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| author |   Liam Howlett <liam.howlett@oracle.com> | 2021-06-28 19:38:44 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2021-06-29 10:53:51 -0700 |
| commit | 35e43c5ff4d2da700e8ed2216acae81f62800eaa (patch) | |
| tree | fbbee22661dbbc52ecdc5ba84cf508f8130a6377 | |
| parent | mm/mmap: introduce unlock_range() for code cleanup (diff) | |
| download | linux-dev-35e43c5ff4d2da700e8ed2216acae81f62800eaa.tar.xz linux-dev-35e43c5ff4d2da700e8ed2216acae81f62800eaa.zip | |
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>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | mm/mmap.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/mm/mmap.c b/mm/mmap.c index d72716f7a0b4..d8c92ae50565 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -1457,9 +1457,7 @@ unsigned long do_mmap(struct file *file, unsigned long addr, 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; } |