linux-kernel - [PATCH 5/5] f2fs: move the list_head initialization into the lock protection region

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Date:	Tue, 19 Nov 2013 18:03:47 +0800
From:	Gu Zheng <guz.fnst@...fujitsu.com>
To:	Kim <jaegeuk.kim@...sung.com>
CC:	f2fs <linux-f2fs-devel@...ts.sourceforge.net>,
	fsdevel <linux-fsdevel@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: [PATCH 5/5] f2fs: move the list_head initialization into the lock
 protection region


Signed-off-by: Gu Zheng <guz.fnst@...fujitsu.com>
---
 fs/f2fs/checkpoint.c |   15 ++++++++++-----
 1 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index f884589..1de70cc 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -511,8 +511,8 @@ void add_dirty_dir_inode(struct inode *inode)
 void remove_dirty_dir_inode(struct inode *inode)
 {
 	struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
-	struct list_head *head = &sbi->dir_inode_list;
-	struct list_head *this;
+
+	struct list_head *this, *head;
 
 	if (!S_ISDIR(inode->i_mode))
 		return;
@@ -523,6 +523,7 @@ void remove_dirty_dir_inode(struct inode *inode)
 		return;
 	}
 
+	head = &sbi->dir_inode_list;
 	list_for_each(this, head) {
 		struct dir_inode_entry *entry;
 		entry = list_entry(this, struct dir_inode_entry, list);
@@ -544,11 +545,13 @@ void remove_dirty_dir_inode(struct inode *inode)
 
 struct inode *check_dirty_dir_inode(struct f2fs_sb_info *sbi, nid_t ino)
 {
-	struct list_head *head = &sbi->dir_inode_list;
-	struct list_head *this;
+
+	struct list_head *this, *head;
 	struct inode *inode = NULL;
 
 	spin_lock(&sbi->dir_inode_lock);
+
+	head = &sbi->dir_inode_list;
 	list_for_each(this, head) {
 		struct dir_inode_entry *entry;
 		entry = list_entry(this, struct dir_inode_entry, list);
@@ -563,11 +566,13 @@ struct inode *check_dirty_dir_inode(struct f2fs_sb_info *sbi, nid_t ino)
 
 void sync_dirty_dir_inodes(struct f2fs_sb_info *sbi)
 {
-	struct list_head *head = &sbi->dir_inode_list;
+	struct list_head *head;
 	struct dir_inode_entry *entry;
 	struct inode *inode;
 retry:
 	spin_lock(&sbi->dir_inode_lock);
+
+	head = &sbi->dir_inode_list;
 	if (list_empty(head)) {
 		spin_unlock(&sbi->dir_inode_lock);
 		return;
-- 
1.7.7

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