Add function "tss_flush"

arch/Makefile

@@ -18,7 +18,7 @@ OBJS += kprintf.c.o
 
 OBJS += protected.c.o protected.asm.cpp.o
 
-OBJS += tss.c.o
+OBJS += tss.c.o tss.asm.cpp.o
 
 OBJS += interrupt.asm.cpp.o
 

arch/tss.asm

@@ -0,0 +1,8 @@
+#include "config.h"
+
+[GLOBAL tss_flush]
+
+tss_flush:
+    mov ax, GDT_TSS_SELECTOR
+    ltr ax
+    ret

arch/tss.h

@@ -5,4 +5,6 @@
 
 void tss_write_to_gdt(const struct KernelMQ_Info *kinfo, void *gdt_entry);
 
+void tss_flush();
+
 #endif