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drm/ttm: Use the hashtab _rcu interface for ttm_objects 

Also move a kref_init() out of spinlocked region

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Thomas Hellstrom 2012-11-20 12:16:51 +00:00 committed by Dave Airlie
parent ae8df2ae8a
commit 5293908afa
1 changed files with 14 additions and 7 deletions
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21
drivers/gpu/drm/ttm/ttm_object.c
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@ -157,11 +157,11 @@ int ttm_base_object_init(struct ttm_object_file *tfile,
base->refcount_release = refcount_release;
base->ref_obj_release = ref_obj_release;
base->object_type = object_type;
spin_lock(&tdev->object_lock);
kref_init(&base->refcount);
ret = drm_ht_just_insert_please(&tdev->object_hash,
&base->hash,
(unsigned long)base, 31, 0, 0);
spin_lock(&tdev->object_lock);
ret = drm_ht_just_insert_please_rcu(&tdev->object_hash,
&base->hash,
(unsigned long)base, 31, 0, 0);
spin_unlock(&tdev->object_lock);
if (unlikely(ret != 0))
goto out_err0;
@ -175,7 +175,7 @@ int ttm_base_object_init(struct ttm_object_file *tfile,
return 0;
out_err1:
spin_lock(&tdev->object_lock);
(void)drm_ht_remove_item(&tdev->object_hash, &base->hash);
(void)drm_ht_remove_item_rcu(&tdev->object_hash, &base->hash);
spin_unlock(&tdev->object_lock);
out_err0:
return ret;
@ -189,8 +189,15 @@ static void ttm_release_base(struct kref *kref)
struct ttm_object_device *tdev = base->tfile->tdev;
spin_lock(&tdev->object_lock);
(void)drm_ht_remove_item(&tdev->object_hash, &base->hash);
(void)drm_ht_remove_item_rcu(&tdev->object_hash, &base->hash);
spin_unlock(&tdev->object_lock);
/*
* Note: We don't use synchronize_rcu() here because it's far
* too slow. It's up to the user to free the object using
* call_rcu() or ttm_base_object_kfree().
*/
if (base->refcount_release) {
ttm_object_file_unref(&base->tfile);
base->refcount_release(&base);
@ -216,7 +223,7 @@ struct ttm_base_object *ttm_base_object_lookup(struct ttm_object_file *tfile,
int ret;
rcu_read_lock();
ret = drm_ht_find_item(&tdev->object_hash, key, &hash);
ret = drm_ht_find_item_rcu(&tdev->object_hash, key, &hash);
if (likely(ret == 0)) {
base = drm_hash_entry(hash, struct ttm_base_object, hash);