PMM and liballoc port

kernel/sync/spin_lock.h

@@ -0,0 +1,13 @@
+#ifndef _KERNEL_SYNC_SPIN_LOCK_H
+#define _KERNEL_SYNC_SPIN_LOCK_H
+
+#include <libk/std.h>
+
+#define SPIN_LOCK_INIT  ATOMIC_FLAG_INIT
+
+typedef atomic_flag spin_lock_t;
+
+void spin_lock(spin_lock_t *sl);
+void spin_unlock(spin_lock_t *sl);
+
+#endif // _KERNEL_SYNC_SPIN_LOCK_H