+ swap-remove-some-calls-to-compound_head-in-swap_readpage.patch added to mm-unstable branch

+ swap-remove-some-calls-to-compound_head-in-swap_readpage.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: swap: remove some calls to compound_head() in swap_readpage()
has been added to the -mm mm-unstable branch.  Its filename is
     swap-remove-some-calls-to-compound_head-in-swap_readpage.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/swap-remove-some-calls-to-compound_head-in-swap_readpage.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: swap: remove some calls to compound_head() in swap_readpage()
Date: Sat, 15 Jul 2023 05:23:42 +0100

Replace six implicit calls to compound_head() with one call to
page_folio().

Link: https://lkml.kernel.org/r/20230715042343.434588-5-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Domenico Cerasuolo <cerasuolodomenico@gmail.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Nhat Pham <nphamcs@gmail.com>
Cc: Vitaly Wool <vitaly.wool@konsulko.com>
Cc: Yosry Ahmed <yosryahmed@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/page_io.c |   13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

--- a/mm/page_io.c~swap-remove-some-calls-to-compound_head-in-swap_readpage
+++ a/mm/page_io.c
@@ -495,14 +495,15 @@ static void swap_readpage_bdev_async(str
 
 void swap_readpage(struct page *page, bool synchronous, struct swap_iocb **plug)
 {
+	struct folio *folio = page_folio(page);
 	struct swap_info_struct *sis = page_swap_info(page);
-	bool workingset = PageWorkingset(page);
+	bool workingset = folio_test_workingset(folio);
 	unsigned long pflags;
 	bool in_thrashing;
 
-	VM_BUG_ON_PAGE(!PageSwapCache(page) && !synchronous, page);
-	VM_BUG_ON_PAGE(!PageLocked(page), page);
-	VM_BUG_ON_PAGE(PageUptodate(page), page);
+	VM_BUG_ON_FOLIO(!folio_test_swapcache(folio) && !synchronous, folio);
+	VM_BUG_ON_FOLIO(!folio_test_locked(folio), folio);
+	VM_BUG_ON_FOLIO(folio_test_uptodate(folio), folio);
 
 	/*
 	 * Count submission time as memory stall and delay. When the device
@@ -516,8 +517,8 @@ void swap_readpage(struct page *page, bo
 	delayacct_swapin_start();
 
 	if (zswap_load(page)) {
-		SetPageUptodate(page);
-		unlock_page(page);
+		folio_mark_uptodate(folio);
+		folio_unlock(folio);
 	} else if (data_race(sis->flags & SWP_FS_OPS)) {
 		swap_readpage_fs(page, plug);
 	} else if (synchronous || (sis->flags & SWP_SYNCHRONOUS_IO)) {
_

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

rmap-pass-the-folio-to-__page_check_anon_rmap.patch
highmem-add-memcpy_to_folio-and-memcpy_from_folio.patch
affs-convert-affs_symlink_read_folio-to-use-the-folio.patch
affs-convert-data-read-and-write-to-use-folios.patch
migrate-use-folio_set_bh-instead-of-set_bh_page.patch
ntfs3-convert-ntfs_get_block_vbo-to-use-a-folio.patch
jbd2-use-a-folio-in-jbd2_journal_write_metadata_buffer.patch
buffer-remove-set_bh_page.patch
zswap-make-zswap_store-take-a-folio.patch
memcg-convert-get_obj_cgroup_from_page-to-get_obj_cgroup_from_folio.patch
swap-remove-some-calls-to-compound_head-in-swap_readpage.patch
zswap-make-zswap_load-take-a-folio.patch