+ mm-memory-use-a-folio-in-validate_page_before_insert.patch added to mm-unstable branch

+ mm-memory-use-a-folio-in-validate_page_before_insert.patch added to mm-unstable branch

[Andrew Morton]

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

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-memory-use-a-folio-in-validate_page_before_insert.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: Kefeng Wang <wangkefeng.wang@huawei.com>
Subject: mm: memory: use a folio in validate_page_before_insert()
Date: Sat, 18 Nov 2023 10:32:29 +0800

Use a folio in validate_page_before_insert() to save two compound_head()
calls.

Link: https://lkml.kernel.org/r/20231118023232.1409103-3-wangkefeng.wang@huawei.com
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Reviewed-by: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Vishal Moola (Oracle) <vishal.moola@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/memory.c |    7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

--- a/mm/memory.c~mm-memory-use-a-folio-in-validate_page_before_insert
+++ a/mm/memory.c
@@ -1842,9 +1842,12 @@ pte_t *__get_locked_pte(struct mm_struct
 
 static int validate_page_before_insert(struct page *page)
 {
-	if (PageAnon(page) || PageSlab(page) || page_has_type(page))
+	struct folio *folio = page_folio(page);
+
+	if (folio_test_anon(folio) || folio_test_slab(folio) ||
+	    page_has_type(page))
 		return -EINVAL;
-	flush_dcache_page(page);
+	flush_dcache_folio(folio);
 	return 0;
 }
 
_

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

mm-ksm-use-more-folio-api-in-ksm_might_need_to_copy.patch
mm-memory-use-a-folio-in-validate_page_before_insert.patch
mm-memory-rename-page_copy_prealloc-to-folio_prealloc.patch
mm-memory-use-a-folio-in-do_cow_fault.patch
mm-memory-use-folio_prealloc-in-wp_page_copy.patch