diff mbox series

[24/28] mmap: Use find_vma_intersection in do_mmap() for overlap

Message ID 20201210170402.3468568-25-Liam.Howlett@Oracle.com (mailing list archive)
State New, archived
Headers show
Series RFC mm: Introducing the Maple Tree | expand

Commit Message

Liam R. Howlett Dec. 10, 2020, 5:03 p.m. UTC 
When detecting a conflict with MAP_FIXED_NOREPLACE, using the new interface avoids
the need for a temp variable

Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
---
 mm/mmap.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/mm/mmap.c b/mm/mmap.c
index 4ef32ed2c34dc..48ab40a90428b 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1433,9 +1433,7 @@  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;
 	}