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@xxxxxxxxxx>
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@xxxxxxxxxx
Signed-off-by: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx>
Reviewed-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
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@xxxxxxxxxx are
mm-mmap-introduce-unlock_range-for-code-cleanup.patch
mm-mmap-use-find_vma_intersection-in-do_mmap-for-overlap.patch
