drm/ttm: Memory accounting rework.

Use inclusive zones to simplify accounting and its sysfs representation.
Use DMA32 accounting where applicable.

Add a sysfs interface to make the heuristically determined limits
readable and configurable.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@linux.ie>

1 files changed, 1 insertions, 3 deletions

diff --git a/drivers/gpu/drm/ttm/ttm_global.c b/drivers/gpu/drm/ttm/ttm_global.c
index 0b14eb1972b..541744d00d3 100644
--- a/drivers/gpu/drm/ttm/ttm_global.c
+++ b/drivers/gpu/drm/ttm/ttm_global.c
@@ -71,7 +71,7 @@ int ttm_global_item_ref(struct ttm_global_reference *ref)
 
         mutex_lock(&item->mutex);
         if (item->refcount == 0) {
-                item->object = kmalloc(ref->size, GFP_KERNEL);
+                item->object = kzalloc(ref->size, GFP_KERNEL);
                 if (unlikely(item->object == NULL)) {
                         ret = -ENOMEM;
                         goto out_err;
@@ -89,7 +89,6 @@ int ttm_global_item_ref(struct ttm_global_reference *ref)
         mutex_unlock(&item->mutex);
         return 0;
 out_err:
-        kfree(item->object);
         mutex_unlock(&item->mutex);
         item->object = NULL;
         return ret;
@@ -105,7 +104,6 @@ void ttm_global_item_unref(struct ttm_global_reference *ref)
         BUG_ON(ref->object != item->object);
         if (--item->refcount == 0) {
                 ref->release(ref);
-                kfree(item->object);
                 item->object = NULL;
         }
         mutex_unlock(&item->mutex);