+ gfs2-convert-gfs2_write_jdata_page-to-gfs2_write_jdata_folio.patch added to mm-unstable branch

[Andrew Morton <akpm@linux-foundation.org>]

The patch titled
     Subject: gfs2: convert gfs2_write_jdata_page() to gfs2_write_jdata_folio()
has been added to the -mm mm-unstable branch.  Its filename is
     gfs2-convert-gfs2_write_jdata_page-to-gfs2_write_jdata_folio.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/gfs2-convert-gfs2_write_jdata_page-to-gfs2_write_jdata_folio.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: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Subject: gfs2: convert gfs2_write_jdata_page() to gfs2_write_jdata_folio()
Date: Mon, 12 Jun 2023 22:01:30 +0100

Add support for large folios and remove some accesses to page->mapping and
page->index.

Link: https://lkml.kernel.org/r/20230612210141.730128-4-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Tested-by: Bob Peterson <rpeterso@redhat.com>
Reviewed-by: Bob Peterson <rpeterso@redhat.com>
Reviewed-by: Andreas Gruenbacher <agruenba@redhat.com>
Cc: Hannes Reinecke <hare@suse.com>
Cc: Luis Chamberlain <mcgrof@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 fs/gfs2/aops.c |   26 +++++++++++++-------------
 1 file changed, 13 insertions(+), 13 deletions(-)

--- a/fs/gfs2/aops.c~gfs2-convert-gfs2_write_jdata_page-to-gfs2_write_jdata_folio
+++ a/fs/gfs2/aops.c
@@ -82,33 +82,33 @@ static int gfs2_get_block_noalloc(struct
 }
 
 /**
- * gfs2_write_jdata_page - gfs2 jdata-specific version of block_write_full_page
- * @page: The page to write
+ * gfs2_write_jdata_folio - gfs2 jdata-specific version of block_write_full_page
+ * @folio: The folio to write
  * @wbc: The writeback control
  *
  * This is the same as calling block_write_full_page, but it also
  * writes pages outside of i_size
  */
-static int gfs2_write_jdata_page(struct page *page,
+static int gfs2_write_jdata_folio(struct folio *folio,
 				 struct writeback_control *wbc)
 {
-	struct inode * const inode = page->mapping->host;
+	struct inode * const inode = folio->mapping->host;
 	loff_t i_size = i_size_read(inode);
-	const pgoff_t end_index = i_size >> PAGE_SHIFT;
-	unsigned offset;
 
 	/*
-	 * The page straddles i_size.  It must be zeroed out on each and every
+	 * The folio straddles i_size.  It must be zeroed out on each and every
 	 * writepage invocation because it may be mmapped.  "A file is mapped
 	 * in multiples of the page size.  For a file that is not a multiple of
-	 * the  page size, the remaining memory is zeroed when mapped, and
+	 * the page size, the remaining memory is zeroed when mapped, and
 	 * writes to that region are not written out to the file."
 	 */
-	offset = i_size & (PAGE_SIZE - 1);
-	if (page->index == end_index && offset)
-		zero_user_segment(page, offset, PAGE_SIZE);
+	if (folio_pos(folio) < i_size &&
+	    i_size < folio_pos(folio) + folio_size(folio))
+		folio_zero_segment(folio, offset_in_folio(folio, i_size),
+				folio_size(folio));
 
-	return __block_write_full_page(inode, page, gfs2_get_block_noalloc, wbc,
+	return __block_write_full_page(inode, &folio->page,
+				       gfs2_get_block_noalloc, wbc,
 				       end_buffer_async_write);
 }
 
@@ -137,7 +137,7 @@ static int __gfs2_jdata_write_folio(stru
 		}
 		gfs2_trans_add_databufs(ip, folio, 0, folio_size(folio));
 	}
-	return gfs2_write_jdata_page(&folio->page, wbc);
+	return gfs2_write_jdata_folio(folio, wbc);
 }
 
 /**
_

Patches currently in -mm which might be from willy@infradead.org are

gfs2-use-a-folio-inside-gfs2_jdata_writepage.patch
gfs2-pass-a-folio-to-__gfs2_jdata_write_folio.patch
gfs2-convert-gfs2_write_jdata_page-to-gfs2_write_jdata_folio.patch
buffer-convert-__block_write_full_page-to-__block_write_full_folio.patch
gfs2-support-ludicrously-large-folios-in-gfs2_trans_add_databufs.patch
buffer-make-block_write_full_page-handle-large-folios-correctly.patch
buffer-convert-block_page_mkwrite-to-use-a-folio.patch
buffer-convert-__block_commit_write-to-take-a-folio.patch
buffer-convert-page_zero_new_buffers-to-folio_zero_new_buffers.patch
buffer-convert-grow_dev_page-to-use-a-folio.patch
buffer-convert-init_page_buffers-to-folio_init_buffers.patch
buffer-convert-link_dev_buffers-to-take-a-folio.patch
buffer-use-a-folio-in-__find_get_block_slow.patch
buffer-convert-block_truncate_page-to-use-a-folio.patch