msm: kgsl: Remove sync fence names

Generating a sync fence name by allocating memory dynamically and using
scnprintf in a hot path results in excessive CPU time wasted on unneeded
debug info. Remove the name generation entirely to cut down CPU waste in
the GPU's rendering hot path.

Signed-off-by: Sultan Alsawaf <sultan@kerneltoast.com>

drivers/gpu/msm/kgsl.c

@@ -2331,7 +2331,7 @@ static long gpuobj_free_on_fence(struct kgsl_device_private *dev_priv,
 	}
 
 	handle = kgsl_sync_fence_async_wait(event.fd,
-		gpuobj_free_fence_func, entry, NULL);
+		gpuobj_free_fence_func, entry);
 
 	if (IS_ERR(handle)) {
 		kgsl_mem_entry_unset_pend(entry);

drivers/gpu/msm/kgsl_drawobj.c

@@ -34,18 +34,6 @@
 static struct kmem_cache *memobjs_cache;
 static struct kmem_cache *sparseobjs_cache;
 
-static void free_fence_names(struct kgsl_drawobj_sync *syncobj)
-{
-	unsigned int i;
-
-	for (i = 0; i < syncobj->numsyncs; i++) {
-		struct kgsl_drawobj_sync_event *event = &syncobj->synclist[i];
-
-		if (event->type == KGSL_CMD_SYNCPOINT_TYPE_FENCE)
-			kfree(event->info.fences);
-	}
-}
-
 void kgsl_drawobj_destroy_object(struct kref *kref)
 {
 	struct kgsl_drawobj *drawobj = container_of(kref,
@@ -378,8 +366,7 @@ static int drawobj_add_sync_fence(struct kgsl_device *device,
 	set_bit(event->id, &syncobj->pending);
 
 	event->handle = kgsl_sync_fence_async_wait(sync->fd,
-				drawobj_sync_fence_func, event,
-				&event->info);
+				drawobj_sync_fence_func, event);
 
 	if (IS_ERR_OR_NULL(event->handle)) {
 		int ret = PTR_ERR(event->handle);

drivers/gpu/msm/kgsl_drawobj.h

@@ -100,12 +100,6 @@ struct kgsl_drawobj_sync {
 	unsigned long timeout_jiffies;
 };
 
-#define KGSL_FENCE_NAME_LEN 74
-
-struct event_fence_info {
-	int num_fences;
-};
-
 /**
  * struct kgsl_drawobj_sync_event
  * @id: identifer (positiion within the pending bitmap)
@@ -126,7 +120,6 @@ struct kgsl_drawobj_sync_event {
 	unsigned int timestamp;
 	struct kgsl_sync_fence_cb *handle;
 	struct kgsl_device *device;
-	struct event_fence_info info;
 };
 
 /**

drivers/gpu/msm/kgsl_sync.c

@@ -397,7 +397,7 @@ static void kgsl_sync_fence_callback(struct dma_fence *fence,
 }
 
 struct kgsl_sync_fence_cb *kgsl_sync_fence_async_wait(int fd,
-	bool (*func)(void *priv), void *priv, struct event_fence_info *info_ptr)
+	bool (*func)(void *priv), void *priv)
 {
 	struct kgsl_sync_fence_cb *kcb;
 	struct dma_fence *fence;

drivers/gpu/msm/kgsl_sync.h

@@ -84,8 +84,7 @@ void kgsl_sync_timeline_destroy(struct kgsl_context *context);
 void kgsl_sync_timeline_put(struct kgsl_sync_timeline *ktimeline);
 
 struct kgsl_sync_fence_cb *kgsl_sync_fence_async_wait(int fd,
-					bool (*func)(void *priv), void *priv,
-					struct event_fence_info *info_ptr);
+					bool (*func)(void *priv), void *priv);
 
 void kgsl_sync_fence_async_cancel(struct kgsl_sync_fence_cb *kcb);
 
@@ -127,8 +126,7 @@ static inline void kgsl_sync_timeline_put(struct kgsl_sync_timeline *ktimeline)
 
 
 static inline struct kgsl_sync_fence_cb *kgsl_sync_fence_async_wait(int fd,
-					bool (*func)(void *priv), void *priv,
-					struct event_fence_info *info_ptr)
+					bool (*func)(void *priv), void *priv)
 {
 	return NULL;
 }