[merged mm-stable] hugetlb-add-comment-for-subtle-sethpagevmemmapoptimized.patch removed from -mm tree

[merged mm-stable] hugetlb-add-comment-for-subtle-sethpagevmemmapoptimized.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: hugetlb: add comment for subtle SetHPageVmemmapOptimized()
has been removed from the -mm tree.  Its filename was
     hugetlb-add-comment-for-subtle-sethpagevmemmapoptimized.patch

This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: Miaohe Lin <linmiaohe@huawei.com>
Subject: hugetlb: add comment for subtle SetHPageVmemmapOptimized()
Date: Thu, 1 Sep 2022 20:00:28 +0800

The SetHPageVmemmapOptimized() called here seems unnecessary as it's
assumed to be set when calling this function. But it's indeed cleared
by above set_page_private(page, 0). Add a comment to avoid possible
future confusion.

Link: https://lkml.kernel.org/r/20220901120030.63318-9-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: Muchun Song <songmuchun@bytedance.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/hugetlb.c |    4 ++++
 1 file changed, 4 insertions(+)

--- a/mm/hugetlb.c~hugetlb-add-comment-for-subtle-sethpagevmemmapoptimized
+++ a/mm/hugetlb.c
@@ -1504,6 +1504,10 @@ static void add_hugetlb_page(struct hsta
 
 	set_compound_page_dtor(page, HUGETLB_PAGE_DTOR);
 	set_page_private(page, 0);
+	/*
+	 * We have to set HPageVmemmapOptimized again as above
+	 * set_page_private(page, 0) cleared it.
+	 */
 	SetHPageVmemmapOptimized(page);
 
 	/*
_

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

mm-hwpoison-use-clearpagehwpoison-in-memory_failure.patch
mm-hwpoison-use-__pagemovable-to-detect-non-lru-movable-pages.patch
mm-hwpoison-use-num_poisoned_pages_sub-to-decrease-num_poisoned_pages.patch
mm-hwpoison-avoid-unneeded-page_mapped_in_vma-overhead-in-collect_procs_anon.patch
mm-hwpoison-check-pagetable-explicitly-in-hwpoison_user_mappings.patch
mm-hwpoison-cleanup-some-obsolete-comments.patch
writeback-remove-unused-macro-dirty_full_scope.patch