drm: Kill file_priv->ioctl_count tracking

It's racy, and it's only used in debugfs. There are simpler ways to
know whether something is going on (like looking at dmesg with full
debugging enabled). And they're all much more useful.

So let's just rip this out.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/drm_drv.c

@@ -315,8 +315,6 @@ long drm_ioctl(struct file *filp,
 	if (drm_device_is_unplugged(dev))
 		return -ENODEV;
 
-	++file_priv->ioctl_count;
-
 	if ((nr >= DRM_CORE_IOCTL_COUNT) &&
 	    ((nr < DRM_COMMAND_BASE) || (nr >= DRM_COMMAND_END)))
 		goto err_i1;

drivers/gpu/drm/drm_fops.c

@@ -232,7 +232,6 @@ static int drm_open_helper(struct inode *inode, struct file *filp,
 		goto out_put_pid;
 	}
 
-	priv->ioctl_count = 0;
 	/* for compatibility root is always authenticated */
 	priv->always_authenticated = capable(CAP_SYS_ADMIN);
 	priv->authenticated = priv->always_authenticated;

drivers/gpu/drm/drm_info.c

@@ -186,14 +186,14 @@ int drm_clients_info(struct seq_file *m, void *data)
 	struct drm_file *priv;
 
 	mutex_lock(&dev->struct_mutex);
-	seq_printf(m, "a dev	pid    uid	magic	  ioctls\n\n");
+	seq_printf(m, "a dev	pid    uid	magic\n\n");
 	list_for_each_entry(priv, &dev->filelist, lhead) {
-		seq_printf(m, "%c %3d %5d %5d %10u %10lu\n",
+		seq_printf(m, "%c %3d %5d %5d %10u\n",
 			   priv->authenticated ? 'y' : 'n',
 			   priv->minor->index,
 			   pid_vnr(priv->pid),
 			   from_kuid_munged(seq_user_ns(m), priv->uid),
-			   priv->magic, priv->ioctl_count);
+			   priv->magic);
 	}
 	mutex_unlock(&dev->struct_mutex);
 	return 0;

include/drm/drmP.h

@@ -438,7 +438,6 @@ struct drm_file {
 	struct pid *pid;
 	kuid_t uid;
 	drm_magic_t magic;
-	unsigned long ioctl_count;
 	struct list_head lhead;
 	struct drm_minor *minor;
 	unsigned long lock_count;