diff --git a/.gitignore b/.gitignore
index 2ecbcd97..cae77b40 100644
--- a/.gitignore
+++ b/.gitignore
@@ -12,6 +12,7 @@
 tags
 Makefile
 include/metalsvm/config.h
+include/metalsvm/config.inc
 tools/make_initrd
 newlib/examples/hello
 newlib/examples/jacobi
diff --git a/Makefile.example b/Makefile.example
index 1487bfb3..db58a6cc 100644
--- a/Makefile.example
+++ b/Makefile.example
@@ -113,8 +113,12 @@ veryclean: clean
 	@echo [DEP] $*.dep
 	$Q$(CPP_FOR_TARGET) -MF $*.dep -MT $*.o -MM -D__KERNEL__ $(CFLAGS) $<
 
+include/metalsvm/config.inc: include/metalsvm/config.h
+	@echo "; This file is generated automatically from the config.h file." > include/metalsvm/config.inc
+	@echo "; Before editing this, you should consider editing config.h." >> include/metalsvm/config.inc
+	@awk '/^#define MAX_CORES/{ print "%define MAX_CORES", $$3 }' include/metalsvm/config.h >> include/metalsvm/config.inc	
 
-%.o : %.asm
+%.o : %.asm include/metalsvm/config.inc
 	@echo [ASM] $@
 	$Q$(NASM) $(NASMFLAGS) -o $@ $<
 
diff --git a/arch/x86/kernel/entry.asm b/arch/x86/kernel/entry.asm
index f3c6a6d4..c9c0f4dc 100644
--- a/arch/x86/kernel/entry.asm
+++ b/arch/x86/kernel/entry.asm
@@ -799,15 +799,14 @@ common_switch:
     ; determine TSS
 %if MAX_CORES > 1
     call apic_cpu_id
+    mov ecx, DWORD 0x68
+    mul ecx
 %else
     xor eax, eax
 %endif
-    mov ecx, DWORD 0x68
-    mul ecx
     add eax, task_state_segments
-    add eax, DWORD 4 
     ; set esp0 in TSS
-    mov [eax], esp
+    mov [eax+4], esp
 
     ; call cleanup code
     call finish_task_switch
diff --git a/include/metalsvm/config.inc.example b/include/metalsvm/config.inc.example
deleted file mode 100644
index 2b919abc..00000000
--- a/include/metalsvm/config.inc.example
+++ /dev/null
@@ -1,4 +0,0 @@
-; config macros for the assembler code
-
-; define the maximum number of core
-%define MAX_CORES	1
diff --git a/kernel/tasks.c b/kernel/tasks.c
index 2dfb2d25..d283e55d 100644
--- a/kernel/tasks.c
+++ b/kernel/tasks.c
@@ -190,7 +190,7 @@ static void NORETURN do_exit(int arg) {
 
 	//remove fildes_table
 	if(!curr_task->fildes_table)
-		kfree(curr_task->fildes_table, sizeof(fildes_t)*NR_OPEN);
+		kfree(curr_task->fildes_table, sizeof(filp_t)*NR_OPEN);
 
 	spinlock_unlock(&curr_task->vma_lock);