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authorThomas Hellstrom <thellstrom@vmware.com>2012-11-06 11:31:48 +0000
committerDave Airlie <airlied@redhat.com>2012-11-20 16:14:58 +1000
commitd7144556195ab04a148e722a93103da5438bdf78 (patch)
treeee152765fe715eedd06d79c647ac3d4ffba34469
parentdedfdffd448aea2543b59fd504b92b8212ab3b7d (diff)
drm: Make hashtab rcu-safe
TTM base objects will be the first consumer. Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
-rw-r--r--drivers/gpu/drm/drm_hashtab.c18
1 files changed, 7 insertions, 11 deletions
diff --git a/drivers/gpu/drm/drm_hashtab.c b/drivers/gpu/drm/drm_hashtab.c
index c3745c4d46d8..5729e390aa4e 100644
--- a/drivers/gpu/drm/drm_hashtab.c
+++ b/drivers/gpu/drm/drm_hashtab.c
@@ -67,10 +67,8 @@ void drm_ht_verbose_list(struct drm_open_hash *ht, unsigned long key)
hashed_key = hash_long(key, ht->order);
DRM_DEBUG("Key is 0x%08lx, Hashed key is 0x%08x\n", key, hashed_key);
h_list = &ht->table[hashed_key];
- hlist_for_each(list, h_list) {
- entry = hlist_entry(list, struct drm_hash_item, head);
+ hlist_for_each_entry_rcu(entry, list, h_list, head)
DRM_DEBUG("count %d, key: 0x%08lx\n", count++, entry->key);
- }
}
static struct hlist_node *drm_ht_find_key(struct drm_open_hash *ht,
@@ -83,8 +81,7 @@ static struct hlist_node *drm_ht_find_key(struct drm_open_hash *ht,
hashed_key = hash_long(key, ht->order);
h_list = &ht->table[hashed_key];
- hlist_for_each(list, h_list) {
- entry = hlist_entry(list, struct drm_hash_item, head);
+ hlist_for_each_entry_rcu(entry, list, h_list, head) {
if (entry->key == key)
return list;
if (entry->key > key)
@@ -105,8 +102,7 @@ int drm_ht_insert_item(struct drm_open_hash *ht, struct drm_hash_item *item)
hashed_key = hash_long(key, ht->order);
h_list = &ht->table[hashed_key];
parent = NULL;
- hlist_for_each(list, h_list) {
- entry = hlist_entry(list, struct drm_hash_item, head);
+ hlist_for_each_entry_rcu(entry, list, h_list, head) {
if (entry->key == key)
return -EINVAL;
if (entry->key > key)
@@ -114,9 +110,9 @@ int drm_ht_insert_item(struct drm_open_hash *ht, struct drm_hash_item *item)
parent = list;
}
if (parent) {
- hlist_add_after(parent, &item->head);
+ hlist_add_after_rcu(parent, &item->head);
} else {
- hlist_add_head(&item->head, h_list);
+ hlist_add_head_rcu(&item->head, h_list);
}
return 0;
}
@@ -171,7 +167,7 @@ int drm_ht_remove_key(struct drm_open_hash *ht, unsigned long key)
list = drm_ht_find_key(ht, key);
if (list) {
- hlist_del_init(list);
+ hlist_del_init_rcu(list);
return 0;
}
return -EINVAL;
@@ -179,7 +175,7 @@ int drm_ht_remove_key(struct drm_open_hash *ht, unsigned long key)
int drm_ht_remove_item(struct drm_open_hash *ht, struct drm_hash_item *item)
{
- hlist_del_init(&item->head);
+ hlist_del_init_rcu(&item->head);
return 0;
}
EXPORT_SYMBOL(drm_ht_remove_item);