@@ -25,11 +25,18 @@ static struct intel_context *intel_context_alloc(void)
return kmem_cache_zalloc(global.slab_ce, GFP_KERNEL);
}
-void intel_context_free(struct intel_context *ce)
+static void rcu_context_free(struct rcu_head *rcu)
{
+ struct intel_context *ce = container_of(rcu, typeof(*ce), rcu);
+
kmem_cache_free(global.slab_ce, ce);
}
+void intel_context_free(struct intel_context *ce)
+{
+ call_rcu(&ce->rcu, rcu_context_free);
+}
+
struct intel_context *
intel_context_create(struct intel_engine_cs *engine)
{
@@ -356,8 +363,7 @@ static int __intel_context_active(struct i915_active *active)
}
void
-intel_context_init(struct intel_context *ce,
- struct intel_engine_cs *engine)
+intel_context_init(struct intel_context *ce, struct intel_engine_cs *engine)
{
GEM_BUG_ON(!engine->cops);
GEM_BUG_ON(!engine->gt->vm);
@@ -44,7 +44,16 @@ struct intel_context_ops {
};
struct intel_context {
- struct kref ref;
+ /*
+ * Note: Some fields may be accessed under RCU.
+ *
+ * Unless otherwise noted a field can safely be assumed to be protected
+ * by strong reference counting.
+ */
+ union {
+ struct kref ref; /* no kref_get_unless_zero()! */
+ struct rcu_head rcu;
+ };
struct intel_engine_cs *engine;
struct intel_engine_cs *inflight;