linux-kernel - [PATCH] btrfs: using btrfs_stack_device

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Date:	Wed, 06 Jan 2010 19:48:18 +0800
From:	Xiao Guangrong <xiaoguangrong@...fujitsu.com>
To:	Chris Mason <chris.mason@...cle.com>
CC:	Yan Zheng <zheng.yan@...cle.com>, Julia Lawall <julia@...u.dk>,
	Josef Bacik <josef@...hat.com>, linux-btrfs@...r.kernel.org,
	LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH] btrfs: using btrfs_stack_device_id() get devid

We can use btrfs_stack_device_id() to get dev_item->devid

Signed-off-by: Xiao Guangrong <xiaoguangrong@...fujitsu.com>
---
 fs/btrfs/volumes.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 198cff2..3b8b2b9 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -592,7 +592,7 @@ static int __btrfs_open_devices(struct btrfs_fs_devices *fs_devices,
 			goto error_close;
 
 		disk_super = (struct btrfs_super_block *)bh->b_data;
-		devid = le64_to_cpu(disk_super->dev_item.devid);
+		devid = btrfs_stack_device_id(&disk_super->dev_item);
 		if (devid != device->devid)
 			goto error_brelse;
 
@@ -694,7 +694,7 @@ int btrfs_scan_one_device(const char *path, fmode_t flags, void *holder,
 		goto error_close;
 	}
 	disk_super = (struct btrfs_super_block *)bh->b_data;
-	devid = le64_to_cpu(disk_super->dev_item.devid);
+	devid = btrfs_stack_device_id(&disk_super->dev_item);
 	transid = btrfs_super_generation(disk_super);
 	if (disk_super->label[0])
 		printk(KERN_INFO "device label %s ", disk_super->label);
@@ -1187,7 +1187,7 @@ int btrfs_rm_device(struct btrfs_root *root, char *device_path)
 			goto error_close;
 		}
 		disk_super = (struct btrfs_super_block *)bh->b_data;
-		devid = le64_to_cpu(disk_super->dev_item.devid);
+		devid = btrfs_stack_device_id(&disk_super->dev_item);
 		dev_uuid = disk_super->dev_item.uuid;
 		device = btrfs_find_device(root, devid, dev_uuid,
 					   disk_super->fsid);
-- 
1.6.1.2

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