+ arm64-mm-hugetlb-enable-hugetlb_page_free_vmemmap-for-arm64-fix.patch added to -mm tree

+ arm64-mm-hugetlb-enable-hugetlb_page_free_vmemmap-for-arm64-fix.patch added to -mm tree

[Andrew Morton]

The patch titled
     Subject: arm64: mm: hugetlb: restructure the code comment inside flush_dcache_page()
has been added to the -mm tree.  Its filename is
     arm64-mm-hugetlb-enable-hugetlb_page_free_vmemmap-for-arm64-fix.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/arm64-mm-hugetlb-enable-hugetlb_page_free_vmemmap-for-arm64-fix.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/arm64-mm-hugetlb-enable-hugetlb_page_free_vmemmap-for-arm64-fix.patch

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------------------------------------------------------
From: Muchun Song <songmuchun@bytedance.com>
Subject: arm64: mm: hugetlb: restructure the code comment inside flush_dcache_page()

Restructure the code comment inside flush_dcache_page() to make it more
clear.

Link: https://lkml.kernel.org/r/20220414072646.21910-1-songmuchun@bytedance.com
Signed-off-by: Muchun Song <songmuchun@bytedance.com>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---


--- a/arch/arm64/mm/flush.c~arm64-mm-hugetlb-enable-hugetlb_page_free_vmemmap-for-arm64-fix
+++ a/arch/arm64/mm/flush.c
@@ -81,9 +81,10 @@ void flush_dcache_page(struct page *page
 	 * read-only when CONFIG_HUGETLB_PAGE_FREE_VMEMMAP is enabled (more
 	 * details can refer to vmemmap_remap_pte()).  Although
 	 * __sync_icache_dcache() only set PG_dcache_clean flag on the head
-	 * page struct, some tail page structs still can be seen the flag is
-	 * set since the head vmemmap page frame is reused (more details can
-	 * refer to the comments above page_fixed_fake_head()).
+	 * page struct, there is more than one page struct with PG_dcache_clean
+	 * associated with the HugeTLB page since the head vmemmap page frame
+	 * is reused (more details can refer to the comments above
+	 * page_fixed_fake_head()).
 	 */
 	if (hugetlb_free_vmemmap_enabled() && PageHuge(page))
 		page = compound_head(page);
_

Patches currently in -mm which might be from songmuchun@bytedance.com are

mm-hugetlb_vmemmap-introduce-arch_want_hugetlb_page_free_vmemmap.patch
arm64-mm-hugetlb-enable-hugetlb_page_free_vmemmap-for-arm64.patch
arm64-mm-hugetlb-enable-hugetlb_page_free_vmemmap-for-arm64-fix.patch
mm-hugetlb_vmemmap-cleanup-hugetlb_vmemmap-related-functions.patch
mm-hugetlb_vmemmap-cleanup-hugetlb_free_vmemmap_enabled.patch
mm-hugetlb_vmemmap-cleanup-config_hugetlb_page_free_vmemmap.patch
mm-rmap-fix-cache-flush-on-thp-pages.patch
dax-fix-cache-flush-on-pmd-mapped-pages.patch
mm-rmap-introduce-pfn_mkclean_range-to-cleans-ptes.patch
mm-pvmw-add-support-for-walking-devmap-pages.patch
dax-fix-missing-writeprotect-the-pte-entry.patch
mm-simplify-follow_invalidate_pte.patch