diff options
| author |   Thomas Hellstrom <thellstrom@vmware.com> | 2012-11-06 11:31:50 +0000 |
|---|---|---|
| committer |   Dave Airlie <airlied@redhat.com> | 2012-11-20 16:15:05 +1000 |
| commit | cdad05216c2b2edfe92a9f87d6ae51aab277f3b2 (patch) | |
| tree | 1ba899709b77745acec655d0a8eea3f08c97a885 /include/drm | |
| parent | kref: Implement kref_get_unless_zero v3 (diff) | |
| download | linux-dev-cdad05216c2b2edfe92a9f87d6ae51aab277f3b2.tar.xz linux-dev-cdad05216c2b2edfe92a9f87d6ae51aab277f3b2.zip | |
drm/ttm, drm/vmwgfx: Use RCU locking for object lookups v3
The mostly used lookup+get put+potential_destroy path of TTM objects
is converted to use RCU locks. This will substantially decrease the amount
of locked bus cycles during normal operation.
Since we use kfree_rcu to free the objects, no rcu synchronization is needed
at module unload time.
v2: Don't touch include/linux/kref.h
v3: Adapt to kref_get_unless_zero return value change
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'include/drm')
| -rw-r--r-- | include/drm/ttm/ttm_object.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/drm/ttm/ttm_object.h b/include/drm/ttm/ttm_object.h index b01c563b2751..fc0cf0649901 100644 --- a/include/drm/ttm/ttm_object.h +++ b/include/drm/ttm/ttm_object.h @@ -40,6 +40,7 @@ #include <linux/list.h> #include <drm/drm_hashtab.h> #include <linux/kref.h> +#include <linux/rcupdate.h> #include <ttm/ttm_memory.h> /** @@ -120,6 +121,7 @@ struct ttm_object_device; */ struct ttm_base_object { + struct rcu_head rhead; struct drm_hash_item hash; enum ttm_object_type object_type; bool shareable; @@ -268,4 +270,6 @@ extern struct ttm_object_device *ttm_object_device_init extern void ttm_object_device_release(struct ttm_object_device **p_tdev); +#define ttm_base_object_kfree(__object, __base)\ + kfree_rcu(__object, __base.rhead) #endif |