+ mpage-use-folios-in-bio-end_io-handler.patch added to mm-unstable branch

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The patch titled
     Subject: mpage: use folios in bio end_io handler
has been added to the -mm mm-unstable branch.  Its filename is
     mpage-use-folios-in-bio-end_io-handler.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mpage-use-folios-in-bio-end_io-handler.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: Pankaj Raghav <p.raghav@xxxxxxxxxxx>
Subject: mpage: use folios in bio end_io handler
Date: Tue, 11 Apr 2023 14:29:20 +0200

Use folios in the bio end_io handler.  This conversion does the
appropriate handling on the folios in the respective end_io callback and
removes the call to page_endio(), which is soon to be removed.

Link: https://lkml.kernel.org/r/20230411122920.30134-4-p.raghav@xxxxxxxxxxx
Signed-off-by: Pankaj Raghav <p.raghav@xxxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Cc: Alexander Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Christian Brauner <brauner@xxxxxxxxxx>
Cc: Jens Axboe <axboe@xxxxxxxxx>
Cc: Luis Chamberlain <mcgrof@xxxxxxxxxx>
Cc: Martin Brandenburg <martin@xxxxxxxxxxxx>
Cc: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Cc: Mike Marshall <hubcap@xxxxxxxxxxxx>
Cc: Minchan Kim <minchan@xxxxxxxxxx>
Cc: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---

 fs/mpage.c |   28 ++++++++++++++++++----------
 1 file changed, 18 insertions(+), 10 deletions(-)

--- a/fs/mpage.c~mpage-use-folios-in-bio-end_io-handler
+++ a/fs/mpage.c
@@ -45,24 +45,32 @@
  */
 static void mpage_read_end_io(struct bio *bio)
 {
-	struct bio_vec *bv;
-	struct bvec_iter_all iter_all;
+	struct folio_iter fi;
+	int err = blk_status_to_errno(bio->bi_status);
 
-	bio_for_each_segment_all(bv, bio, iter_all)
-		page_endio(bv->bv_page, REQ_OP_READ,
-			   blk_status_to_errno(bio->bi_status));
+	bio_for_each_folio_all(fi, bio) {
+		if (err)
+			folio_set_error(fi.folio);
+		else
+			folio_mark_uptodate(fi.folio);
+		folio_unlock(fi.folio);
+	}
 
 	bio_put(bio);
 }
 
 static void mpage_write_end_io(struct bio *bio)
 {
-	struct bio_vec *bv;
-	struct bvec_iter_all iter_all;
+	struct folio_iter fi;
+	int err = blk_status_to_errno(bio->bi_status);
 
-	bio_for_each_segment_all(bv, bio, iter_all)
-		page_endio(bv->bv_page, REQ_OP_WRITE,
-			   blk_status_to_errno(bio->bi_status));
+	bio_for_each_folio_all(fi, bio) {
+		if (err) {
+			folio_set_error(fi.folio);
+			mapping_set_error(fi.folio->mapping, err);
+		}
+		folio_end_writeback(fi.folio);
+	}
 
 	bio_put(bio);
 }
_

Patches currently in -mm which might be from p.raghav@xxxxxxxxxxx are

orangefs-use-folios-in-orangefs_readahead.patch
mpage-split-submit_bio-and-bio-end_io-handler-for-reads-and-writes.patch
mpage-use-folios-in-bio-end_io-handler.patch




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