drm/i915: Mark up i915_gem_active for locking annotation

The future annotations will track the locking used for access to ensure
that it is always sufficient. We make the preparations now to present
the API ahead and to make sure that GCC can eliminate the unused
parameter.

Before:	6298417 3619610  696320 10614347         a1f64b vmlinux
After:	6298417 3619610  696320 10614347         a1f64b vmlinux
(with i915 builtin)

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1470293567-10811-12-git-send-email-chris@chris-wilson.co.uk

1 files changed, 23 insertions, 13 deletions

diff --git a/drivers/gpu/drm/i915/i915_gem_request.h b/drivers/gpu/drm/i915/i915_gem_request.h
index e13834e2e3e0..5f8d94cb5f7d 100644
--- a/drivers/gpu/drm/i915/i915_gem_request.h
+++ b/drivers/gpu/drm/i915/i915_gem_request.h
@@ -296,6 +296,12 @@ i915_gem_active_set(struct i915_gem_active *active,
 	i915_gem_request_assign(&active->request, request);
 }
 
+static inline struct drm_i915_gem_request *
+__i915_gem_active_peek(const struct i915_gem_active *active)
+{
+	return active->request;
+}
+
 /**
  * i915_gem_active_peek - report the request being monitored
  * @active - the active tracker
@@ -305,7 +311,7 @@ i915_gem_active_set(struct i915_gem_active *active,
  * caller must hold struct_mutex.
  */
 static inline struct drm_i915_gem_request *
-i915_gem_active_peek(const struct i915_gem_active *active)
+i915_gem_active_peek(const struct i915_gem_active *active, struct mutex *mutex)
 {
 	return active->request;
 }
@@ -318,11 +324,11 @@ i915_gem_active_peek(const struct i915_gem_active *active)
  * if the active tracker is idle. The caller must hold struct_mutex.
  */
 static inline struct drm_i915_gem_request *
-i915_gem_active_get(const struct i915_gem_active *active)
+i915_gem_active_get(const struct i915_gem_active *active, struct mutex *mutex)
 {
 	struct drm_i915_gem_request *request;
 
-	request = i915_gem_active_peek(active);
+	request = i915_gem_active_peek(active, mutex);
 	if (!request || i915_gem_request_completed(request))
 		return NULL;
 
@@ -352,11 +358,12 @@ i915_gem_active_isset(const struct i915_gem_active *active)
  * the caller to hold struct_mutex (but that can be relaxed if desired).
  */
 static inline bool
-i915_gem_active_is_idle(const struct i915_gem_active *active)
+i915_gem_active_is_idle(const struct i915_gem_active *active,
+			struct mutex *mutex)
 {
 	struct drm_i915_gem_request *request;
 
-	request = i915_gem_active_peek(active);
+	request = i915_gem_active_peek(active, mutex);
 	if (!request || i915_gem_request_completed(request))
 		return true;
 
@@ -372,11 +379,11 @@ i915_gem_active_is_idle(const struct i915_gem_active *active)
  * retired first, see i915_gem_active_retire().
  */
 static inline int __must_check
-i915_gem_active_wait(const struct i915_gem_active *active)
+i915_gem_active_wait(const struct i915_gem_active *active, struct mutex *mutex)
 {
 	struct drm_i915_gem_request *request;
 
-	request = i915_gem_active_peek(active);
+	request = i915_gem_active_peek(active, mutex);
 	if (!request)
 		return 0;
 
@@ -393,9 +400,10 @@ i915_gem_active_wait(const struct i915_gem_active *active)
  * tracker is idle, the function returns immediately.
  */
 static inline int __must_check
-i915_gem_active_retire(const struct i915_gem_active *active)
+i915_gem_active_retire(const struct i915_gem_active *active,
+		       struct mutex *mutex)
 {
-	return i915_gem_active_wait(active);
+	return i915_gem_active_wait(active, mutex);
 }
 
 /* Convenience functions for peeking at state inside active's request whilst
@@ -403,15 +411,17 @@ i915_gem_active_retire(const struct i915_gem_active *active)
  */
 
 static inline uint32_t
-i915_gem_active_get_seqno(const struct i915_gem_active *active)
+i915_gem_active_get_seqno(const struct i915_gem_active *active,
+			  struct mutex *mutex)
 {
-	return i915_gem_request_get_seqno(i915_gem_active_peek(active));
+	return i915_gem_request_get_seqno(i915_gem_active_peek(active, mutex));
 }
 
 static inline struct intel_engine_cs *
-i915_gem_active_get_engine(const struct i915_gem_active *active)
+i915_gem_active_get_engine(const struct i915_gem_active *active,
+			   struct mutex *mutex)
 {
-	return i915_gem_request_get_engine(i915_gem_active_peek(active));
+	return i915_gem_request_get_engine(i915_gem_active_peek(active, mutex));
 }
 
 #define for_each_active(mask, idx) \