Merge tag 'driver-core-3.13-rc2' of...

	struct sysfs_dirent *attr_sd = file->f_path.dentry->d_fsdata;

	struct kobject *kobj = attr_sd->s_parent->s_dir.kobj;

	struct sysfs_open_file *of;

	bool has_read, has_write;

	bool has_read, has_write, has_mmap;

	int error = -EACCES;

	/* need attr_sd for attr and ops, its parent for kobj */

		has_read = battr->read || battr->mmap;

		has_write = battr->write || battr->mmap;

		has_mmap = battr->mmap;

	} else {

		const struct sysfs_ops *ops = sysfs_file_ops(attr_sd);

		has_read = ops->show;

		has_write = ops->store;

		has_mmap = false;

	}

	/* check perms and supported operations */

	if (!of)

		goto err_out;

	/*

	 * The following is done to give a different lockdep key to

	 * @of->mutex for files which implement mmap.  This is a rather

	 * crude way to avoid false positive lockdep warning around

	 * mm->mmap_sem - mmap nests @of->mutex under mm->mmap_sem and

	 * reading /sys/block/sda/trace/act_mask grabs sr_mutex, under

	 * which mm->mmap_sem nests, while holding @of->mutex.  As each

	 * open file has a separate mutex, it's okay as long as those don't

	 * happen on the same file.  At this point, we can't easily give

	 * each file a separate locking class.  Let's differentiate on

	 * whether the file has mmap or not for now.

	 */

	if (has_mmap)

		mutex_init(&of->mutex);

	else

		mutex_init(&of->mutex);

	of->sd = attr_sd;

	of->file = file;