sem2mutex: drivers/char/drm/

From: Arjan van de Ven <arjan@infradead.org>

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 <arjan@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Dave Airlie <airlied@linux.ie>

11 files changed, 126 insertions, 125 deletions

diff --git a/drivers/char/drm/drmP.h b/drivers/char/drm/drmP.h
index 54b561e69486..71b8b32b075f 100644
--- a/drivers/char/drm/drmP.h
+++ b/drivers/char/drm/drmP.h
@@ -57,6 +57,7 @@
 #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
@@ -623,7 +624,7 @@ typedef struct drm_device {
         /** \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 */
@@ -658,7 +659,7 @@ typedef struct drm_device {
         /*@{ */
         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;
diff --git a/drivers/char/drm/drm_auth.c b/drivers/char/drm/drm_auth.c
index a47b502bc7cc..2a37586a7ee8 100644
--- a/drivers/char/drm/drm_auth.c
+++ b/drivers/char/drm/drm_auth.c
@@ -56,7 +56,7 @@ static int drm_hash_magic(drm_magic_t magic)
  * \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)
@@ -65,14 +65,14 @@ 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;
 }
 
@@ -85,7 +85,7 @@ static drm_file_t *drm_find_file(drm_device_t * dev, drm_magic_t magic)
  *
  * 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)
@@ -104,7 +104,7 @@ static int drm_add_magic(drm_device_t * dev, drm_file_t * priv,
         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;
@@ -112,7 +112,7 @@ static int drm_add_magic(drm_device_t * dev, drm_file_t * priv,
                 dev->magiclist[hash].head = entry;
                 dev->magiclist[hash].tail = entry;
         }
-        up(&dev->struct_sem);
+        mutex_unlock(&dev->struct_mutex);
 
         return 0;
 }
@@ -124,7 +124,7 @@ static int drm_add_magic(drm_device_t * dev, drm_file_t * priv,
  * \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)
 {
@@ -135,7 +135,7 @@ 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) {
@@ -147,11 +147,11 @@ static int drm_remove_magic(drm_device_t * dev, drm_magic_t magic)
                         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);
 
diff --git a/drivers/char/drm/drm_bufs.c b/drivers/char/drm/drm_bufs.c
index 1db12dcb6802..e2637b4d51de 100644
--- a/drivers/char/drm/drm_bufs.c
+++ b/drivers/char/drm/drm_bufs.c
@@ -255,14 +255,14 @@ static int drm_addmap_core(drm_device_t * dev, unsigned int offset,
         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;
@@ -392,9 +392,9 @@ int drm_rmmap(drm_device_t *dev, drm_local_map_t *map)
 {
         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;
 }
@@ -423,7 +423,7 @@ int drm_rmmap_ioctl(struct inode *inode, struct file *filp,
                 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);
 
@@ -439,7 +439,7 @@ int drm_rmmap_ioctl(struct inode *inode, struct file *filp,
          * find anything.
          */
         if (list == (&dev->maplist->head)) {
-                up(&dev->struct_sem);
+                mutex_unlock(&dev->struct_mutex);
                 return -EINVAL;
         }
 
@@ -448,13 +448,13 @@ int drm_rmmap_ioctl(struct inode *inode, struct file *filp,
 
         /* 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;
 }
@@ -566,16 +566,16 @@ int drm_addbufs_agp(drm_device_t * dev, drm_buf_desc_t * request)
         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;
         }
@@ -583,7 +583,7 @@ int drm_addbufs_agp(drm_device_t * dev, drm_buf_desc_t * request)
         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;
         }
@@ -616,7 +616,7 @@ int drm_addbufs_agp(drm_device_t * dev, drm_buf_desc_t * request)
                         /* 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;
                 }
@@ -638,7 +638,7 @@ int drm_addbufs_agp(drm_device_t * dev, drm_buf_desc_t * request)
         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;
         }
@@ -656,7 +656,7 @@ int drm_addbufs_agp(drm_device_t * dev, drm_buf_desc_t * request)
         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;
@@ -722,16 +722,16 @@ int drm_addbufs_pci(drm_device_t * dev, drm_buf_desc_t * request)
         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;
         }
@@ -739,7 +739,7 @@ int drm_addbufs_pci(drm_device_t * dev, drm_buf_desc_t * request)
         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;
         }
@@ -750,7 +750,7 @@ int drm_addbufs_pci(drm_device_t * dev, drm_buf_desc_t * request)
         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;
         }
@@ -766,7 +766,7 @@ int drm_addbufs_pci(drm_device_t * dev, drm_buf_desc_t * request)
                          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;
         }
@@ -790,7 +790,7 @@ int drm_addbufs_pci(drm_device_t * dev, drm_buf_desc_t * request)
                         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;
                 }
@@ -831,7 +831,7 @@ int drm_addbufs_pci(drm_device_t * dev, drm_buf_desc_t * request)
                                           (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;
                         }
@@ -853,7 +853,7 @@ int drm_addbufs_pci(drm_device_t * dev, drm_buf_desc_t * request)
                 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;
         }
@@ -878,7 +878,7 @@ int drm_addbufs_pci(drm_device_t * dev, drm_buf_desc_t * request)
         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;
@@ -948,16 +948,16 @@ static int drm_addbufs_sg(drm_device_t * dev, drm_buf_desc_t * request)
         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;
         }
@@ -965,7 +965,7 @@ static int drm_addbufs_sg(drm_device_t * dev, drm_buf_desc_t * request)
         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;
         }
@@ -999,7 +999,7 @@ static int drm_addbufs_sg(drm_device_t * dev, drm_buf_desc_t * request)
                         /* 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;
                 }
@@ -1022,7 +1022,7 @@ static int drm_addbufs_sg(drm_device_t * dev, drm_buf_desc_t * request)
         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;
         }
@@ -1040,7 +1040,7 @@ static int drm_addbufs_sg(drm_device_t * dev, drm_buf_desc_t * request)
         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;
@@ -1110,16 +1110,16 @@ int drm_addbufs_fb(drm_device_t * dev, drm_buf_desc_t * request)
         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;
         }
@@ -1127,7 +1127,7 @@ int drm_addbufs_fb(drm_device_t * dev, drm_buf_desc_t * request)
         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;
         }
@@ -1160,7 +1160,7 @@ int drm_addbufs_fb(drm_device_t * dev, drm_buf_desc_t * request)
                         /* 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;
                 }
@@ -1182,7 +1182,7 @@ int drm_addbufs_fb(drm_device_t * dev, drm_buf_desc_t * request)
         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;
         }
@@ -1200,7 +1200,7 @@ int drm_addbufs_fb(drm_device_t * dev, drm_buf_desc_t * request)
         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;
diff --git a/drivers/char/drm/drm_context.c b/drivers/char/drm/drm_context.c
index f84254526949..83094c73da67 100644
--- a/drivers/char/drm/drm_context.c
+++ b/drivers/char/drm/drm_context.c
@@ -53,7 +53,7 @@
  * \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)
@@ -64,10 +64,10 @@ 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:
@@ -83,7 +83,7 @@ void drm_ctxbitmap_free(drm_device_t * dev, int ctx_handle)
  *
  * 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)
 {
@@ -92,7 +92,7 @@ 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);
@@ -113,7 +113,7 @@ static int drm_ctxbitmap_next(drm_device_t * dev)
                                                          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;
@@ -126,16 +126,16 @@ static int drm_ctxbitmap_next(drm_device_t * dev)
                                               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;
 }
 
@@ -145,24 +145,24 @@ static int drm_ctxbitmap_next(drm_device_t * dev)
  * \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);
@@ -178,17 +178,17 @@ int drm_ctxbitmap_init(drm_device_t * 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);
 }
 
 /*@}*/
@@ -222,15 +222,15 @@ int drm_getsareactx(struct inode *inode, struct file *filp,
         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) {
@@ -274,7 +274,7 @@ int drm_setsareactx(struct inode *inode, struct file *filp,
                            (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
@@ -282,7 +282,7 @@ int drm_setsareactx(struct inode *inode, struct file *filp,
                         goto found;
         }
       bad:
-        up(&dev->struct_sem);
+        mutex_unlock(&dev->struct_mutex);
         return -EINVAL;
 
       found:
@@ -294,7 +294,7 @@ int drm_setsareactx(struct inode *inode, struct file *filp,
         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;
 }
 
@@ -448,10 +448,10 @@ int drm_addctx(struct inode *inode, struct file *filp,
         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;
@@ -574,7 +574,7 @@ int drm_rmctx(struct inode *inode, struct file *filp,
                 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;
 
@@ -586,7 +586,7 @@ int drm_rmctx(struct inode *inode, struct file *filp,
                         }
                 }
         }
-        up(&dev->ctxlist_sem);
+        mutex_unlock(&dev->ctxlist_mutex);
 
         return 0;
 }
diff --git a/drivers/char/drm/drm_drv.c b/drivers/char/drm/drm_drv.c
index c4fa5a29582b..dc6bbe8a18dc 100644
--- a/drivers/char/drm/drm_drv.c
+++ b/drivers/char/drm/drm_drv.c
@@ -151,7 +151,7 @@ int drm_lastclose(drm_device_t * dev)
         if (dev->irq_enabled)
                 drm_irq_uninstall(dev);
 
-        down(&dev->struct_sem);
+        mutex_lock(&dev->struct_mutex);
         del_timer(&dev->timer);
 
         /* Clear pid list */
@@ -231,7 +231,7 @@ int drm_lastclose(drm_device_t * dev)
                 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;
diff --git a/drivers/char/drm/drm_fops.c b/drivers/char/drm/drm_fops.c
index 403f44a1bf01..641f7633878c 100644
--- a/drivers/char/drm/drm_fops.c
+++ b/drivers/char/drm/drm_fops.c
@@ -262,7 +262,7 @@ static int drm_open_helper(struct inode *inode, struct file *filp,
                         goto out_free;
         }
 
-        down(&dev->struct_sem);
+        mutex_lock(&dev->struct_mutex);
         if (!dev->file_last) {
                 priv->next = NULL;
                 priv->prev = NULL;
@@ -276,7 +276,7 @@ static int drm_open_helper(struct inode *inode, struct file *filp,
                 dev->file_last->next = priv;
                 dev->file_last = priv;
         }
-        up(&dev->struct_sem);
+        mutex_unlock(&dev->struct_mutex);
 
 #ifdef __alpha__
         /*
@@ -413,7 +413,7 @@ int drm_release(struct inode *inode, struct file *filp)
 
         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;
 
@@ -432,9 +432,9 @@ int drm_release(struct inode *inode, struct file *filp)
                         }
                 }
         }
-        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) {
@@ -452,7 +452,7 @@ int drm_release(struct inode *inode, struct file *filp)
         } else {
                 dev->file_last = priv->prev;
         }
-        up(&dev->struct_sem);
+        mutex_unlock(&dev->struct_mutex);
 
         if (dev->driver->postclose)
                 dev->driver->postclose(dev, priv);
diff --git a/drivers/char/drm/drm_ioctl.c b/drivers/char/drm/drm_ioctl.c
index bcd4e604d3ec..555f323b8a32 100644
--- a/drivers/char/drm/drm_ioctl.c
+++ b/drivers/char/drm/drm_ioctl.c
@@ -194,9 +194,9 @@ int drm_getmap(struct inode *inode, struct file *filp,
                 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;
         }
 
@@ -209,7 +209,7 @@ int drm_getmap(struct inode *inode, struct file *filp,
                 i++;
         }
         if (!r_list || !r_list->map) {
-                up(&dev->struct_sem);
+                mutex_unlock(&dev->struct_mutex);
                 return -EINVAL;
         }
 
@@ -219,7 +219,7 @@ int drm_getmap(struct inode *inode, struct file *filp,
         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;
@@ -253,11 +253,11 @@ int drm_getclient(struct inode *inode, struct file *filp,
         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;
@@ -265,7 +265,7 @@ int drm_getclient(struct inode *inode, struct file *filp,
         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;
@@ -292,7 +292,7 @@ int drm_getstats(struct inode *inode, struct file *filp,
 
         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)
@@ -305,7 +305,7 @@ int drm_getstats(struct inode *inode, struct file *filp,
 
         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;
diff --git a/drivers/char/drm/drm_irq.c b/drivers/char/drm/drm_irq.c
index b0d4b236e837..611a1173091d 100644
--- a/drivers/char/drm/drm_irq.c
+++ b/drivers/char/drm/drm_irq.c
@@ -98,20 +98,20 @@ static int drm_irq_install(drm_device_t * dev)
         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);
 
@@ -135,9 +135,9 @@ static int drm_irq_install(drm_device_t * dev)
         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;
         }
 
@@ -161,10 +161,10 @@ int drm_irq_uninstall(drm_device_t * dev)
         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;
diff --git a/drivers/char/drm/drm_proc.c b/drivers/char/drm/drm_proc.c
index 6f943e3309ef..362a270af0f1 100644
--- a/drivers/char/drm/drm_proc.c
+++ b/drivers/char/drm/drm_proc.c
@@ -258,7 +258,7 @@ static int drm__vm_info(char *buf, char **start, off_t offset, int request,
 }
 
 /**
- * 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)
@@ -266,9 +266,9 @@ static int drm_vm_info(char *buf, char **start, off_t offset, int request,
         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;
 }
 
@@ -331,7 +331,7 @@ static int drm__queues_info(char *buf, char **start, off_t offset,
 }
 
 /**
- * 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)
@@ -339,9 +339,9 @@ static int drm_queues_info(char *buf, char **start, off_t offset, int request,
         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;
 }
 
@@ -403,7 +403,7 @@ static int drm__bufs_info(char *buf, char **start, off_t offset, int request,
 }
 
 /**
- * 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)
@@ -411,9 +411,9 @@ static int drm_bufs_info(char *buf, char **start, off_t offset, int request,
         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;
 }
 
@@ -459,7 +459,7 @@ static int drm__clients_info(char *buf, char **start, off_t offset,
 }
 
 /**
- * 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)
@@ -467,9 +467,9 @@ static int drm_clients_info(char *buf, char **start, off_t offset,
         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;
 }
 
@@ -540,9 +540,9 @@ static int drm_vma_info(char *buf, char **start, off_t offset, int request,
         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
diff --git a/drivers/char/drm/drm_stub.c b/drivers/char/drm/drm_stub.c
index 42d766359caa..7a9263ff3007 100644
--- a/drivers/char/drm/drm_stub.c
+++ b/drivers/char/drm/drm_stub.c
@@ -61,8 +61,8 @@ static int drm_fill_in_dev(drm_device_t * dev, struct pci_dev *pdev,
 
         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;
 
diff --git a/drivers/char/drm/drm_vm.c b/drivers/char/drm/drm_vm.c
index 3f73aa774c80..0291cd62c69f 100644
--- a/drivers/char/drm/drm_vm.c
+++ b/drivers/char/drm/drm_vm.c
@@ -188,7 +188,7 @@ static void drm_vm_shm_close(struct vm_area_struct *vma)
 
         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)
@@ -248,7 +248,7 @@ static void drm_vm_shm_close(struct vm_area_struct *vma)
                         drm_free(map, sizeof(*map), DRM_MEM_MAPS);
                 }
         }
-        up(&dev->struct_sem);
+        mutex_unlock(&dev->struct_mutex);
 }
 
 /**
@@ -404,12 +404,12 @@ static void drm_vm_open(struct vm_area_struct *vma)
 
         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);
         }
 }
 
@@ -431,7 +431,7 @@ static void drm_vm_close(struct vm_area_struct *vma)
                   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) {
@@ -443,7 +443,7 @@ static void drm_vm_close(struct vm_area_struct *vma)
                         break;
                 }
         }
-        up(&dev->struct_sem);
+        mutex_unlock(&dev->struct_mutex);
 }
 
 /**