Hi,
This patch kills the pointless debugfs rmdir() printk() when called on a
non-empty directory. blktrace will sometimes have to call it a few times
when forcefully ending a trace, which polutes the log with pointless
warnings.
Rationale:
- It's more code to work-around this "problem" in the debugfs users, and
  you would have to add code to check for empty directories to do so (or
  assume that debugfs is using simple_ helpers, but that would be a
  layering violation).
- Other rmdir() implementations don't complain about something this
  silly.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
                        switch (dentry->d_inode->i_mode & S_IFMT) {
                        case S_IFDIR:
                                ret = simple_rmdir(parent->d_inode, dentry);
-                               if (ret)
-                                       printk(KERN_ERR
-                                               "DebugFS rmdir on %s failed : "
-                                               "directory not empty.\n",
-                                               dentry->d_name.name);
                                break;
                        case S_IFLNK:
                                kfree(dentry->d_inode->i_private);