linux-kernel - [PATCH] mm/mmap: Use find_vma_intersection() in do

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Date:   Tue, 11 May 2021 01:43:38 +0000
From:   Liam Howlett <liam.howlett@...cle.com>
To:     "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Andrew Morton <akpm@...ux-foundation.org>
CC:     Liam Howlett <liam.howlett@...cle.com>
Subject: [PATCH] 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.

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

diff --git a/mm/mmap.c b/mm/mmap.c
index 1bbb3225c958..016715924529 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1456,9 +1456,7 @@ 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;
 	}
 
-- 
2.30.2