+ mm-page_io-use-a-folio-in-swap_writepage_bdev_sync.patch added to mm-unstable branch

+ mm-page_io-use-a-folio-in-swap_writepage_bdev_sync.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: mm/page_io: use a folio in swap_writepage_bdev_sync()
has been added to the -mm mm-unstable branch.  Its filename is
     mm-page_io-use-a-folio-in-swap_writepage_bdev_sync.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-page_io-use-a-folio-in-swap_writepage_bdev_sync.patch

This patch will later appear in the mm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: ZhangPeng <zhangpeng362@huawei.com>
Subject: mm/page_io: use a folio in swap_writepage_bdev_sync()
Date: Fri, 21 Jul 2023 11:44:48 +0800

Saves one implicit call to compound_head().

Link: https://lkml.kernel.org/r/20230721034451.16412-8-zhangpeng362@huawei.com
Signed-off-by: ZhangPeng <zhangpeng362@huawei.com>
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: Nanyong Sun <sunnanyong@huawei.com>
Cc: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/page_io.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

--- a/mm/page_io.c~mm-page_io-use-a-folio-in-swap_writepage_bdev_sync
+++ a/mm/page_io.c
@@ -331,6 +331,7 @@ static void swap_writepage_bdev_sync(str
 {
 	struct bio_vec bv;
 	struct bio bio;
+	struct folio *folio = page_folio(page);
 
 	bio_init(&bio, sis->bdev, &bv, 1,
 		 REQ_OP_WRITE | REQ_SWAP | wbc_to_write_flags(wbc));
@@ -340,8 +341,8 @@ static void swap_writepage_bdev_sync(str
 	bio_associate_blkg_from_page(&bio, page);
 	count_swpout_vm_event(page);
 
-	set_page_writeback(page);
-	unlock_page(page);
+	folio_start_writeback(folio);
+	folio_unlock(folio);
 
 	submit_bio_wait(&bio);
 	__end_swap_bio_write(&bio);
_

Patches currently in -mm which might be from zhangpeng362@huawei.com are

mm-use-a-folio-in-fault_dirty_shared_page.patch
mm-remove-page_rmapping.patch
mm-page_io-remove-unneeded-clearpageuptodate.patch
mm-page_io-remove-unneeded-setpageerror.patch
mm-page_io-introduce-bio_first_folio_all.patch
mm-page_io-use-a-folio-in-__end_swap_bio_write.patch
mm-page_io-use-a-folio-in-__end_swap_bio_read.patch
mm-page_io-use-a-folio-in-sio_read_complete.patch
mm-page_io-use-a-folio-in-swap_writepage_bdev_sync.patch
mm-page_io-use-a-folio-in-swap_writepage_bdev_async.patch
mm-page_io-convert-count_swpout_vm_event-to-take-in-a-folio.patch
mm-page_io-convert-bio_associate_blkg_from_page-to-take-in-a-folio.patch