diff --git a/bsp/at91sam9260/applications/application.c b/bsp/at91sam9260/applications/application.c
index 1fd9324cd2123a9ef62c395aba8611a49d657c76..53d08e5ef6268d3a02700a9aeba22e60b5069853 100644
--- a/bsp/at91sam9260/applications/application.c
+++ b/bsp/at91sam9260/applications/application.c
@@ -31,8 +31,6 @@
 #include <rtdevice.h>
 
 #ifdef RT_USING_DFS
-/* dfs init */
-#include <dfs_init.h>
 /* dfs filesystem:ELM FatFs filesystem init */
 #include <dfs_elm.h>
 /* dfs Filesystem APIs */
diff --git a/bsp/beaglebone/applications/board.c b/bsp/beaglebone/applications/board.c
index 89c8c263ab5c719c44fd54dff5feb860cc7c02ba..7a7380c5f8ff53520ebcee81a8baf10da5ca2e55 100644
--- a/bsp/beaglebone/applications/board.c
+++ b/bsp/beaglebone/applications/board.c
@@ -14,6 +14,7 @@
 
 #include <rthw.h>
 #include <rtthread.h>
+#include <finsh.h>
 
 #include "board.h"
 #include <interrupt.h>
diff --git a/bsp/efm32/application.c b/bsp/efm32/application.c
index 781b1ab77eabb183d78be9cedd6bb53e762a7342..841ee48432c5ff2bd007e7d5836922bf601ff049 100644
--- a/bsp/efm32/application.c
+++ b/bsp/efm32/application.c
@@ -34,8 +34,6 @@
 #include <board.h>
 
 #if defined(RT_USING_DFS)
-/* dfs init */
-#include <dfs_init.h>
 /* dfs filesystem:ELM filesystem init */
 #include <dfs_elm.h>
 /* dfs Filesystem APIs */
diff --git a/bsp/frdm-k64f/applications/application.c b/bsp/frdm-k64f/applications/application.c
index f31581a9202a83d7226663e9e9de40f96ef7c278..0b2f9cda6ed0271d1f44ec8205f9fc61069a7573 100644
--- a/bsp/frdm-k64f/applications/application.c
+++ b/bsp/frdm-k64f/applications/application.c
@@ -17,6 +17,7 @@
  */
 /*@{*/
 
+#include <stdint.h>
 #include <stdio.h>
 
 #include "MK64F12.h"
@@ -25,12 +26,6 @@
 
 #include "led.h"
 
-#ifdef RT_USING_LWIP
-#include <lwip/sys.h>
-#include <lwip/api.h>
-#include <netif/ethernetif.h>
-#endif
-
 void rt_init_thread_entry(void* parameter)
 {
 #ifdef RT_USING_COMPONENTS_INIT
@@ -72,15 +67,9 @@ int rt_application_init()
 {
     rt_thread_t init_thread;
 
-#if (RT_THREAD_PRIORITY_MAX == 32)
     init_thread = rt_thread_create("init",
                                    rt_init_thread_entry, RT_NULL,
-                                   2048, 8, 20);
-#else
-    init_thread = rt_thread_create("init",
-                                   rt_init_thread_entry, RT_NULL,
-                                   2048, 80, 20);
-#endif
+                                   2048, RT_THREAD_PRIORITY_MAX/3, 20);
 
     if (init_thread != RT_NULL)
         rt_thread_startup(init_thread);
diff --git a/bsp/lm3s8962/applications/application.c b/bsp/lm3s8962/applications/application.c
index 28c13a22e026813b6383e671a75406b85ff46bee..25275ce3d0c6899b1748a7a89cdc6b890fd9b9c2 100644
--- a/bsp/lm3s8962/applications/application.c
+++ b/bsp/lm3s8962/applications/application.c
@@ -21,8 +21,6 @@
 #include <rtthread.h>
 
 #ifdef RT_USING_DFS
-/* dfs init */
-#include <dfs_init.h>
 /* dfs filesystem:ELM FatFs filesystem init */
 #include <dfs_elm.h>
 /* dfs Filesystem APIs */
diff --git a/bsp/lm3s8962/rtconfig.h b/bsp/lm3s8962/rtconfig.h
index ae7bd5f3d15a144ca784efe841c5c6035c4937e2..c3b3bc8369690b49a8e9272aaadebd64e86de60d 100644
--- a/bsp/lm3s8962/rtconfig.h
+++ b/bsp/lm3s8962/rtconfig.h
@@ -57,6 +57,7 @@
 /* SECTION: Device System */
 /* Using Device System*/
 #define RT_USING_DEVICE
+#define RT_USING_DEVICE_IPC
 
 #define RT_USING_UART1
 // #define RT_USING_UART2
diff --git a/bsp/lm3s9b9x/rtconfig.h b/bsp/lm3s9b9x/rtconfig.h
index 7a0185fc47d44bec7ead1f330b0fb1eaf21928e2..b6afc3072360d0c52ae831fa86ac07f0aa421d33 100644
--- a/bsp/lm3s9b9x/rtconfig.h
+++ b/bsp/lm3s9b9x/rtconfig.h
@@ -112,7 +112,7 @@
 #define RT_LWIP_ETH_PAD_SIZE 2
 
 /* Enable SNMP protocol*/
-#define RT_LWIP_SNMP
+//#define RT_LWIP_SNMP
 
 /* Using DHCP*/
 /* #define RT_LWIP_DHCP */
diff --git a/bsp/mini2440/applications/application.c b/bsp/mini2440/applications/application.c
index fe2626a827df3cb508e7b716b8c815faf1afecbf..89dbfb6b19d1a68439f252cb073296e9d1e70534 100644
--- a/bsp/mini2440/applications/application.c
+++ b/bsp/mini2440/applications/application.c
@@ -26,8 +26,6 @@
 #include "dm9000.h"
 
 #ifdef RT_USING_DFS
-/* dfs init */
-#include <dfs_init.h>
 /* dfs filesystem:ELM FatFs filesystem init */
 #include <dfs_elm.h>
 /* dfs Filesystem APIs */
diff --git a/bsp/mini2440/drivers/sdcard.c b/bsp/mini2440/drivers/sdcard.c
index 4d26676cd8d1c426cee1ad4ca9843659f2279442..7cb5bbe324a246d8716910b88c56b8ddc9b1a738 100644
--- a/bsp/mini2440/drivers/sdcard.c
+++ b/bsp/mini2440/drivers/sdcard.c
@@ -398,7 +398,7 @@ static rt_size_t rt_sdcard_read(rt_device_t dev,
 
     if (dev == RT_NULL)
     {
-        rt_set_errno(-DFS_STATUS_EINVAL);
+        rt_set_errno(-EINVAL);
 
         return 0;
     }
@@ -429,7 +429,7 @@ static rt_size_t rt_sdcard_write(rt_device_t dev,
 
     if (dev == RT_NULL)
     {
-        rt_set_errno(-DFS_STATUS_EINVAL);
+        rt_set_errno(-EINVAL);
 
         return 0;
     }
diff --git a/bsp/mini2440/rtconfig.h b/bsp/mini2440/rtconfig.h
index cbe7e4c99ba2699ece294e0d055404a82a7c1ede..32ee42c9088c1d65882c331caa1839747eb8f77b 100644
--- a/bsp/mini2440/rtconfig.h
+++ b/bsp/mini2440/rtconfig.h
@@ -64,6 +64,7 @@
 
 // <section name="RT_USING_DEVICE" description="Using Device Driver Framework" default="true" >
 #define RT_USING_DEVICE
+#define RT_USING_DEVICE_IPC
 // <bool name="RT_USING_UART0" description="Using UART0" default="true" />
 #define RT_USING_UART0
 // <integer name="RT_UART_RX_BUFFER_SIZE" description="The buffer size for UART reception" default="64" />
diff --git a/bsp/stm32f0x/drivers/led.c b/bsp/stm32f0x/drivers/led.c
index 15776cb457d7040676f6e3b08359c33cb653b55c..2a17a55adbcb110935841db1854be708ae69e8a8 100644
--- a/bsp/stm32f0x/drivers/led.c
+++ b/bsp/stm32f0x/drivers/led.c
@@ -12,6 +12,7 @@
  * 2013-11-15     bright       the first version
  */
 
+#include <rtthread.h>
 #include "led.h"
 
 /*
@@ -20,7 +21,7 @@ LED_RED  : PC9
 */
 
 /* Initial led gpio pin  */
-void rt_hw_led_init(void)
+int rt_hw_led_init(void)
 {
     GPIO_InitTypeDef  GPIO_InitStructure;
 
@@ -34,7 +35,8 @@ void rt_hw_led_init(void)
     GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
     GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
     GPIO_Init(GPIOC, &GPIO_InitStructure);
-}
 
+    return 0;
+}
 /* Initial components for device */
 INIT_DEVICE_EXPORT(rt_hw_led_init);
diff --git a/bsp/stm32f0x/drivers/led.h b/bsp/stm32f0x/drivers/led.h
index 15b7bb9676dd196e6178ea3b7b19dee150aa69df..af513637a27bbb2559643a69e144f591008664ad 100644
--- a/bsp/stm32f0x/drivers/led.h
+++ b/bsp/stm32f0x/drivers/led.h
@@ -15,13 +15,13 @@
 #ifndef __LED_H__
 #define __LED_H__
 
-#include <rthw.h>
 #include <rtthread.h>
 #include <stm32f0xx.h>
 
 #define rt_hw_led_on()   GPIO_SetBits(GPIOC, GPIO_Pin_9)
 #define rt_hw_led_off()  GPIO_ResetBits(GPIOC, GPIO_Pin_9)
 
-void rt_hw_led_init(void);
+int rt_hw_led_init(void);
 
 #endif
+
diff --git a/bsp/stm32f0x/rtconfig.h b/bsp/stm32f0x/rtconfig.h
index 03fa50ba3c6a385ebe3853720e024294d46c7115..bee200136a644c55c0c8f81aab3897a40a47f965 100644
--- a/bsp/stm32f0x/rtconfig.h
+++ b/bsp/stm32f0x/rtconfig.h
@@ -34,7 +34,7 @@
 #define RT_USING_SEMAPHORE
 
 /* Using Mutex */
-/* #define RT_USING_MUTEX */
+#define RT_USING_MUTEX
 
 /* Using Event */
 /* #define RT_USING_EVENT */
diff --git a/bsp/stm32f107/applications/application.c b/bsp/stm32f107/applications/application.c
index ef28641004f7d766acb4aa3ff36832e94aa8db2b..81c72e0cd54751d9db7c0f8643e9377ae060c7fe 100644
--- a/bsp/stm32f107/applications/application.c
+++ b/bsp/stm32f107/applications/application.c
@@ -22,7 +22,6 @@
 
 #ifdef RT_USING_DFS
 #include <dfs_fs.h>
-#include <dfs_init.h>
 #include <dfs_elm.h>
 #endif
 
diff --git a/components/drivers/serial/serial.c b/components/drivers/serial/serial.c
index 48b60caeaffcc8ff242f9ae598ed4b1baa3e676f..c279490dec63cb22f82c0409bb62bfee53bbaf7d 100644
--- a/components/drivers/serial/serial.c
+++ b/components/drivers/serial/serial.c
@@ -48,6 +48,7 @@
 #include <posix_termios.h>
 #endif
 
+#ifdef RT_USING_DFS
 #ifdef RT_USING_DFS_DEVFS
 #include <dfs_posix.h>
 
@@ -209,7 +210,7 @@ const static struct dfs_file_ops _serial_fops =
     serial_fops_poll,
 };
 #endif
-
+#endif
 /*
  * Serial poll routines
  */
diff --git a/components/drivers/src/pipe.c b/components/drivers/src/pipe.c
index b455870c8a6c042037e1b82476084d21f311a815..bc9ed5f9a2bfecc487d2db7784785f1fc85adf7d 100644
--- a/components/drivers/src/pipe.c
+++ b/components/drivers/src/pipe.c
@@ -23,8 +23,10 @@
  */
 #include <rthw.h>
 #include <rtdevice.h>
+#if defined(RT_USING_DFS)
 #include <dfs_file.h>
 #include <dfs_posix.h>
+#endif
 
 #if defined(RT_USING_DFS) && defined(RT_USING_DFS_DEVFS)
 static int pipe_open(struct dfs_fd *fd)
diff --git a/components/libc/compilers/minilibc/stdint.h b/components/libc/compilers/minilibc/stdint.h
index f397b57bc5deba0146c5bbca7b10a44045bb88c3..eaafb3d2a5b2e8c87d6965a6481baf2cf9086882 100644
--- a/components/libc/compilers/minilibc/stdint.h
+++ b/components/libc/compilers/minilibc/stdint.h
@@ -11,6 +11,8 @@ typedef	rt_int32_t		int32_t;
 typedef	rt_uint32_t		uint32_t;
 typedef long long		int64_t;
 typedef unsigned long long uint64_t;
+typedef signed long intptr_t;
+typedef unsigned long uintptr_t;
 
 /*
  * 7.18.2 Limits of specified-width integer types.
diff --git a/components/libc/compilers/minilibc/stdio.h b/components/libc/compilers/minilibc/stdio.h
index 160b4d2c781165fb3ea65827d1d0c7451c58786a..a6ecb329313a99fc660f74586eab71851d820b32 100644
--- a/components/libc/compilers/minilibc/stdio.h
+++ b/components/libc/compilers/minilibc/stdio.h
@@ -4,5 +4,15 @@
 #define BUFSIZ 128
 #define EOF 	(-1)
 
+#ifndef SEEK_SET
+#define	SEEK_SET	0	/* set file offset to offset */
+#endif
+#ifndef SEEK_CUR
+#define	SEEK_CUR	1	/* set file offset to current plus offset */
+#endif
+#ifndef SEEK_END
+#define	SEEK_END	2	/* set file offset to EOF plus offset */
+#endif
+
 #endif
 
diff --git a/components/net/SConscript b/components/net/SConscript
index bfb1cb9afde47869eb682b6d95cab762e2666b49..b930821bd8d57ecc62ca7f20b8a8db7a966a4235 100644
--- a/components/net/SConscript
+++ b/components/net/SConscript
@@ -7,8 +7,8 @@ objs = []
 cwd = GetCurrentDir()
 list = os.listdir(cwd)
 
-# the default version of LWIP is 1.4.1
-if not GetDepend('RT_USING_LWIP132') and not GetDepend('RT_USING_LWIP140') and not GetDepend('RT_USING_LWIP202'):
+# the default version of LWIP is 2.0.2
+if not GetDepend('RT_USING_LWIP132') and not GetDepend('RT_USING_LWIP141') and not GetDepend('RT_USING_LWIP202'):
     AddDepend('RT_USING_LWIP202')
 
 for d in list: