diff --git a/components/dfs/filesystems/devfs/devfs.c b/components/dfs/filesystems/devfs/devfs.c
index 45195f3c2917b3c7575608703295299b71ea9d5b..f5d469fd5f0da2029e5193bcce1e96804c919782 100644
--- a/components/dfs/filesystems/devfs/devfs.c
+++ b/components/dfs/filesystems/devfs/devfs.c
@@ -4,10 +4,6 @@
 
 #include "devfs.h"
 
-/* introduce from kservice.c */
-#define rt_list_entry(node, type, member) \
-    ((type *)((char *)(node) - (unsigned long)(&((type *)0)->member)))
-
 struct device_dirent
 {
 	rt_device_t *devices;
@@ -15,12 +11,12 @@ struct device_dirent
 	rt_uint16_t device_count;
 };
 
-int dfs_device_fs_mount(struct dfs_filesystem* fs, unsigned long rwflag, const void* data)
+int dfs_device_fs_mount(struct dfs_filesystem *fs, unsigned long rwflag, const void *data)
 {
 	return DFS_STATUS_OK;
 }
 
-int dfs_device_fs_ioctl(struct dfs_fd* file, int cmd, void* args)
+int dfs_device_fs_ioctl(struct dfs_fd *file, int cmd, void *args)
 {
 	rt_err_t result;
 	rt_device_t dev_id;
@@ -39,7 +35,7 @@ int dfs_device_fs_ioctl(struct dfs_fd* file, int cmd, void* args)
 	return -DFS_STATUS_EIO;
 }
 
-int dfs_device_fs_read(struct dfs_fd* file, void *buf, rt_size_t count)
+int dfs_device_fs_read(struct dfs_fd *file, void *buf, rt_size_t count)
 {
 	int result;
 	rt_device_t dev_id;
@@ -57,7 +53,7 @@ int dfs_device_fs_read(struct dfs_fd* file, void *buf, rt_size_t count)
 	return result;
 }
 
-int dfs_device_fs_write(struct dfs_fd* file, const void *buf, rt_size_t count)
+int dfs_device_fs_write(struct dfs_fd *file, const void *buf, rt_size_t count)
 {
 	int result;
 	rt_device_t dev_id;
@@ -75,7 +71,7 @@ int dfs_device_fs_write(struct dfs_fd* file, const void *buf, rt_size_t count)
 	return result;
 }
 
-int dfs_device_fs_close(struct dfs_fd* file)
+int dfs_device_fs_close(struct dfs_fd *file)
 {
 	rt_err_t result;
 	rt_device_t dev_id;
@@ -86,7 +82,7 @@ int dfs_device_fs_close(struct dfs_fd* file)
 	{
 		struct device_dirent *root_dirent;
 
-		root_dirent = (struct device_dirent*)file->data;
+		root_dirent = (struct device_dirent *)file->data;
 		RT_ASSERT(root_dirent != RT_NULL);
 		
 		/* release dirent */
@@ -103,26 +99,28 @@ int dfs_device_fs_close(struct dfs_fd* file)
 	if (result == RT_EOK)
 	{
 		file->data = RT_NULL;
+
 		return DFS_STATUS_OK;
 	}
 
 	return -DFS_STATUS_EIO;
 }
 
-int dfs_device_fs_open(struct dfs_fd* file)
+int dfs_device_fs_open(struct dfs_fd *file)
 {
 	rt_device_t device;
 
-	if (file->flags & DFS_O_CREAT) return -DFS_STATUS_EINVAL;
+	if (file->flags & DFS_O_CREAT)
+		return -DFS_STATUS_EINVAL;
 
 	/* open root directory */
 	if ((file->path[0] == '/') && (file->path[1] == '\0') &&
 		(file->flags & DFS_O_DIRECTORY))
 	{
-		struct rt_object* object;
-		struct rt_list_node* node;
+		struct rt_object *object;
+		struct rt_list_node *node;
 		struct rt_object_information *information;
-		struct device_dirent* root_dirent;
+		struct device_dirent *root_dirent;
 		rt_uint32_t count = 0;
 		
 		extern struct rt_object_information rt_object_container[];
@@ -137,7 +135,7 @@ int dfs_device_fs_open(struct dfs_fd* file)
 			count ++;
 		}
 
-		root_dirent = (struct device_dirent*) rt_malloc (sizeof(struct device_dirent) + 
+		root_dirent = (struct device_dirent *)rt_malloc(sizeof(struct device_dirent) + 
 			count * sizeof(rt_device_t));
 		if (root_dirent != RT_NULL)
 		{
@@ -157,6 +155,7 @@ int dfs_device_fs_open(struct dfs_fd* file)
 
 		/* set data */
 		file->data = root_dirent;
+		
 		return DFS_STATUS_OK;
 	}
 
@@ -165,15 +164,16 @@ int dfs_device_fs_open(struct dfs_fd* file)
 		return -DFS_STATUS_ENODEV;
 
 	file->data = device;
+	
 	return DFS_STATUS_OK;
 }
 
-int dfs_device_fs_stat(struct dfs_filesystem* fs, const char *path, struct stat *st)
+int dfs_device_fs_stat(struct dfs_filesystem *fs, const char *path, struct stat *st)
 {
 	/* stat root directory */
 	if ((path[0] == '/') && (path[1] == '\0'))
 	{
-		st->st_dev   = 0;
+		st->st_dev = 0;
 
 		st->st_mode = DFS_S_IFREG | DFS_S_IRUSR | DFS_S_IRGRP | DFS_S_IROTH |
 			DFS_S_IWUSR | DFS_S_IWGRP | DFS_S_IWOTH;
@@ -183,6 +183,7 @@ int dfs_device_fs_stat(struct dfs_filesystem* fs, const char *path, struct stat
 		st->st_size  = 0;
 		st->st_mtime = 0;
 		st->st_blksize = 512;
+		
 		return DFS_STATUS_OK;
 	}
 	else
@@ -192,7 +193,7 @@ int dfs_device_fs_stat(struct dfs_filesystem* fs, const char *path, struct stat
 		dev_id = rt_device_find(&path[1]);
 		if (dev_id != RT_NULL)
 		{
-			st->st_dev   = 0;
+			st->st_dev = 0;
 
 			st->st_mode = DFS_S_IRUSR | DFS_S_IRGRP | DFS_S_IROTH |
 				DFS_S_IWUSR | DFS_S_IWGRP | DFS_S_IWOTH;
@@ -207,6 +208,7 @@ int dfs_device_fs_stat(struct dfs_filesystem* fs, const char *path, struct stat
 			st->st_size  = 0;
 			st->st_mtime = 0;
 			st->st_blksize = 512;
+			
 			return DFS_STATUS_OK;
 		}
 	}
@@ -214,19 +216,20 @@ int dfs_device_fs_stat(struct dfs_filesystem* fs, const char *path, struct stat
 	return -DFS_STATUS_ENOENT;
 }
 
-int dfs_device_fs_getdents(struct dfs_fd* file, struct dirent* dirp, rt_uint32_t count)
+int dfs_device_fs_getdents(struct dfs_fd *file, struct dirent *dirp, rt_uint32_t count)
 {
 	rt_uint32_t index;
 	rt_object_t object;
-	struct dirent* d;
+	struct dirent *d;
 	struct device_dirent *root_dirent;
 
-	root_dirent = (struct device_dirent*)file->data;
+	root_dirent = (struct device_dirent *)file->data;
 	RT_ASSERT(root_dirent != RT_NULL);
 
 	/* make integer count */
 	count = (count / sizeof(struct dirent));
-	if ( count == 0 ) return -DFS_STATUS_EINVAL;
+	if (count == 0)
+		return -DFS_STATUS_EINVAL;
 
 	for (index = 0; index < count && index + root_dirent->read_index < root_dirent->device_count; 
 		index ++)
@@ -269,8 +272,8 @@ static const struct dfs_filesystem_operation _device_fs =
 
 int devfs_init(void)
 {
-    /* register rom file system */
-    dfs_register(&_device_fs);
+	/* register rom file system */
+	dfs_register(&_device_fs);
 
 	return 0;
 }
diff --git a/components/net/lwip-1.3.2/src/arch/sys_arch_init.c b/components/net/lwip-1.3.2/src/arch/sys_arch_init.c
index ebb38898a24047d097f16ab98c9b1cfeafd4d8f6..0b4669afde7170ae59509a02f9e49bf000d98bc6 100644
--- a/components/net/lwip-1.3.2/src/arch/sys_arch_init.c
+++ b/components/net/lwip-1.3.2/src/arch/sys_arch_init.c
@@ -11,10 +11,6 @@
 #include "netif/ethernetif.h"
 #include "netif/etharp.h"
 
-/* introduce from kservice.c */
-#define rt_list_entry(node, type, member) \
-    ((type *)((char *)(node) - (unsigned long)(&((type *)0)->member)))
-
 static err_t netif_device_init(struct netif *netif)
 {
 	struct eth_device *ethif;
diff --git a/components/net/lwip/src/arch/sys_arch.c b/components/net/lwip/src/arch/sys_arch.c
index 21d4103a44957da5089bdaebd5f0a1fcbd730c46..1eb3c1cfeaa69f5933969e890721d9a4f7aa1894 100644
--- a/components/net/lwip/src/arch/sys_arch.c
+++ b/components/net/lwip/src/arch/sys_arch.c
@@ -12,10 +12,6 @@
 
 #include <string.h>
 
-/* introduce from kservice.c */
-#define rt_list_entry(node, type, member) \
-    ((type *)((char *)(node) - (unsigned long)(&((type *)0)->member)))
-
 static err_t netif_device_init(struct netif *netif)
 {
 	struct eth_device *ethif;