[merged mm-stable] mm-madvise-use-walk_page_range_vma-instead-of-walk_page_range.patch removed from -mm tree

[merged mm-stable] mm-madvise-use-walk_page_range_vma-instead-of-walk_page_range.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: mm: madvise: use walk_page_range_vma() instead of walk_page_range()
has been removed from the -mm tree.  Its filename was
     mm-madvise-use-walk_page_range_vma-instead-of-walk_page_range.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: Barry Song <v-songbaohua@oppo.com>
Subject: mm: madvise: use walk_page_range_vma() instead of walk_page_range()
Date: Thu, 5 Jun 2025 20:31:44 +1200

We've already found the VMA within madvise_walk_vmas() before calling
specific madvise behavior functions like madvise_free_single_vma().  So
calling walk_page_range() and doing find_vma() again seems unnecessary. 
It also prevents potential optimizations in those madvise callbacks,
particularly the use of dedicated per-VMA locking.

[v-songbaohua@oppo.com: revert the walk_page_range_vma change for MADV_GUARD_INSTALL]
  Link: https://lkml.kernel.org/r/20250609105513.10901-1-21cnbao@gmail.com
Link: https://lkml.kernel.org/r/20250605083144.43046-1-21cnbao@gmail.com
Signed-off-by: Barry Song <v-songbaohua@oppo.com>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Acked-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Oscar Salvador <osalvador@suse.de>
Reviewed-by: Harry Yoo <harry.yoo@oracle.com>
Reviewed-by: Dev Jain <dev.jain@arm.com>
Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
Reviewed-by: Ryan Roberts <ryan.roberts@arm.com>
Tested-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: "Liam R. Howlett" <Liam.Howlett@oracle.com>
Cc: Jann Horn <jannh@google.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Lokesh Gidra <lokeshgidra@google.com>
Cc: Tangquan Zheng <zhengtangquan@oppo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/madvise.c |   10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

--- a/mm/madvise.c~mm-madvise-use-walk_page_range_vma-instead-of-walk_page_range
+++ a/mm/madvise.c
@@ -282,7 +282,7 @@ static long madvise_willneed(struct vm_a
 	*prev = vma;
 #ifdef CONFIG_SWAP
 	if (!file) {
-		walk_page_range(vma->vm_mm, start, end, &swapin_walk_ops, vma);
+		walk_page_range_vma(vma, start, end, &swapin_walk_ops, vma);
 		lru_add_drain(); /* Push any new pages onto the LRU now */
 		return 0;
 	}
@@ -582,7 +582,7 @@ static void madvise_cold_page_range(stru
 	};
 
 	tlb_start_vma(tlb, vma);
-	walk_page_range(vma->vm_mm, addr, end, &cold_walk_ops, &walk_private);
+	walk_page_range_vma(vma, addr, end, &cold_walk_ops, &walk_private);
 	tlb_end_vma(tlb, vma);
 }
 
@@ -620,7 +620,7 @@ static void madvise_pageout_page_range(s
 	};
 
 	tlb_start_vma(tlb, vma);
-	walk_page_range(vma->vm_mm, addr, end, &cold_walk_ops, &walk_private);
+	walk_page_range_vma(vma, addr, end, &cold_walk_ops, &walk_private);
 	tlb_end_vma(tlb, vma);
 }
 
@@ -827,7 +827,7 @@ static int madvise_free_single_vma(struc
 
 	mmu_notifier_invalidate_range_start(&range);
 	tlb_start_vma(tlb, vma);
-	walk_page_range(vma->vm_mm, range.start, range.end,
+	walk_page_range_vma(vma, range.start, range.end,
 			&madvise_free_walk_ops, tlb);
 	tlb_end_vma(tlb, vma);
 	mmu_notifier_invalidate_range_end(&range);
@@ -1246,7 +1246,7 @@ static long madvise_guard_remove(struct
 	if (!is_valid_guard_vma(vma, /* allow_locked = */true))
 		return -EINVAL;
 
-	return walk_page_range(vma->vm_mm, start, end,
+	return walk_page_range_vma(vma, start, end,
 			       &guard_remove_walk_ops, NULL);
 }
 
_

Patches currently in -mm which might be from v-songbaohua@oppo.com are