--- linux/kernel/traps.c	2018/04/24 18:01:31	1.1.1.2
+++ linux/kernel/traps.c	2018/04/24 18:03:12	1.1.1.3
@@ -36,8 +36,6 @@ register unsigned short __res; \
 __asm__("mov %%fs,%%ax":"=a" (__res):); \
 __res;})
 
-int do_exit(long code);
-
 void page_exception(void);
 
 void divide_error(void);
@@ -59,6 +57,7 @@ void coprocessor_error(void);
 void reserved(void);
 void parallel_interrupt(void);
 void irq13(void);
+void alignment_check(void);
 
 static void die(char * str,long esp_ptr,long nr)
 {
@@ -94,6 +93,11 @@ void do_general_protection(long esp, lon
 	die("general protection",esp,error_code);
 }
 
+void do_alignment_check(long esp, long error_code)
+{
+    die("alignment check",esp,error_code);
+}
+
 void do_divide_error(long esp, long error_code)
 {
 	die("divide error",esp,error_code);
@@ -199,7 +203,8 @@ void trap_init(void)
 	set_trap_gate(14,&page_fault);
 	set_trap_gate(15,&reserved);
 	set_trap_gate(16,&coprocessor_error);
-	for (i=17;i<48;i++)
+	set_trap_gate(17,&alignment_check);
+	for (i=18;i<48;i++)
 		set_trap_gate(i,&reserved);
 	set_trap_gate(45,&irq13);
 	outb_p(inb_p(0x21)&0xfb,0x21);