build: add a "user" arch to allow the kernel to run as a program on the host machine

arch/user/hwlock.c

@@ -0,0 +1,27 @@
+#include <socks/machine/hwlock.h>
+#include <socks/compiler.h>
+
+void ml_hwlock_lock(ml_hwlock_t *lck)
+{
+	volatile int q = 0;
+	while (!__sync_bool_compare_and_swap(lck, 0, 1)) {
+		q++;
+	}
+}
+
+void ml_hwlock_unlock(ml_hwlock_t *lck)
+{
+	__sync_lock_release(lck);
+}
+
+void ml_hwlock_lock_irqsave(ml_hwlock_t *lck, unsigned long *flags)
+{
+	(void)flags;
+	ml_hwlock_lock(lck);
+}
+
+void ml_hwlock_unlock_irqrestore(ml_hwlock_t *lck, unsigned long flags)
+{
+	(void)flags;
+	ml_hwlock_unlock(lck);
+}