[PATCH] mm/mmap.c: Remove redundant vma looping

[Chen Gang]

>From 36dbcc145819655682f80efd49e72b01515b4e9a Mon Sep 17 00:00:00 2001
From: Chen Gang <gang.chen.5i5j@xxxxxxxxx>
Date: Sun, 4 Oct 2015 03:22:41 +0800
Subject: [PATCH] mm/mmap.c: Remove redundant vma looping

vma->vm_file->f_mapping and vma->anon_vma are shared with the same vma
looping, so merge them.

Signed-off-by: Chen Gang <gang.chen.5i5j@xxxxxxxxx>
---
 mm/mmap.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/mm/mmap.c b/mm/mmap.c
index 8393580..f7c1631 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -3201,9 +3201,7 @@ int mm_take_all_locks(struct mm_struct *mm)
 			goto out_unlock;
 		if (vma->vm_file && vma->vm_file->f_mapping)
 			vm_lock_mapping(mm, vma->vm_file->f_mapping);
-	}
 
-	for (vma = mm->mmap; vma; vma = vma->vm_next) {
 		if (signal_pending(current))
 			goto out_unlock;
 		if (vma->anon_vma)
-- 
1.9.3


Chen Gang

Open, share, and attitude like air, water, and life which God blessed

Attachment: 0001-mm-mmap.c-Remove-redundant-vma-looping.patch
Description: Binary data