+ mm-mmap-use-find_vma_intersection-in-do_mmap-for-overlap.patch added to -mm tree

+ mm-mmap-use-find_vma_intersection-in-do_mmap-for-overlap.patch added to -mm tree

[akpm]

The patch titled
     Subject: mm/mmap: use find_vma_intersection() in do_mmap() for overlap
has been added to the -mm tree.  Its filename is
     mm-mmap-use-find_vma_intersection-in-do_mmap-for-overlap.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/mm-mmap-use-find_vma_intersection-in-do_mmap-for-overlap.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/mm-mmap-use-find_vma_intersection-in-do_mmap-for-overlap.patch

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------------------------------------------------------
From: Liam Howlett <liam.howlett@oracle.com>
Subject: mm/mmap: use find_vma_intersection() in do_mmap() for overlap

Using find_vma_intersection() avoids the need for a temporary variable and
makes the code cleaner.

Link: https://lkml.kernel.org/r/20210511014328.2902782-1-Liam.Howlett@Oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/mmap.c |    4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

--- a/mm/mmap.c~mm-mmap-use-find_vma_intersection-in-do_mmap-for-overlap
+++ a/mm/mmap.c
@@ -1457,9 +1457,7 @@ unsigned long do_mmap(struct file *file,
 		return addr;
 
 	if (flags & MAP_FIXED_NOREPLACE) {
-		struct vm_area_struct *vma = find_vma(mm, addr);
-
-		if (vma && vma->vm_start < addr + len)
+		if (find_vma_intersection(mm, addr, addr + len))
 			return -EEXIST;
 	}
 
_

Patches currently in -mm which might be from liam.howlett@oracle.com are

mm-mmap-introduce-unlock_range-for-code-cleanup.patch
mm-mmap-use-find_vma_intersection-in-do_mmap-for-overlap.patch