Kernel: Generally improve signals

kernel/kernel/Scheduler.cpp

@@ -86,7 +86,6 @@ namespace Kernel
 
 	void Scheduler::reschedule()
 	{
-		VERIFY_STI();
 		DISABLE_INTERRUPTS();
 
 		if (save_current_thread())
@@ -247,7 +246,7 @@ namespace Kernel
 				current->set_started();
 				start_thread(current->rsp(), current->rip());
 			case Thread::State::Executing:
-				while (current->has_signal_to_execute() && current->state() == Thread::State::Executing)
+				while (current->has_signal_to_execute())
 					current->handle_signal();
 				// fall through
 			case Thread::State::Terminating: