drm: cdev lock_kernel() pushdown

#include "drmP.h"

#include "drm_sarea.h"

#include <linux/poll.h>

#include <linux/smp_lock.h>

static int drm_open_helper(struct inode *inode, struct file *filp,

			   struct drm_device * dev);

	DRM_DEBUG("\n");

	/* BKL pushdown: note that nothing else serializes idr_find() */

	lock_kernel();

	minor = idr_find(&drm_minors_idr, minor_id);

	if (!minor)

		return -ENODEV;

		goto out;

	if (!(dev = minor->dev))

		return -ENODEV;

		goto out;

	old_fops = filp->f_op;

	filp->f_op = fops_get(&dev->driver->fops);

	}

	fops_put(old_fops);

out:

	unlock_kernel();

	return err;

}