sem2mutex: drivers/char/drm/

From: Arjan van de Ven <[e-mail]>

Semaphore to mutex conversion.

The conversion was generated via scripts, and the result was validated
automatically via a script as well.

Signed-off-by: Arjan van de Ven <[e-mail]>
Signed-off-by: Ingo Molnar <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Dave Airlie <[e-mail]>

drivers/char/drm/drmP.h

···
 #include <linux/smp_lock.h>	/* For (un)lock_kernel */
 #include <linux/mm.h>
 #include <linux/cdev.h>
+#include <linux/mutex.h>
 #if defined(__alpha__) || defined(__powerpc__)
 #include <asm/pgtable.h>	/* For pte_wrprotect */
 #endif
···
 	/** \name Locks */
 	/*@{ */
 	spinlock_t count_lock;		/**< For inuse, drm_device::open_count, drm_device::buf_use */
-	struct semaphore struct_sem;	/**< For others */
+	struct mutex struct_mutex;	/**< For others */
 	/*@} */
 
 	/** \name Usage Counters */
···
 	/*@{ */
 	drm_ctx_list_t *ctxlist;	/**< Linked list of context handles */
 	int ctx_count;			/**< Number of context handles */
-	struct semaphore ctxlist_sem;	/**< For ctxlist */
+	struct mutex ctxlist_mutex;	/**< For ctxlist */
 
 	drm_map_t **context_sareas;	    /**< per-context SAREA's */
 	int max_context;

drivers/char/drm/drm_auth.c

···
  * \param magic magic number.
  *
  * Searches in drm_device::magiclist within all files with the same hash key
- * the one with matching magic number, while holding the drm_device::struct_sem
+ * the one with matching magic number, while holding the drm_device::struct_mutex
  * lock.
  */
 static drm_file_t *drm_find_file(drm_device_t * dev, drm_magic_t magic)
···
 	drm_magic_entry_t *pt;
 	int hash = drm_hash_magic(magic);
 
-	down(&dev->struct_sem);
+	mutex_lock(&dev->struct_mutex);
 	for (pt = dev->magiclist[hash].head; pt; pt = pt->next) {
 		if (pt->magic == magic) {
 			retval = pt->priv;
 			break;
 		}
 	}
-	up(&dev->struct_sem);
+	mutex_unlock(&dev->struct_mutex);
 	return retval;
 }
 
···
  *
  * Creates a drm_magic_entry structure and appends to the linked list
  * associated the magic number hash key in drm_device::magiclist, while holding
- * the drm_device::struct_sem lock.
+ * the drm_device::struct_mutex lock.
  */
 static int drm_add_magic(drm_device_t * dev, drm_file_t * priv,
 			 drm_magic_t magic)
···
 	entry->priv = priv;
 	entry->next = NULL;
 
-	down(&dev->struct_sem);
+	mutex_lock(&dev->struct_mutex);
 	if (dev->magiclist[hash].tail) {
 		dev->magiclist[hash].tail->next = entry;
 		dev->magiclist[hash].tail = entry;
···
 		dev->magiclist[hash].head = entry;
 		dev->magiclist[hash].tail = entry;
 	}
-	up(&dev->struct_sem);
+	mutex_unlock(&dev->struct_mutex);
 
 	return 0;
 }
···
  * \param magic magic number.
  *
  * Searches and unlinks the entry in drm_device::magiclist with the magic
- * number hash key, while holding the drm_device::struct_sem lock.
+ * number hash key, while holding the drm_device::struct_mutex lock.
  */
 static int drm_remove_magic(drm_device_t * dev, drm_magic_t magic)
 {
···
 	DRM_DEBUG("%d\n", magic);
 	hash = drm_hash_magic(magic);
 
-	down(&dev->struct_sem);
+	mutex_lock(&dev->struct_mutex);
 	for (pt = dev->magiclist[hash].head; pt; prev = pt, pt = pt->next) {
 		if (pt->magic == magic) {
 			if (dev->magiclist[hash].head == pt) {
···
 			if (prev) {
 				prev->next = pt->next;
 			}
-			up(&dev->struct_sem);
+			mutex_unlock(&dev->struct_mutex);
 			return 0;
 		}
 	}
-	up(&dev->struct_sem);
+	mutex_unlock(&dev->struct_mutex);
 
 	drm_free(pt, sizeof(*pt), DRM_MEM_MAGIC);
 

drivers/char/drm/drm_bufs.c

···
 	memset(list, 0, sizeof(*list));
 	list->map = map;
 
-	down(&dev->struct_sem);
+	mutex_lock(&dev->struct_mutex);
 	list_add(&list->head, &dev->maplist->head);
 	/* Assign a 32-bit handle */
-	/* We do it here so that dev->struct_sem protects the increment */
+	/* We do it here so that dev->struct_mutex protects the increment */
 	list->user_token = HandleID(map->type == _DRM_SHM
 				    ? (unsigned long)map->handle
 				    : map->offset, dev);
-	up(&dev->struct_sem);
+	mutex_unlock(&dev->struct_mutex);
 
 	*maplist = list;
 	return 0;
···
 {
 	int ret;
 
-	down(&dev->struct_sem);
+	mutex_lock(&dev->struct_mutex);
 	ret = drm_rmmap_locked(dev, map);
-	up(&dev->struct_sem);
+	mutex_unlock(&dev->struct_mutex);
 
 	return ret;
 }
···
 		return -EFAULT;
 	}
 
-	down(&dev->struct_sem);
+	mutex_lock(&dev->struct_mutex);
 	list_for_each(list, &dev->maplist->head) {
 		drm_map_list_t *r_list = list_entry(list, drm_map_list_t, head);
 
···
 	 * find anything.
 	 */
 	if (list == (&dev->maplist->head)) {
-		up(&dev->struct_sem);
+		mutex_unlock(&dev->struct_mutex);
 		return -EINVAL;
 	}
 
···
 
 	/* Register and framebuffer maps are permanent */
 	if ((map->type == _DRM_REGISTERS) || (map->type == _DRM_FRAME_BUFFER)) {
-		up(&dev->struct_sem);
+		mutex_unlock(&dev->struct_mutex);
 		return 0;
 	}
 
 	ret = drm_rmmap_locked(dev, map);
 
-	up(&dev->struct_sem);
+	mutex_unlock(&dev->struct_mutex);
 
 	return ret;
 }
···
 	atomic_inc(&dev->buf_alloc);
 	spin_unlock(&dev->count_lock);
 
-	down(&dev->struct_sem);
+	mutex_lock(&dev->struct_mutex);
 	entry = &dma->bufs[order];
 	if (entry->buf_count) {
-		up(&dev->struct_sem);
+		mutex_unlock(&dev->struct_mutex);
 		atomic_dec(&dev->buf_alloc);
 		return -ENOMEM;	/* May only call once for each order */
 	}
 
 	if (count < 0 || count > 4096) {
-		up(&dev->struct_sem);
+		mutex_unlock(&dev->struct_mutex);
 		atomic_dec(&dev->buf_alloc);
 		return -EINVAL;
 	}
···
 	entry->buflist = drm_alloc(count * sizeof(*entry->buflist),
 				   DRM_MEM_BUFS);
 	if (!entry->buflist) {
-		up(&dev->struct_sem);
+		mutex_unlock(&dev->struct_mutex);
 		atomic_dec(&dev->buf_alloc);
 		return -ENOMEM;
 	}
···
 			/* Set count correctly so we free the proper amount. */
 			entry->buf_count = count;
 			drm_cleanup_buf_error(dev, entry);
-			up(&dev->struct_sem);
+			mutex_unlock(&dev->struct_mutex);
 			atomic_dec(&dev->buf_alloc);
 			return -ENOMEM;
 		}
···
 	if (!temp_buflist) {
 		/* Free the entry because it isn't valid */
 		drm_cleanup_buf_error(dev, entry);
-		up(&dev->struct_sem);
+		mutex_unlock(&dev->struct_mutex);
 		atomic_dec(&dev->buf_alloc);
 		return -ENOMEM;
 	}
···
 	DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count);
 	DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count);
 
-	up(&dev->struct_sem);
+	mutex_unlock(&dev->struct_mutex);
 
 	request->count = entry->buf_count;
 	request->size = size;
···
 	atomic_inc(&dev->buf_alloc);
 	spin_unlock(&dev->count_lock);
 
-	down(&dev->struct_sem);
+	mutex_lock(&dev->struct_mutex);
 	entry = &dma->bufs[order];
 	if (entry->buf_count) {
-		up(&dev->struct_sem);
+		mutex_unlock(&dev->struct_mutex);
 		atomic_dec(&dev->buf_alloc);
 		return -ENOMEM;	/* May only call once for each order */
 	}
 
 	if (count < 0 || count > 4096) {
-		up(&dev->struct_sem);
+		mutex_unlock(&dev->struct_mutex);
 		atomic_dec(&dev->buf_alloc);
 		return -EINVAL;
 	}
···
 	entry->buflist = drm_alloc(count * sizeof(*entry->buflist),
 				   DRM_MEM_BUFS);
 	if (!entry->buflist) {
-		up(&dev->struct_sem);
+		mutex_unlock(&dev->struct_mutex);
 		atomic_dec(&dev->buf_alloc);
 		return -ENOMEM;
 	}
···
 	if (!entry->seglist) {
 		drm_free(entry->buflist,
 			 count * sizeof(*entry->buflist), DRM_MEM_BUFS);
-		up(&dev->struct_sem);
+		mutex_unlock(&dev->struct_mutex);
 		atomic_dec(&dev->buf_alloc);
 		return -ENOMEM;
 	}
···
 			 count * sizeof(*entry->buflist), DRM_MEM_BUFS);
 		drm_free(entry->seglist,
 			 count * sizeof(*entry->seglist), DRM_MEM_SEGS);
-		up(&dev->struct_sem);
+		mutex_unlock(&dev->struct_mutex);
 		atomic_dec(&dev->buf_alloc);
 		return -ENOMEM;
 	}
···
 			drm_free(temp_pagelist,
 				 (dma->page_count + (count << page_order))
 				 * sizeof(*dma->pagelist), DRM_MEM_PAGES);
-			up(&dev->struct_sem);
+			mutex_unlock(&dev->struct_mutex);
 			atomic_dec(&dev->buf_alloc);
 			return -ENOMEM;
 		}
···
 					  (count << page_order))
 					 * sizeof(*dma->pagelist),
 					 DRM_MEM_PAGES);
-				up(&dev->struct_sem);
+				mutex_unlock(&dev->struct_mutex);
 				atomic_dec(&dev->buf_alloc);
 				return -ENOMEM;
 			}
···
 		drm_free(temp_pagelist,
 			 (dma->page_count + (count << page_order))
 			 * sizeof(*dma->pagelist), DRM_MEM_PAGES);
-		up(&dev->struct_sem);
+		mutex_unlock(&dev->struct_mutex);
 		atomic_dec(&dev->buf_alloc);
 		return -ENOMEM;
 	}
···
 	dma->page_count += entry->seg_count << page_order;
 	dma->byte_count += PAGE_SIZE * (entry->seg_count << page_order);
 
-	up(&dev->struct_sem);
+	mutex_unlock(&dev->struct_mutex);
 
 	request->count = entry->buf_count;
 	request->size = size;
···
 	atomic_inc(&dev->buf_alloc);
 	spin_unlock(&dev->count_lock);
 
-	down(&dev->struct_sem);
+	mutex_lock(&dev->struct_mutex);
 	entry = &dma->bufs[order];
 	if (entry->buf_count) {
-		up(&dev->struct_sem);
+		mutex_unlock(&dev->struct_mutex);
 		atomic_dec(&dev->buf_alloc);
 		return -ENOMEM;	/* May only call once for each order */
 	}
 
 	if (count < 0 || count > 4096) {
-		up(&dev->struct_sem);
+		mutex_unlock(&dev->struct_mutex);
 		atomic_dec(&dev->buf_alloc);
 		return -EINVAL;
 	}
···
 	entry->buflist = drm_alloc(count * sizeof(*entry->buflist),
 				   DRM_MEM_BUFS);
 	if (!entry->buflist) {
-		up(&dev->struct_sem);
+		mutex_unlock(&dev->struct_mutex);
 		atomic_dec(&dev->buf_alloc);
 		return -ENOMEM;
 	}
···
 			/* Set count correctly so we free the proper amount. */
 			entry->buf_count = count;
 			drm_cleanup_buf_error(dev, entry);
-			up(&dev->struct_sem);
+			mutex_unlock(&dev->struct_mutex);
 			atomic_dec(&dev->buf_alloc);
 			return -ENOMEM;
 		}
···
 	if (!temp_buflist) {
 		/* Free the entry because it isn't valid */
 		drm_cleanup_buf_error(dev, entry);
-		up(&dev->struct_sem);
+		mutex_unlock(&dev->struct_mutex);
 		atomic_dec(&dev->buf_alloc);
 		return -ENOMEM;
 	}
···
 	DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count);
 	DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count);
 
-	up(&dev->struct_sem);
+	mutex_unlock(&dev->struct_mutex);
 
 	request->count = entry->buf_count;
 	request->size = size;
···
 	atomic_inc(&dev->buf_alloc);
 	spin_unlock(&dev->count_lock);
 
-	down(&dev->struct_sem);
+	mutex_lock(&dev->struct_mutex);
 	entry = &dma->bufs[order];
 	if (entry->buf_count) {
-		up(&dev->struct_sem);
+		mutex_unlock(&dev->struct_mutex);
 		atomic_dec(&dev->buf_alloc);
 		return -ENOMEM;	/* May only call once for each order */
 	}
 
 	if (count < 0 || count > 4096) {
-		up(&dev->struct_sem);
+		mutex_unlock(&dev->struct_mutex);
 		atomic_dec(&dev->buf_alloc);
 		return -EINVAL;
 	}
···
 	entry->buflist = drm_alloc(count * sizeof(*entry->buflist),
 				   DRM_MEM_BUFS);
 	if (!entry->buflist) {
-		up(&dev->struct_sem);
+		mutex_unlock(&dev->struct_mutex);
 		atomic_dec(&dev->buf_alloc);
 		return -ENOMEM;
 	}
···
 			/* Set count correctly so we free the proper amount. */
 			entry->buf_count = count;
 			drm_cleanup_buf_error(dev, entry);
-			up(&dev->struct_sem);
+			mutex_unlock(&dev->struct_mutex);
 			atomic_dec(&dev->buf_alloc);
 			return -ENOMEM;
 		}
···
 	if (!temp_buflist) {
 		/* Free the entry because it isn't valid */
 		drm_cleanup_buf_error(dev, entry);
-		up(&dev->struct_sem);
+		mutex_unlock(&dev->struct_mutex);
 		atomic_dec(&dev->buf_alloc);
 		return -ENOMEM;
 	}
···
 	DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count);
 	DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count);
 
-	up(&dev->struct_sem);
+	mutex_unlock(&dev->struct_mutex);
 
 	request->count = entry->buf_count;
 	request->size = size;

drivers/char/drm/drm_context.c

···
  * \param ctx_handle context handle.
  *
  * Clears the bit specified by \p ctx_handle in drm_device::ctx_bitmap and the entry
- * in drm_device::context_sareas, while holding the drm_device::struct_sem
+ * in drm_device::context_sareas, while holding the drm_device::struct_mutex
  * lock.
  */
 void drm_ctxbitmap_free(drm_device_t * dev, int ctx_handle)
···
 		goto failed;
 
 	if (ctx_handle < DRM_MAX_CTXBITMAP) {
-		down(&dev->struct_sem);
+		mutex_lock(&dev->struct_mutex);
 		clear_bit(ctx_handle, dev->ctx_bitmap);
 		dev->context_sareas[ctx_handle] = NULL;
-		up(&dev->struct_sem);
+		mutex_unlock(&dev->struct_mutex);
 		return;
 	}
       failed:
···
  *
  * Find the first zero bit in drm_device::ctx_bitmap and (re)allocates
  * drm_device::context_sareas to accommodate the new entry while holding the
- * drm_device::struct_sem lock.
+ * drm_device::struct_mutex lock.
  */
 static int drm_ctxbitmap_next(drm_device_t * dev)
 {
···
 	if (!dev->ctx_bitmap)
 		return -1;
 
-	down(&dev->struct_sem);
+	mutex_lock(&dev->struct_mutex);
 	bit = find_first_zero_bit(dev->ctx_bitmap, DRM_MAX_CTXBITMAP);
 	if (bit < DRM_MAX_CTXBITMAP) {
 		set_bit(bit, dev->ctx_bitmap);
···
 							 DRM_MEM_MAPS);
 				if (!ctx_sareas) {
 					clear_bit(bit, dev->ctx_bitmap);
-					up(&dev->struct_sem);
+					mutex_unlock(&dev->struct_mutex);
 					return -1;
 				}
 				dev->context_sareas = ctx_sareas;
···
 					      DRM_MEM_MAPS);
 				if (!dev->context_sareas) {
 					clear_bit(bit, dev->ctx_bitmap);
-					up(&dev->struct_sem);
+					mutex_unlock(&dev->struct_mutex);
 					return -1;
 				}
 				dev->context_sareas[bit] = NULL;
 			}
 		}
-		up(&dev->struct_sem);
+		mutex_unlock(&dev->struct_mutex);
 		return bit;
 	}
-	up(&dev->struct_sem);
+	mutex_unlock(&dev->struct_mutex);
 	return -1;
 }
 
···
  * \param dev DRM device.
  *
  * Allocates and initialize drm_device::ctx_bitmap and drm_device::context_sareas, while holding
- * the drm_device::struct_sem lock.
+ * the drm_device::struct_mutex lock.
  */
 int drm_ctxbitmap_init(drm_device_t * dev)
 {
 	int i;
 	int temp;
 
-	down(&dev->struct_sem);
+	mutex_lock(&dev->struct_mutex);
 	dev->ctx_bitmap = (unsigned long *)drm_alloc(PAGE_SIZE,
 						     DRM_MEM_CTXBITMAP);
 	if (dev->ctx_bitmap == NULL) {
-		up(&dev->struct_sem);
+		mutex_unlock(&dev->struct_mutex);
 		return -ENOMEM;
 	}
 	memset((void *)dev->ctx_bitmap, 0, PAGE_SIZE);
 	dev->context_sareas = NULL;
 	dev->max_context = -1;
-	up(&dev->struct_sem);
+	mutex_unlock(&dev->struct_mutex);
 
 	for (i = 0; i < DRM_RESERVED_CONTEXTS; i++) {
 		temp = drm_ctxbitmap_next(dev);
···
  * \param dev DRM device.
  *
  * Frees drm_device::ctx_bitmap and drm_device::context_sareas, while holding
- * the drm_device::struct_sem lock.
+ * the drm_device::struct_mutex lock.
  */
 void drm_ctxbitmap_cleanup(drm_device_t * dev)
 {
-	down(&dev->struct_sem);
+	mutex_lock(&dev->struct_mutex);
 	if (dev->context_sareas)
 		drm_free(dev->context_sareas,
 			 sizeof(*dev->context_sareas) *
 			 dev->max_context, DRM_MEM_MAPS);
 	drm_free((void *)dev->ctx_bitmap, PAGE_SIZE, DRM_MEM_CTXBITMAP);
-	up(&dev->struct_sem);
+	mutex_unlock(&dev->struct_mutex);
 }
 
 /*@}*/
···
 	if (copy_from_user(&request, argp, sizeof(request)))
 		return -EFAULT;
 
-	down(&dev->struct_sem);
+	mutex_lock(&dev->struct_mutex);
 	if (dev->max_context < 0
 	    || request.ctx_id >= (unsigned)dev->max_context) {
-		up(&dev->struct_sem);
+		mutex_unlock(&dev->struct_mutex);
 		return -EINVAL;
 	}
 
 	map = dev->context_sareas[request.ctx_id];
-	up(&dev->struct_sem);
+	mutex_unlock(&dev->struct_mutex);
 
 	request.handle = NULL;
 	list_for_each_entry(_entry, &dev->maplist->head, head) {
···
 			   (drm_ctx_priv_map_t __user *) arg, sizeof(request)))
 		return -EFAULT;
 
-	down(&dev->struct_sem);
+	mutex_lock(&dev->struct_mutex);
 	list_for_each(list, &dev->maplist->head) {
 		r_list = list_entry(list, drm_map_list_t, head);
 		if (r_list->map
···
 			goto found;
 	}
       bad:
-	up(&dev->struct_sem);
+	mutex_unlock(&dev->struct_mutex);
 	return -EINVAL;
 
       found:
···
 	if (request.ctx_id >= (unsigned)dev->max_context)
 		goto bad;
 	dev->context_sareas[request.ctx_id] = map;
-	up(&dev->struct_sem);
+	mutex_unlock(&dev->struct_mutex);
 	return 0;
 }
 
···
 	ctx_entry->handle = ctx.handle;
 	ctx_entry->tag = priv;
 
-	down(&dev->ctxlist_sem);
+	mutex_lock(&dev->ctxlist_mutex);
 	list_add(&ctx_entry->head, &dev->ctxlist->head);
 	++dev->ctx_count;
-	up(&dev->ctxlist_sem);
+	mutex_unlock(&dev->ctxlist_mutex);
 
 	if (copy_to_user(argp, &ctx, sizeof(ctx)))
 		return -EFAULT;
···
 		drm_ctxbitmap_free(dev, ctx.handle);
 	}
 
-	down(&dev->ctxlist_sem);
+	mutex_lock(&dev->ctxlist_mutex);
 	if (!list_empty(&dev->ctxlist->head)) {
 		drm_ctx_list_t *pos, *n;
 
···
 			}
 		}
 	}
-	up(&dev->ctxlist_sem);
+	mutex_unlock(&dev->ctxlist_mutex);
 
 	return 0;
 }

drivers/char/drm/drm_drv.c

···
 	if (dev->irq_enabled)
 		drm_irq_uninstall(dev);
 
-	down(&dev->struct_sem);
+	mutex_lock(&dev->struct_mutex);
 	del_timer(&dev->timer);
 
 	/* Clear pid list */
···
 		dev->lock.filp = NULL;
 		wake_up_interruptible(&dev->lock.lock_queue);
 	}
-	up(&dev->struct_sem);
+	mutex_unlock(&dev->struct_mutex);
 
 	DRM_DEBUG("lastclose completed\n");
 	return 0;

drivers/char/drm/drm_fops.c

···
 			goto out_free;
 	}
 
-	down(&dev->struct_sem);
+	mutex_lock(&dev->struct_mutex);
 	if (!dev->file_last) {
 		priv->next = NULL;
 		priv->prev = NULL;
···
 		dev->file_last->next = priv;
 		dev->file_last = priv;
 	}
-	up(&dev->struct_sem);
+	mutex_unlock(&dev->struct_mutex);
 
 #ifdef __alpha__
 	/*
···
 
 	drm_fasync(-1, filp, 0);
 
-	down(&dev->ctxlist_sem);
+	mutex_lock(&dev->ctxlist_mutex);
 	if (dev->ctxlist && (!list_empty(&dev->ctxlist->head))) {
 		drm_ctx_list_t *pos, *n;
 
···
 			}
 		}
 	}
-	up(&dev->ctxlist_sem);
+	mutex_unlock(&dev->ctxlist_mutex);
 
-	down(&dev->struct_sem);
+	mutex_lock(&dev->struct_mutex);
 	if (priv->remove_auth_on_close == 1) {
 		drm_file_t *temp = dev->file_first;
 		while (temp) {
···
 	} else {
 		dev->file_last = priv->prev;
 	}
-	up(&dev->struct_sem);
+	mutex_unlock(&dev->struct_mutex);
 
 	if (dev->driver->postclose)
 		dev->driver->postclose(dev, priv);

drivers/char/drm/drm_ioctl.c

···
 		return -EFAULT;
 	idx = map.offset;
 
-	down(&dev->struct_sem);
+	mutex_lock(&dev->struct_mutex);
 	if (idx < 0) {
-		up(&dev->struct_sem);
+		mutex_unlock(&dev->struct_mutex);
 		return -EINVAL;
 	}
 
···
 		i++;
 	}
 	if (!r_list || !r_list->map) {
-		up(&dev->struct_sem);
+		mutex_unlock(&dev->struct_mutex);
 		return -EINVAL;
 	}
 
···
 	map.flags = r_list->map->flags;
 	map.handle = (void *)(unsigned long)r_list->user_token;
 	map.mtrr = r_list->map->mtrr;
-	up(&dev->struct_sem);
+	mutex_unlock(&dev->struct_mutex);
 
 	if (copy_to_user(argp, &map, sizeof(map)))
 		return -EFAULT;
···
 	if (copy_from_user(&client, argp, sizeof(client)))
 		return -EFAULT;
 	idx = client.idx;
-	down(&dev->struct_sem);
+	mutex_lock(&dev->struct_mutex);
 	for (i = 0, pt = dev->file_first; i < idx && pt; i++, pt = pt->next) ;
 
 	if (!pt) {
-		up(&dev->struct_sem);
+		mutex_unlock(&dev->struct_mutex);
 		return -EINVAL;
 	}
 	client.auth = pt->authenticated;
···
 	client.uid = pt->uid;
 	client.magic = pt->magic;
 	client.iocs = pt->ioctl_count;
-	up(&dev->struct_sem);
+	mutex_unlock(&dev->struct_mutex);
 
 	if (copy_to_user(argp, &client, sizeof(client)))
 		return -EFAULT;
···
 
 	memset(&stats, 0, sizeof(stats));
 
-	down(&dev->struct_sem);
+	mutex_lock(&dev->struct_mutex);
 
 	for (i = 0; i < dev->counters; i++) {
 		if (dev->types[i] == _DRM_STAT_LOCK)
···
 
 	stats.count = dev->counters;
 
-	up(&dev->struct_sem);
+	mutex_unlock(&dev->struct_mutex);
 
 	if (copy_to_user((drm_stats_t __user *) arg, &stats, sizeof(stats)))
 		return -EFAULT;

drivers/char/drm/drm_irq.c

···
 	if (dev->irq == 0)
 		return -EINVAL;
 
-	down(&dev->struct_sem);
+	mutex_lock(&dev->struct_mutex);
 
 	/* Driver must have been initialized */
 	if (!dev->dev_private) {
-		up(&dev->struct_sem);
+		mutex_unlock(&dev->struct_mutex);
 		return -EINVAL;
 	}
 
 	if (dev->irq_enabled) {
-		up(&dev->struct_sem);
+		mutex_unlock(&dev->struct_mutex);
 		return -EBUSY;
 	}
 	dev->irq_enabled = 1;
-	up(&dev->struct_sem);
+	mutex_unlock(&dev->struct_mutex);
 
 	DRM_DEBUG("%s: irq=%d\n", __FUNCTION__, dev->irq);
 
···
 	ret = request_irq(dev->irq, dev->driver->irq_handler,
 			  sh_flags, dev->devname, dev);
 	if (ret < 0) {
-		down(&dev->struct_sem);
+		mutex_lock(&dev->struct_mutex);
 		dev->irq_enabled = 0;
-		up(&dev->struct_sem);
+		mutex_unlock(&dev->struct_mutex);
 		return ret;
 	}
 
···
 	if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ))
 		return -EINVAL;
 
-	down(&dev->struct_sem);
+	mutex_lock(&dev->struct_mutex);
 	irq_enabled = dev->irq_enabled;
 	dev->irq_enabled = 0;
-	up(&dev->struct_sem);
+	mutex_unlock(&dev->struct_mutex);
 
 	if (!irq_enabled)
 		return -EINVAL;

drivers/char/drm/drm_proc.c

···
 }
 
 /**
- * Simply calls _vm_info() while holding the drm_device::struct_sem lock.
+ * Simply calls _vm_info() while holding the drm_device::struct_mutex lock.
  */
 static int drm_vm_info(char *buf, char **start, off_t offset, int request,
 		       int *eof, void *data)
···
 	drm_device_t *dev = (drm_device_t *) data;
 	int ret;
 
-	down(&dev->struct_sem);
+	mutex_lock(&dev->struct_mutex);
 	ret = drm__vm_info(buf, start, offset, request, eof, data);
-	up(&dev->struct_sem);
+	mutex_unlock(&dev->struct_mutex);
 	return ret;
 }
 
···
 }
 
 /**
- * Simply calls _queues_info() while holding the drm_device::struct_sem lock.
+ * Simply calls _queues_info() while holding the drm_device::struct_mutex lock.
  */
 static int drm_queues_info(char *buf, char **start, off_t offset, int request,
 			   int *eof, void *data)
···
 	drm_device_t *dev = (drm_device_t *) data;
 	int ret;
 
-	down(&dev->struct_sem);
+	mutex_lock(&dev->struct_mutex);
 	ret = drm__queues_info(buf, start, offset, request, eof, data);
-	up(&dev->struct_sem);
+	mutex_unlock(&dev->struct_mutex);
 	return ret;
 }
 
···
 }
 
 /**
- * Simply calls _bufs_info() while holding the drm_device::struct_sem lock.
+ * Simply calls _bufs_info() while holding the drm_device::struct_mutex lock.
  */
 static int drm_bufs_info(char *buf, char **start, off_t offset, int request,
 			 int *eof, void *data)
···
 	drm_device_t *dev = (drm_device_t *) data;
 	int ret;
 
-	down(&dev->struct_sem);
+	mutex_lock(&dev->struct_mutex);
 	ret = drm__bufs_info(buf, start, offset, request, eof, data);
-	up(&dev->struct_sem);
+	mutex_unlock(&dev->struct_mutex);
 	return ret;
 }
 
···
 }
 
 /**
- * Simply calls _clients_info() while holding the drm_device::struct_sem lock.
+ * Simply calls _clients_info() while holding the drm_device::struct_mutex lock.
  */
 static int drm_clients_info(char *buf, char **start, off_t offset,
 			    int request, int *eof, void *data)
···
 	drm_device_t *dev = (drm_device_t *) data;
 	int ret;
 
-	down(&dev->struct_sem);
+	mutex_lock(&dev->struct_mutex);
 	ret = drm__clients_info(buf, start, offset, request, eof, data);
-	up(&dev->struct_sem);
+	mutex_unlock(&dev->struct_mutex);
 	return ret;
 }
 
···
 	drm_device_t *dev = (drm_device_t *) data;
 	int ret;
 
-	down(&dev->struct_sem);
+	mutex_lock(&dev->struct_mutex);
 	ret = drm__vma_info(buf, start, offset, request, eof, data);
-	up(&dev->struct_sem);
+	mutex_unlock(&dev->struct_mutex);
 	return ret;
 }
 #endif

drivers/char/drm/drm_stub.c

···
 
 	spin_lock_init(&dev->count_lock);
 	init_timer(&dev->timer);
-	sema_init(&dev->struct_sem, 1);
-	sema_init(&dev->ctxlist_sem, 1);
+	mutex_init(&dev->struct_mutex);
+	mutex_init(&dev->ctxlist_mutex);
 
 	dev->pdev = pdev;
 

drivers/char/drm/drm_vm.c

···
 
 	map = vma->vm_private_data;
 
-	down(&dev->struct_sem);
+	mutex_lock(&dev->struct_mutex);
 	for (pt = dev->vmalist, prev = NULL; pt; pt = next) {
 		next = pt->next;
 		if (pt->vma->vm_private_data == map)
···
 			drm_free(map, sizeof(*map), DRM_MEM_MAPS);
 		}
 	}
-	up(&dev->struct_sem);
+	mutex_unlock(&dev->struct_mutex);
 }
 
 /**
···
 
 	vma_entry = drm_alloc(sizeof(*vma_entry), DRM_MEM_VMAS);
 	if (vma_entry) {
-		down(&dev->struct_sem);
+		mutex_lock(&dev->struct_mutex);
 		vma_entry->vma = vma;
 		vma_entry->next = dev->vmalist;
 		vma_entry->pid = current->pid;
 		dev->vmalist = vma_entry;
-		up(&dev->struct_sem);
+		mutex_unlock(&dev->struct_mutex);
 	}
 }
 
···
 		  vma->vm_start, vma->vm_end - vma->vm_start);
 	atomic_dec(&dev->vma_count);
 
-	down(&dev->struct_sem);
+	mutex_lock(&dev->struct_mutex);
 	for (pt = dev->vmalist, prev = NULL; pt; prev = pt, pt = pt->next) {
 		if (pt->vma == vma) {
 			if (prev) {
···
 			break;
 		}
 	}
-	up(&dev->struct_sem);
+	mutex_unlock(&dev->struct_mutex);
 }
 
 /**