)))
+			flush_dcache_folio(page_folio(newpage));
 	}
 out:
 	return rc;