diff --git a/kernel/include/sys/select.h b/kernel/include/sys/select.h
index 28d7689c8a63a60f36dd09dc6f630ba468bbed49..8880e86f7b980e6436ba4b6fc1b3a04145768be6 100644
--- a/kernel/include/sys/select.h
+++ b/kernel/include/sys/select.h
@@ -15,9 +15,14 @@ extern "C" {
 
 #include <bits/alltypes.h>
 #include <signal.h>
+#ifdef LOSCFG_FS_VFS
 #include "vfs_config.h"
 
 /* FD_SETSIZE is defined in "vfs_config.h" */
+#else
+#define FD_SETSIZE 512
+#define FD_SET_TOTAL_SIZE FD_SETSIZE
+#endif
 
 typedef unsigned long fd_mask;
 
diff --git a/kernel/src/exit/exit.c b/kernel/src/exit/exit.c
index 4041b0068e0cc8a5a183bf0766de36f9ecd48a61..4fd2028ca943e193bd1f86e8fc9564227956ee7b 100644
--- a/kernel/src/exit/exit.c
+++ b/kernel/src/exit/exit.c
@@ -35,6 +35,7 @@
 void _exit(int status) {
   PRINT_ERR("%s NOT SUPPORT\n", __FUNCTION__);
   errno = ENOSYS;
+  while (1);
 }
 
 void exit(int status) {
diff --git a/kernel/src/stdio/__stdio_seek.c b/kernel/src/stdio/__stdio_seek.c
index 7dc17617942d802f18982b4b6ad7dc8a49108754..9e93feb0447bde655d12308c56e166b18c4da03c 100755
--- a/kernel/src/stdio/__stdio_seek.c
+++ b/kernel/src/stdio/__stdio_seek.c
@@ -2,6 +2,7 @@
 #include <unistd.h>
 #include <sys/types.h>
 #include <dirent.h>
+#ifdef LOSCFG_FS_VFS
 #include <fs/fs.h>
 
 static off64_t __stdio_lseek64(int fd, int offsetHigh, int offsetLow, off64_t *result, int whence)
@@ -53,3 +54,4 @@ off_t __stdio_seek(FILE *f, off_t off, int whence)
     off_t result = 0;
     return __stdio_lseek64(f->fd, off>>32, off, &result, whence) ? -1 : result;
 }
+#endif
diff --git a/kernel/src/stdio/fclose.c b/kernel/src/stdio/fclose.c
index b513a007f030cd4fb4ac42e24ef677ecb28f09c6..c53f3cd6e6b7fa621b684f64e70f464a75aec671 100644
--- a/kernel/src/stdio/fclose.c
+++ b/kernel/src/stdio/fclose.c
@@ -3,8 +3,6 @@
 #ifdef LOSCFG_LLTSER
 #include "gcov_ser.h"
 #endif
-#include "fs/fs.h"
-#include "fs/file.h"
 
 static void dummy(FILE *f) { }
 weak_alias(dummy, __unlist_locked_file);
diff --git a/kernel/src/stdio/fopen.c b/kernel/src/stdio/fopen.c
index adfc34fe71add0cc3b3d03de635322f7bfc046bd..37d91130f476b49d783b3fc4c21dc73bcb2f0190 100644
--- a/kernel/src/stdio/fopen.c
+++ b/kernel/src/stdio/fopen.c
@@ -7,8 +7,6 @@
 #ifdef LOSCFG_LLTSER
 #include "gcov_ser.h"
 #endif
-#include "fs/fs.h"
-#include "fs/file.h"
 
 FILE *fopen(const char *restrict filename, const char *restrict mode)
 {
diff --git a/kernel/src/stdio/fread.c b/kernel/src/stdio/fread.c
index 69e41fcc5982a9d758650d2364a7c5f834aba893..5d3b869ef9f918cde3a3e0a889151b46f78609a1 100644
--- a/kernel/src/stdio/fread.c
+++ b/kernel/src/stdio/fread.c
@@ -3,8 +3,6 @@
 #ifdef LOSCFG_LLTSER
 #include "gcov_ser.h"
 #endif
-#include "fs/fs.h"
-#include "fs/file.h"
 
 #define MIN(a,b) ((a)<(b) ? (a) : (b))
 
diff --git a/kernel/src/stdio/remove.c b/kernel/src/stdio/remove.c
index 1825fd171a79c85a85643f5b4975a64a04f30041..84549a560cc5fe2ec1360cd27597dbff2dd9d726 100644
--- a/kernel/src/stdio/remove.c
+++ b/kernel/src/stdio/remove.c
@@ -2,8 +2,6 @@
 #include <errno.h>
 #include <fcntl.h>
 #include <unistd.h>
-#include "fs/fs.h"
-#include "fs/file.h"
 
 int remove(const char *path)
 {
diff --git a/kernel/src/stdio/vfprintf.c b/kernel/src/stdio/vfprintf.c
index b721461f549ec4849f1e7140e8888ff62f0f6937..a5bcee8a14614a40ed51eb1f9ff00c250836ac9f 100644
--- a/kernel/src/stdio/vfprintf.c
+++ b/kernel/src/stdio/vfprintf.c
@@ -448,6 +448,7 @@ static int printf_core(FILE *f, const char *fmt, va_list *ap, union arg *nl_arg,
 	int t, pl;
 	wchar_t wc[2], *ws;
 	char mb[4];
+#ifdef LOSCFG_FS_VFS
 	struct winsize wsz;
 
 	if (f && (f->write == __stdout_write) && !ioctl(f->fd, TIOCGWINSZ, &wsz)) {
@@ -456,6 +457,7 @@ static int printf_core(FILE *f, const char *fmt, va_list *ap, union arg *nl_arg,
 		f->wpos = f->wbase = f->buf;
 		f->wend = f->buf + f->buf_size;
 	}
+#endif
 	for (;;) {
 		/* This error is only specified for snprintf, but since it's
 		 * unspecified for other forms, do the same. Stop immediately