[to-be-updated] mm-hugetlb-use-direct-assignment-instead-of-folio_change_private.patch removed from -mm tree

[to-be-updated] mm-hugetlb-use-direct-assignment-instead-of-folio_change_private.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: mm/hugetlb: use direct assignment instead of folio_change_private()
has been removed from the -mm tree.  Its filename was
     mm-hugetlb-use-direct-assignment-instead-of-folio_change_private.patch

This patch was dropped because an updated version will be issued

------------------------------------------------------
From: Zi Yan <ziy@nvidia.com>
Subject: mm/hugetlb: use direct assignment instead of folio_change_private()
Date: Sun, 13 Sep 2026 22:24:03 -0400

folio_change_private() should be used along with folio_attach_private()
and folio_detach_private(), where adding and remove ->private content
requires folio refcount change.  add_hugetlb_folio() simply sets
folio->private to NULL without refcount manipulation.  Change it to direct
assignment to avoid semantic confusion.

It prepares for a future commit that removes PG_private.

No functional change intended.

Assisted-by: LLM
Link: https://lore.kernel.org/20260913-remove-pg_private-v4-5-848550f7574e@nvidia.com
Signed-off-by: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Usama Arif <usama.arif@linux.dev>
Reviewed-by: Gregory Price (Meta) <gourry@gourry.net>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Oscar Salvador <osalvador@suse.de>
---

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

--- a/mm/hugetlb.c~mm-hugetlb-use-direct-assignment-instead-of-folio_change_private
+++ a/mm/hugetlb.c
@@ -1446,11 +1446,8 @@ void add_hugetlb_folio(struct hstate *h,
 	}
 
 	__folio_set_hugetlb(folio);
-	folio_change_private(folio, NULL);
-	/*
-	 * We have to set hugetlb_vmemmap_optimized again as above
-	 * folio_change_private(folio, NULL) cleared it.
-	 */
+	/* Clear all folio->private flags except hugetlb_vmemmap_optimized. */
+	folio->private = NULL;
 	folio_set_hugetlb_vmemmap_optimized(folio);
 
 	arch_clear_hugetlb_flags(folio);
_

Patches currently in -mm which might be from ziy@nvidia.com are

f2fs-stop-using-pg_private.patch
f2fs-convert-the-private-flag-helpers-to-folio-only.patch
erofs-mm-pagemap-add-readahead_folio_last-to-avoid-folio-private.patch
erofs-use-folio_attach-detach_private-instead-of-direct-assignment.patch
mm-page-flags-check-page-folio-private-instead-of-pg_private.patch
treewide-remove-folio_set-clear_private-usage.patch
ceph-replace-pageprivate-with-page_private.patch
md-md-bitmap-replace-pageprivate-with-page_private.patch
buffer-replace-page_buffer-with-page_private-and-delete-it.patch
treewide-remove-pageprivate-and-pg_private-from-comments-and-docs.patch
mm-page-flags-remove-pg_private.patch
usb-gadgetfs-do-not-warn-about-excessively-large-memory-allocations.patch