diff --git a/linux/include/linux/sched.h b/linux/include/linux/sched.h
index ea9fd3d..ae8e8a8 100644
--- a/linux/include/linux/sched.h
+++ b/linux/include/linux/sched.h
@@ -113,9 +113,11 @@ struct mmap_struct
 	//映射区域以4096字节为单位  (endaddr-address)%4096=0 ，每个进程addr起始地址0x2000000 + n*0x1000
 	unsigned long address;
 	unsigned long endaddr; 
+	off_t off;
 	int rw;//
 	int ps;//private or shared
 	struct mmap_struct *next;
+	struct m_inode *filenode;
 	int size;
 };
 /*