The patch titled
Subject: mm: replace multiple dcache flush with flush_dcache_folio()
has been added to the -mm tree. Its filename is
mm-replace-multiple-dcache-flush-with-flush_dcache_folio.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-replace-multiple-dcache-flush-with-flush_dcache_folio.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-replace-multiple-dcache-flush-with-flush_dcache_folio.patch
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------------------------------------------------------
From: Muchun Song <songmuchun@xxxxxxxxxxxxx>
Subject: mm: replace multiple dcache flush with flush_dcache_folio()
Simplify the code by using flush_dcache_folio().
Link: https://lkml.kernel.org/r/20220131160254.43211-6-songmuchun@xxxxxxxxxxxxx
Signed-off-by: Muchun Song <songmuchun@xxxxxxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Cc: Lars Persson <lars.persson@xxxxxxxx>
Cc: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Cc: Mina Almasry <almasrymina@xxxxxxxxxx>
Cc: Xiongchun Duan <duanxiongchun@xxxxxxxxxxxxx>
Cc: Zi Yan <ziy@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/hugetlb.c | 6 +-----
mm/migrate.c | 8 ++------
2 files changed, 3 insertions(+), 11 deletions(-)
--- a/mm/hugetlb.c~mm-replace-multiple-dcache-flush-with-flush_dcache_folio
+++ a/mm/hugetlb.c
@@ -5804,8 +5804,6 @@ int hugetlb_mcopy_atomic_pte(struct mm_s
goto out;
}
} else {
- int i, nr;
-
if (vm_shared &&
hugetlbfs_pagecache_present(h, dst_vma, dst_addr)) {
put_page(*pagep);
@@ -5821,9 +5819,7 @@ int hugetlb_mcopy_atomic_pte(struct mm_s
goto out;
}
folio_copy(page_folio(page), page_folio(*pagep));
- nr = compound_nr(page);
- for (i = 0; i < nr; i++)
- flush_dcache_page(page + i);
+ flush_dcache_folio(page_folio(page));
put_page(*pagep);
*pagep = NULL;
}
--- a/mm/migrate.c~mm-replace-multiple-dcache-flush-with-flush_dcache_folio
+++ a/mm/migrate.c
@@ -916,12 +916,8 @@ static int move_to_new_page(struct page
if (!PageMappingFlags(page))
page->mapping = NULL;
- if (likely(!is_zone_device_page(newpage))) {
- int i, nr = compound_nr(newpage);
-
- for (i = 0; i < nr; i++)
- flush_dcache_page(newpage + i);
- }
+ if (likely(!is_zone_device_page(newpage)))
+ flush_dcache_folio(page_folio(newpage));
}
out:
return rc;
_
Patches currently in -mm which might be from songmuchun@xxxxxxxxxxxxx are
mm-thp-fix-wrong-cache-flush-in-remove_migration_pmd.patch
mm-fix-missing-cache-flush-for-all-tail-pages-of-compound-page.patch
mm-hugetlb-fix-missing-cache-flush-in-copy_huge_page_from_user.patch
mm-hugetlb-fix-missing-cache-flush-in-hugetlb_mcopy_atomic_pte.patch
mm-replace-multiple-dcache-flush-with-flush_dcache_folio.patch
mm-hugetlb-free-the-2nd-vmemmap-page-associated-with-each-hugetlb-page.patch
mm-hugetlb-replace-hugetlb_free_vmemmap_enabled-with-a-static_key.patch
mm-sparsemem-use-page-table-lock-to-protect-kernel-pmd-operations.patch
selftests-vm-add-a-hugetlb-test-case.patch
mm-sparsemem-move-vmemmap-related-to-hugetlb-to-config_hugetlb_page_free_vmemmap.patch
