btrfs: add helper for fs_info->closing

wrap checking of filesystem 'closing' flag and fix a few missing memory
barriers.

Signed-off-by: David Sterba <dsterba@suse.cz>

1 files changed, 2 insertions, 2 deletions

diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 982b5ea9762f..fa4ef18b66b1 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -129,7 +129,7 @@ int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
         if (!btrfs_test_opt(root, AUTO_DEFRAG))
                 return 0;
 
-        if (root->fs_info->closing)
+        if (btrfs_fs_closing(root->fs_info))
                 return 0;
 
         if (BTRFS_I(inode)->in_defrag)
@@ -229,7 +229,7 @@ int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info)
                 first_ino = defrag->ino + 1;
                 rb_erase(&defrag->rb_node, &fs_info->defrag_inodes);
 
-                if (fs_info->closing)
+                if (btrfs_fs_closing(fs_info))
                         goto next_free;
 
                 spin_unlock(&fs_info->defrag_inodes_lock);