binder: fix sparse warnings on locking context

index d6979cf7b2dad..172c207fbf99d 100644
@@ -660,6 +660,7 @@ struct binder_transaction {
 #define binder_proc_lock(proc) _binder_proc_lock(proc, __LINE__)
 static void
 _binder_proc_lock(struct binder_proc *proc, int line)
+	__acquires(&proc->outer_lock)
 {
 	binder_debug(BINDER_DEBUG_SPINLOCKS,
 		     "%s: line=%d\n", __func__, line);

@@ -675,6 +676,7 @@ _binder_proc_lock(struct binder_proc *proc, int line)
 #define binder_proc_unlock(_proc) _binder_proc_unlock(_proc, __LINE__)
 static void
 _binder_proc_unlock(struct binder_proc *proc, int line)
+	__releases(&proc->outer_lock)
 {
 	binder_debug(BINDER_DEBUG_SPINLOCKS,
 		     "%s: line=%d\n", __func__, line);

@@ -690,6 +692,7 @@ _binder_proc_unlock(struct binder_proc *proc, int line)
 #define binder_inner_proc_lock(proc) _binder_inner_proc_lock(proc, __LINE__)
 static void
 _binder_inner_proc_lock(struct binder_proc *proc, int line)
+	__acquires(&proc->inner_lock)
 {
 	binder_debug(BINDER_DEBUG_SPINLOCKS,
 		     "%s: line=%d\n", __func__, line);

@@ -705,6 +708,7 @@ _binder_inner_proc_lock(struct binder_proc *proc, int line)
 #define binder_inner_proc_unlock(proc) _binder_inner_proc_unlock(proc, __LINE__)
 static void
 _binder_inner_proc_unlock(struct binder_proc *proc, int line)
+	__releases(&proc->inner_lock)
 {
 	binder_debug(BINDER_DEBUG_SPINLOCKS,
 		     "%s: line=%d\n", __func__, line);

@@ -720,6 +724,7 @@ _binder_inner_proc_unlock(struct binder_proc *proc, int line)
 #define binder_node_lock(node) _binder_node_lock(node, __LINE__)
 static void
 _binder_node_lock(struct binder_node *node, int line)
+	__acquires(&node->lock)
 {
 	binder_debug(BINDER_DEBUG_SPINLOCKS,
 		     "%s: line=%d\n", __func__, line);

@@ -735,6 +740,7 @@ _binder_node_lock(struct binder_node *node, int line)
 #define binder_node_unlock(node) _binder_node_unlock(node, __LINE__)
 static void
 _binder_node_unlock(struct binder_node *node, int line)
+	__releases(&node->lock)
 {
 	binder_debug(BINDER_DEBUG_SPINLOCKS,
 		     "%s: line=%d\n", __func__, line);

@@ -751,12 +757,16 @@ _binder_node_unlock(struct binder_node *node, int line)
 #define binder_node_inner_lock(node) _binder_node_inner_lock(node, __LINE__)
 static void
 _binder_node_inner_lock(struct binder_node *node, int line)
+	__acquires(&node->lock) __acquires(&node->proc->inner_lock)
 {
 	binder_debug(BINDER_DEBUG_SPINLOCKS,
 		     "%s: line=%d\n", __func__, line);
 	spin_lock(&node->lock);
 	if (node->proc)
 		binder_inner_proc_lock(node->proc);
+	else
+		/* annotation for sparse */
+		__acquire(&node->proc->inner_lock);
 }
 
 /**

@@ -768,6 +778,7 @@ _binder_node_inner_lock(struct binder_node *node, int line)
 #define binder_node_inner_unlock(node) _binder_node_inner_unlock(node, __LINE__)
 static void
 _binder_node_inner_unlock(struct binder_node *node, int line)
+	__releases(&node->lock) __releases(&node->proc->inner_lock)
 {
 	struct binder_proc *proc = node->proc;
 

@@ -775,6 +786,9 @@ _binder_node_inner_unlock(struct binder_node *node, int line)
 		     "%s: line=%d\n", __func__, line);
 	if (proc)
 		binder_inner_proc_unlock(proc);
+	else
+		/* annotation for sparse */
+		__release(&node->proc->inner_lock);
 	spin_unlock(&node->lock);
 }
 

@@ -1384,10 +1398,14 @@ static void binder_dec_node_tmpref(struct binder_node *node)
 	binder_node_inner_lock(node);
 	if (!node->proc)
 		spin_lock(&binder_dead_nodes_lock);
+	else
+		__acquire(&binder_dead_nodes_lock);
 	node->tmp_refs--;
 	BUG_ON(node->tmp_refs < 0);
 	if (!node->proc)
 		spin_unlock(&binder_dead_nodes_lock);
+	else
+		__release(&binder_dead_nodes_lock);
 	/*
 	 * Call binder_dec_node() to check if all refcounts are 0
 	 * and cleanup is needed. Calling with strong=0 and internal=1

@@ -1890,18 +1908,22 @@ static struct binder_thread *binder_get_txn_from(
  */
 static struct binder_thread *binder_get_txn_from_and_acq_inner(
 		struct binder_transaction *t)
+	__acquires(&t->from->proc->inner_lock)
 {
 	struct binder_thread *from;
 
 	from = binder_get_txn_from(t);
-	if (!from)
+	if (!from) {
+		__acquire(&from->proc->inner_lock);
 		return NULL;
+	}
 	binder_inner_proc_lock(from->proc);
 	if (t->from) {
 		BUG_ON(from != t->from);
 		return from;
 	}
 	binder_inner_proc_unlock(from->proc);
+	__acquire(&from->proc->inner_lock);
 	binder_thread_dec_tmpref(from);
 	return NULL;
 }

@@ -1973,6 +1995,8 @@ static void binder_send_failed_reply(struct binder_transaction *t,
 			binder_thread_dec_tmpref(target_thread);
 			binder_free_transaction(t);
 			return;
+		} else {
+			__release(&target_thread->proc->inner_lock);
 		}
 		next = t->from_parent;
 

@@ -2394,11 +2418,15 @@ static int binder_translate_handle(struct flat_binder_object *fp,
 		fp->cookie = node->cookie;
 		if (node->proc)
 			binder_inner_proc_lock(node->proc);
+		else
+			__acquire(&node->proc->inner_lock);
 		binder_inc_node_nilocked(node,
 					 fp->hdr.type == BINDER_TYPE_BINDER,
 					 0, NULL);
 		if (node->proc)
 			binder_inner_proc_unlock(node->proc);
+		else
+			__release(&node->proc->inner_lock);
 		trace_binder_transaction_ref_to_node(t, node, &src_rdata);
 		binder_debug(BINDER_DEBUG_TRANSACTION,
 			     "        ref %d desc %d -> node %d u%016llx\n",

@@ -2762,6 +2790,8 @@ static void binder_transaction(struct binder_proc *proc,
 		binder_set_nice(in_reply_to->saved_priority);
 		target_thread = binder_get_txn_from_and_acq_inner(in_reply_to);
 		if (target_thread == NULL) {
+			/* annotation for sparse */
+			__release(&target_thread->proc->inner_lock);
 			return_error = BR_DEAD_REPLY;
 			return_error_line = __LINE__;
 			goto err_dead_binder;

@@ -4164,6 +4194,11 @@ static int binder_thread_read(struct binder_proc *proc,
 			if (cmd == BR_DEAD_BINDER)
 				goto done; /* DEAD_BINDER notifications can cause transactions */
 		} break;
+		default:
+			binder_inner_proc_unlock(proc);
+			pr_err("%d:%d: bad work type %d\n",
+			       proc->pid, thread->pid, w->type);
+			break;
 		}
 
 		if (!t)

@@ -4467,6 +4502,8 @@ static int binder_thread_release(struct binder_proc *proc,
 		spin_lock(&t->lock);
 		if (t->to_thread == thread)
 			send_reply = t;
+	} else {
+		__acquire(&t->lock);
 	}
 	thread->is_dead = true;
 

@@ -4495,7 +4532,11 @@ static int binder_thread_release(struct binder_proc *proc,
 		spin_unlock(&last_t->lock);
 		if (t)
 			spin_lock(&t->lock);
+		else
+			__acquire(&t->lock);
 	}
+	/* annotation for sparse, lock not acquired in last iteration above */
+	__release(&t->lock);
 
 	/*
 	 * If this thread used poll, make sure we remove the waitqueue

index 030c98f35cca7..022cd80e80cc3 100644
@@ -939,6 +939,7 @@ enum lru_status binder_alloc_free_page(struct list_head *item,
 				       struct list_lru_one *lru,
 				       spinlock_t *lock,
 				       void *cb_arg)
+	__must_hold(lock)
 {
 	struct mm_struct *mm = NULL;
 	struct binder_lru_page *page = container_of(item,

index fb3238c74c8a8..c0aadbbf7f193 100644
@@ -30,16 +30,16 @@ struct binder_transaction;
  * struct binder_buffer - buffer used for binder transactions
  * @entry:              entry alloc->buffers
  * @rb_node:            node for allocated_buffers/free_buffers rb trees
- * @free:               true if buffer is free
- * @allow_user_free:    describe the second member of struct blah,
- * @async_transaction:  describe the second member of struct blah,
- * @debug_id:           describe the second member of struct blah,
- * @transaction:        describe the second member of struct blah,
- * @target_node:        describe the second member of struct blah,
- * @data_size:          describe the second member of struct blah,
- * @offsets_size:       describe the second member of struct blah,
- * @extra_buffers_size: describe the second member of struct blah,
- * @data:i              describe the second member of struct blah,
+ * @free:               %true if buffer is free
+ * @allow_user_free:    %true if user is allowed to free buffer
+ * @async_transaction:  %true if buffer is in use for an async txn
+ * @debug_id:           unique ID for debugging
+ * @transaction:        pointer to associated struct binder_transaction
+ * @target_node:        struct binder_node associated with this buffer
+ * @data_size:          size of @transaction data
+ * @offsets_size:       size of array of offsets
+ * @extra_buffers_size: size of space for other objects (like sg lists)
+ * @data:               pointer to base of buffer space
  *
  * Bookkeeping structure for binder transaction buffers
  */

index 172c207fbf99d..cbaef3b0d3078 100644
@@ -5440,6 +5440,9 @@ static void print_binder_proc(struct seq_file *m,
 	for (n = rb_first(&proc->nodes); n != NULL; n = rb_next(n)) {
 		struct binder_node *node = rb_entry(n, struct binder_node,
 						    rb_node);
+		if (!print_all && !node->has_async_transaction)
+			continue;
+
 		/*
 		 * take a temporary reference on the node so it
 		 * survives and isn't removed from the tree