diff --git a/linux/kernel/system_call.s b/linux/kernel/system_call.s
index d26f913..b0a7e70 100644
--- a/linux/kernel/system_call.s
+++ b/linux/kernel/system_call.s
@@ -227,9 +227,8 @@ sys_fork:
 	pushl %edi
 	pushl %ebp
 	pushl %eax
-	pushl $0x0			#for flag
 	call copy_process
-	addl $24,%esp		#for flag
+	addl $20,%esp		
 1:	ret
 
 .align 4
@@ -237,17 +236,13 @@ sys_clone:
 	call find_empty_process
 	testl %eax,%eax
 	js 1f
-	pushl %eax
 	push %gs
 	pushl %esi
 	pushl %edi
 	pushl %ebp
 	pushl %eax
-	pushl $0x1			#for flag
-	call copy_process
-	addl $24,%esp		#for flag
-	call do_clone
-	addl $4,%esp
+	call copy_process_clone
+	addl $20,%esp
 1:	ret
 
 hd_interrupt: