Btrfs: add and improve comments

[linux-2.6-block.git] / fs / btrfs / super.c

diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 8399d6d05d63c6d458f0d9437b89ef9a9a983b9a..2e6039825b7bc19d97f79276b494a4f3fd177d92 100644 (file)
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -519,6 +519,9 @@ static struct file_system_type btrfs_fs_type = {
        .fs_flags       = FS_REQUIRES_DEV,
 };
 
+/*
+ * used by btrfsctl to scan devices when no FS is mounted
+ */
 static long btrfs_control_ioctl(struct file *file, unsigned int cmd,
                                unsigned long arg)
 {