[PATCH] btrfs:make close_ctree() return void

[Wanlong Gao]

From: Wanlong Gao <gaowanl...@cn.fujitsu.com>

Make close_ctree() return void since it always return 0, and fix
the return value of btrfs_put_super() to consistent with VFS.

Signed-off-by: Wanlong Gao <gaowanl...@cn.fujitsu.com>
---
 fs/btrfs/disk-io.c |    4 +---
 fs/btrfs/disk-io.h |    2 +-
 fs/btrfs/super.c   |    5 +----
 3 files changed, 3 insertions(+), 8 deletions(-)

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 07b3ac6..b2c15d4 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -2528,7 +2528,7 @@ int btrfs_commit_super(struct btrfs_root *root)
        return ret;
 }
 
-int close_ctree(struct btrfs_root *root)
+void close_ctree(struct btrfs_root *root)
 {
        struct btrfs_fs_info *fs_info = root->fs_info;
        int ret;
@@ -2630,8 +2630,6 @@ int close_ctree(struct btrfs_root *root)
        kfree(fs_info->dev_root);
        kfree(fs_info->csum_root);
        kfree(fs_info);
-
-       return 0;
 }
 
 int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid)
diff --git a/fs/btrfs/disk-io.h b/fs/btrfs/disk-io.h
index bec3ea4..4a191b2 100644
--- a/fs/btrfs/disk-io.h
+++ b/fs/btrfs/disk-io.h
@@ -47,7 +47,7 @@ int clean_tree_block(struct btrfs_trans_handle *trans,
 struct btrfs_root *open_ctree(struct super_block *sb,
                              struct btrfs_fs_devices *fs_devices,
                              char *options);
-int close_ctree(struct btrfs_root *root);
+void close_ctree(struct btrfs_root *root);
 int write_ctree_super(struct btrfs_trans_handle *trans,
                      struct btrfs_root *root, int max_mirrors);
 struct buffer_head *btrfs_read_dev_super(struct block_device *bdev);
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 31e9654..e1d8d32 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -146,12 +146,9 @@ void __btrfs_std_error(struct btrfs_fs_info *fs_info, 
const char *function,
 static void btrfs_put_super(struct super_block *sb)
 {
        struct btrfs_root *root = btrfs_sb(sb);
-       int ret;
 
-       ret = close_ctree(root);
+       close_ctree(root);
        sb->s_fs_info = NULL;
-
-       (void)ret; /* FIXME: need to fix VFS to return error? */
 }
 
 enum {
-- 
1.7.4.1

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