kernel/general: Misc bug fixes

Author: Qwinci

src/mem/vmem.hpp

@@ -27,14 +27,14 @@ class VMem {
 			Span
 		} type {};
 	};
-	DoubleList<Segment, &Segment::list_hook> freelists[FREELIST_COUNT];
-	DoubleList<Segment, &Segment::seg_list_hook> seg_list;
-	DoubleList<Segment, &Segment::list_hook> hash_tab[HASHTAB_COUNT];
-	Segment* free_segs;
-	Segment* seg_page_list;
-	usize _base;
-	usize _size;
-	usize _quantum;
+	DoubleList<Segment, &Segment::list_hook> freelists[FREELIST_COUNT] {};
+	DoubleList<Segment, &Segment::seg_list_hook> seg_list {};
+	DoubleList<Segment, &Segment::list_hook> hash_tab[HASHTAB_COUNT] {};
+	Segment* free_segs {};
+	Segment* seg_page_list {};
+	usize _base {};
+	usize _size {};
+	usize _quantum {};
 	Spinlock<void> lock {};
 
 	Segment* seg_alloc();

src/sched/sched.cpp

@@ -182,7 +182,7 @@ void Scheduler::queue(Thread* thread) {
 
 void Scheduler::update_schedule() {
 	IrqGuard irq_guard {};
-	if (current->status == Thread::Status::Running) {
+	if (current->status == Thread::Status::Running && current != &current->cpu->idle_thread) {
 		if (us_to_next_schedule > current_irq_period) {
 			us_to_next_schedule -= current_irq_period;
 			prev = current;