drm: cleanup use of Linux list handling macros

This makes the drms use of the list handling macros a lot cleaner
and more along the lines of how they should be used and uses them
in some more places.

Signed-off-by: Dave Airlie <airlied@linux.ie>

1 files changed, 10 insertions, 24 deletions

diff --git a/drivers/char/drm/drm_vm.c b/drivers/char/drm/drm_vm.c
index b5c5b9fa84c..948e60d272d 100644
--- a/drivers/char/drm/drm_vm.c
+++ b/drivers/char/drm/drm_vm.c
@@ -116,7 +116,7 @@ static __inline__ struct page *drm_do_vm_nopage(struct vm_area_struct *vma,
                 /*
                  * It's AGP memory - find the real physical page to map
                  */
-                for (agpmem = dev->agp->memory; agpmem; agpmem = agpmem->next) {
+                list_for_each_entry(agpmem, &dev->agp->memory, head) {
                         if (agpmem->bound <= baddr &&
                             agpmem->bound + agpmem->pages * PAGE_SIZE > baddr)
                                 break;
@@ -196,10 +196,9 @@ static void drm_vm_shm_close(struct vm_area_struct *vma)
 {
         drm_file_t *priv = vma->vm_file->private_data;
         drm_device_t *dev = priv->head->dev;
-        drm_vma_entry_t *pt, *prev, *next;
+        drm_vma_entry_t *pt, *temp;
         drm_map_t *map;
         drm_map_list_t *r_list;
-        struct list_head *list;
         int found_maps = 0;
 
         DRM_DEBUG("0x%08lx,0x%08lx\n",
@@ -209,30 +208,22 @@ static void drm_vm_shm_close(struct vm_area_struct *vma)
         map = vma->vm_private_data;
 
         mutex_lock(&dev->struct_mutex);
-        for (pt = dev->vmalist, prev = NULL; pt; pt = next) {
-                next = pt->next;
+        list_for_each_entry_safe(pt, temp, &dev->vmalist, head) {
                 if (pt->vma->vm_private_data == map)
                         found_maps++;
                 if (pt->vma == vma) {
-                        if (prev) {
-                                prev->next = pt->next;
-                        } else {
-                                dev->vmalist = pt->next;
-                        }
+                        list_del(&pt->head);
                         drm_free(pt, sizeof(*pt), DRM_MEM_VMAS);
-                } else {
-                        prev = pt;
                 }
         }
+
         /* We were the only map that was found */
         if (found_maps == 1 && map->flags & _DRM_REMOVABLE) {
                 /* Check to see if we are in the maplist, if we are not, then
                  * we delete this mappings information.
                  */
                 found_maps = 0;
-                list = &dev->maplist->head;
-                list_for_each(list, &dev->maplist->head) {
-                        r_list = list_entry(list, drm_map_list_t, head);
+                list_for_each_entry(r_list, &dev->maplist, head) {
                         if (r_list->map == map)
                                 found_maps++;
                 }
@@ -425,9 +416,8 @@ static void drm_vm_open_locked(struct vm_area_struct *vma)
         vma_entry = drm_alloc(sizeof(*vma_entry), DRM_MEM_VMAS);
         if (vma_entry) {
                 vma_entry->vma = vma;
-                vma_entry->next = dev->vmalist;
                 vma_entry->pid = current->pid;
-                dev->vmalist = vma_entry;
+                list_add(&vma_entry->head, &dev->vmalist);
         }
 }
 
@@ -453,20 +443,16 @@ static void drm_vm_close(struct vm_area_struct *vma)
 {
         drm_file_t *priv = vma->vm_file->private_data;
         drm_device_t *dev = priv->head->dev;
-        drm_vma_entry_t *pt, *prev;
+        drm_vma_entry_t *pt, *temp;
 
         DRM_DEBUG("0x%08lx,0x%08lx\n",
                   vma->vm_start, vma->vm_end - vma->vm_start);
         atomic_dec(&dev->vma_count);
 
         mutex_lock(&dev->struct_mutex);
-        for (pt = dev->vmalist, prev = NULL; pt; prev = pt, pt = pt->next) {
+        list_for_each_entry_safe(pt, temp, &dev->vmalist, head) {
                 if (pt->vma == vma) {
-                        if (prev) {
-                                prev->next = pt->next;
-                        } else {
-                                dev->vmalist = pt->next;
-                        }
+                        list_del(&pt->head);
                         drm_free(pt, sizeof(*pt), DRM_MEM_VMAS);
                         break;
                 }