+ remap_file_pages-use-vma_lookup-instead-of-find_vma.patch added to -mm tree

+ remap_file_pages-use-vma_lookup-instead-of-find_vma.patch added to -mm tree

[akpm]

The patch titled
     Subject: remap_file_pages: Use vma_lookup() instead of find_vma()
has been added to the -mm tree.  Its filename is
     remap_file_pages-use-vma_lookup-instead-of-find_vma.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/remap_file_pages-use-vma_lookup-instead-of-find_vma.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/remap_file_pages-use-vma_lookup-instead-of-find_vma.patch

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------------------------------------------------------
From: "Liam R. Howlett" <Liam.Howlett@Oracle.com>
Subject: remap_file_pages: Use vma_lookup() instead of find_vma()

Using vma_lookup() verifies the start address is contained in the found vma.
This results in easier to read code.

Link: https://lkml.kernel.org/r/20210817135234.1550204-1-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/mmap.c |    5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

--- a/mm/mmap.c~remap_file_pages-use-vma_lookup-instead-of-find_vma
+++ a/mm/mmap.c
@@ -2994,14 +2994,11 @@ SYSCALL_DEFINE5(remap_file_pages, unsign
 	if (mmap_write_lock_killable(mm))
 		return -EINTR;
 
-	vma = find_vma(mm, start);
+	vma = vma_lookup(mm, start);
 
 	if (!vma || !(vma->vm_flags & VM_SHARED))
 		goto out;
 
-	if (start < vma->vm_start)
-		goto out;
-
 	if (start + size > vma->vm_end) {
 		struct vm_area_struct *next;
 
_

Patches currently in -mm which might be from Liam.Howlett@Oracle.com are

remap_file_pages-use-vma_lookup-instead-of-find_vma.patch