+ mm-page_io-remove-unneeded-clearpageuptodate.patch added to mm-unstable branch

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The patch titled
     Subject: mm/page_io: remove unneeded ClearPageUptodate()
has been added to the -mm mm-unstable branch.  Its filename is
     mm-page_io-remove-unneeded-clearpageuptodate.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-remove-unneeded-clearpageuptodate.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@xxxxxxxxxx>
Subject: mm/page_io: remove unneeded ClearPageUptodate()
Date: Fri, 21 Jul 2023 11:44:42 +0800

Patch series "Convert several functions in page_io.c to use a folio", v4.

Convert several functions in page_io.c to use a folio, which can remove
several implicit calls to compound_head().


This patch (of 10):

The VM_BUG_ON_FOLIO in swap_readpage() ensures that the page is already
!uptodate in __end_swap_bio_read() and sio_read_complete().  Just remove
unneeded ClearPageUptodate().

Link: https://lkml.kernel.org/r/20230721034451.16412-1-zhangpeng362@xxxxxxxxxx
Link: https://lkml.kernel.org/r/20230721034451.16412-2-zhangpeng362@xxxxxxxxxx
Signed-off-by: ZhangPeng <zhangpeng362@xxxxxxxxxx>
Suggested-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Cc: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx>
Cc: Nanyong Sun <sunnanyong@xxxxxxxxxx>
Cc: Sidhartha Kumar <sidhartha.kumar@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---

 mm/page_io.c |    2 --
 1 file changed, 2 deletions(-)

--- a/mm/page_io.c~mm-page_io-remove-unneeded-clearpageuptodate
+++ a/mm/page_io.c
@@ -62,7 +62,6 @@ static void __end_swap_bio_read(struct b
 
 	if (bio->bi_status) {
 		SetPageError(page);
-		ClearPageUptodate(page);
 		pr_alert_ratelimited("Read-error on swap-device (%u:%u:%llu)\n",
 				     MAJOR(bio_dev(bio)), MINOR(bio_dev(bio)),
 				     (unsigned long long)bio->bi_iter.bi_sector);
@@ -417,7 +416,6 @@ static void sio_read_complete(struct kio
 			struct page *page = sio->bvec[p].bv_page;
 
 			SetPageError(page);
-			ClearPageUptodate(page);
 			unlock_page(page);
 		}
 		pr_alert_ratelimited("Read-error on swap-device\n");
_

Patches currently in -mm which might be from zhangpeng362@xxxxxxxxxx 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




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