From 575ced1c8b0d3b578b933a68ce67ddaff3df9506 Mon Sep 17 00:00:00 2001
From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Date: Tue, 8 Dec 2020 01:25:39 -0500
Subject: mm/swap: Add folio_rotate_reclaimable()

Convert rotate_reclaimable_page() to folio_rotate_reclaimable().  This
eliminates all five of the calls to compound_head() in this function,
saving 75 bytes at the cost of adding 15 bytes to its one caller,
end_page_writeback().  We also save 36 bytes from pagevec_move_tail_fn()
due to using folios there.  Net 96 bytes savings.

Also move its declaration to mm/internal.h as it's only used by filemap.c.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Reviewed-by: William Kucharski <william.kucharski@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Mike Rapoport <rppt@linux.ibm.com>
Reviewed-by: David Howells <dhowells@redhat.com>
---
 mm/filemap.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'mm/filemap.c')

diff --git a/mm/filemap.c b/mm/filemap.c
index 706d121ca9cc..6a5bdb4f7c73 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -1584,8 +1584,9 @@ void end_page_writeback(struct page *page)
 	 * ever page writeback.
 	 */
 	if (PageReclaim(page)) {
+		struct folio *folio = page_folio(page);
 		ClearPageReclaim(page);
-		rotate_reclaimable_page(page);
+		folio_rotate_reclaimable(folio);
 	}
 
 	/*
-- 
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