Convert simple loops over superblocks to list_for_each_entry_safe

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/buffer.c

@@ -562,12 +562,11 @@ static int osync_buffers_list(spinlock_t *lock, struct list_head *list)
 
 static void do_thaw_all(struct work_struct *work)
 {
-	struct super_block *sb;
+	struct super_block *sb, *n;
 	char b[BDEVNAME_SIZE];
 
 	spin_lock(&sb_lock);
-restart:
-	list_for_each_entry(sb, &super_blocks, s_list) {
+	list_for_each_entry_safe(sb, n, &super_blocks, s_list) {
 		if (list_empty(&sb->s_instances))
 			continue;
 		sb->s_count++;
@@ -578,8 +577,6 @@ static void do_thaw_all(struct work_struct *work)
 			       bdevname(sb->s_bdev, b));
 		up_read(&sb->s_umount);
 		spin_lock(&sb_lock);
-		if (__put_super_and_need_restart(sb))
-			goto restart;
 	}
 	spin_unlock(&sb_lock);
 	kfree(work);

fs/drop_caches.c

@@ -35,11 +35,10 @@ static void drop_pagecache_sb(struct super_block *sb)
 
 static void drop_pagecache(void)
 {
-	struct super_block *sb;
+	struct super_block *sb, *n;
 
 	spin_lock(&sb_lock);
-restart:
-	list_for_each_entry(sb, &super_blocks, s_list) {
+	list_for_each_entry_safe(sb, n, &super_blocks, s_list) {
 		if (list_empty(&sb->s_instances))
 			continue;
 		sb->s_count++;
@@ -49,8 +48,7 @@ static void drop_pagecache(void)
 			drop_pagecache_sb(sb);
 		up_read(&sb->s_umount);
 		spin_lock(&sb_lock);
-		if (__put_super_and_need_restart(sb))
-			goto restart;
+		__put_super(sb);
 	}
 	spin_unlock(&sb_lock);
 }

fs/quota/quota.c

@@ -47,7 +47,7 @@ static int check_quotactl_permission(struct super_block *sb, int type, int cmd,
 
 static int quota_sync_all(int type)
 {
-	struct super_block *sb;
+	struct super_block *sb, *n;
 	int ret;
 
 	if (type >= MAXQUOTAS)
@@ -57,8 +57,7 @@ static int quota_sync_all(int type)
 		return ret;
 
 	spin_lock(&sb_lock);
-restart:
-	list_for_each_entry(sb, &super_blocks, s_list) {
+	list_for_each_entry_safe(sb, n, &super_blocks, s_list) {
 		if (list_empty(&sb->s_instances))
 			continue;
 		if (!sb->s_qcop || !sb->s_qcop->quota_sync)
@@ -71,8 +70,7 @@ static int quota_sync_all(int type)
 			sb->s_qcop->quota_sync(sb, type, 1);
 		up_read(&sb->s_umount);
 		spin_lock(&sb_lock);
-		if (__put_super_and_need_restart(sb))
-			goto restart;
+		__put_super(sb);
 	}
 	spin_unlock(&sb_lock);
 

fs/super.c

@@ -395,11 +395,10 @@ EXPORT_SYMBOL(drop_super);
  */
 void sync_supers(void)
 {
-	struct super_block *sb;
+	struct super_block *sb, *n;
 
 	spin_lock(&sb_lock);
-restart:
-	list_for_each_entry(sb, &super_blocks, s_list) {
+	list_for_each_entry_safe(sb, n, &super_blocks, s_list) {
 		if (list_empty(&sb->s_instances))
 			continue;
 		if (sb->s_op->write_super && sb->s_dirt) {
@@ -412,8 +411,7 @@ void sync_supers(void)
 			up_read(&sb->s_umount);
 
 			spin_lock(&sb_lock);
-			if (__put_super_and_need_restart(sb))
-				goto restart;
+			__put_super(sb);
 		}
 	}
 	spin_unlock(&sb_lock);