diff --git a/os_dep/osdep_service.c b/os_dep/osdep_service.c
index e73a546..6b863f7 100644
--- a/os_dep/osdep_service.c
+++ b/os_dep/osdep_service.c
@@ -2101,200 +2101,6 @@ inline bool ATOMIC_INC_UNLESS(ATOMIC_T *v, int u)
 #endif
 }
 
-#ifdef PLATFORM_LINUX
-/*
-* Open a file with the specific @param path, @param flag, @param mode
-* @param fpp the pointer of struct file pointer to get struct file pointer while file opening is success
-* @param path the path of the file to open
-* @param flag file operation flags, please refer to linux document
-* @param mode please refer to linux document
-* @return Linux specific error code
-*/
-static int openFile(struct file **fpp, const char *path, int flag, int mode)
-{
-	struct file *fp;
-
-	fp = filp_open(path, flag, mode);
-	if (IS_ERR(fp)) {
-		*fpp = NULL;
-		return PTR_ERR(fp);
-	} else {
-		*fpp = fp;
-		return 0;
-	}
-}
-
-/*
-* Close the file with the specific @param fp
-* @param fp the pointer of struct file to close
-* @return always 0
-*/
-static int closeFile(struct file *fp)
-{
-	filp_close(fp, NULL);
-	return 0;
-}
-
-static int readFile(struct file *fp, char *buf, int len)
-{
-	int rlen = 0, sum = 0;
-
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 1, 0))
-	if (!(fp->f_mode & FMODE_CAN_READ))
-#else
-	if (!fp->f_op || !fp->f_op->read)
-#endif
-		return -EPERM;
-
-	while (sum < len) {
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 14, 0))
-		rlen = kernel_read(fp, buf + sum, len - sum, &fp->f_pos);
-#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 1, 0))
-		rlen = __vfs_read(fp, buf + sum, len - sum, &fp->f_pos);
-#else
-		rlen = fp->f_op->read(fp, buf + sum, len - sum, &fp->f_pos);
-#endif
-		if (rlen > 0)
-			sum += rlen;
-		else if (0 != rlen)
-			return rlen;
-		else
-			break;
-	}
-
-	return  sum;
-
-}
-
-static int writeFile(struct file *fp, char *buf, int len)
-{
-	int wlen = 0, sum = 0;
-
-	if (!fp->f_op || !fp->f_op->write)
-		return -EPERM;
-
-	while (sum < len) {
-		wlen = fp->f_op->write(fp, buf + sum, len - sum, &fp->f_pos);
-		if (wlen > 0)
-			sum += wlen;
-		else if (0 != wlen)
-			return wlen;
-		else
-			break;
-	}
-
-	return sum;
-
-}
-
-/*
-* Test if the specifi @param path is a file and readable
-* If readable, @param sz is got
-* @param path the path of the file to test
-* @return Linux specific error code
-*/
-static int isFileReadable(const char *path, u32 *sz)
-{
-	struct file *fp;
-	int ret = 0;
-	mm_segment_t oldfs;
-	char buf;
-
-	fp = filp_open(path, O_RDONLY, 0);
-	if (IS_ERR(fp))
-		ret = PTR_ERR(fp);
-	else {
-		oldfs = get_fs();
-		set_fs(get_ds());
-
-		if (1 != readFile(fp, &buf, 1))
-			ret = PTR_ERR(fp);
-
-		if (ret == 0 && sz) {
-			#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 19, 0))
-			*sz = i_size_read(fp->f_path.dentry->d_inode);
-			#else
-			*sz = i_size_read(fp->f_dentry->d_inode);
-			#endif
-		}
-
-		set_fs(oldfs);
-		filp_close(fp, NULL);
-	}
-	return ret;
-}
-
-/*
-* Open the file with @param path and retrive the file content into memory starting from @param buf for @param sz at most
-* @param path the path of the file to open and read
-* @param buf the starting address of the buffer to store file content
-* @param sz how many bytes to read at most
-* @return the byte we've read, or Linux specific error code
-*/
-static int retriveFromFile(const char *path, u8 *buf, u32 sz)
-{
-	int ret = -1;
-	mm_segment_t oldfs;
-	struct file *fp;
-
-	if (path && buf) {
-		ret = openFile(&fp, path, O_RDONLY, 0);
-		if (0 == ret) {
-			RTW_INFO("%s openFile path:%s fp=%p\n", __FUNCTION__, path , fp);
-
-			oldfs = get_fs();
-			set_fs(get_ds());
-			ret = readFile(fp, buf, sz);
-			set_fs(oldfs);
-			closeFile(fp);
-
-			RTW_INFO("%s readFile, ret:%d\n", __FUNCTION__, ret);
-
-		} else
-			RTW_INFO("%s openFile path:%s Fail, ret:%d\n", __FUNCTION__, path, ret);
-	} else {
-		RTW_INFO("%s NULL pointer\n", __FUNCTION__);
-		ret =  -EINVAL;
-	}
-	return ret;
-}
-
-/*
-* Open the file with @param path and wirte @param sz byte of data starting from @param buf into the file
-* @param path the path of the file to open and write
-* @param buf the starting address of the data to write into file
-* @param sz how many bytes to write at most
-* @return the byte we've written, or Linux specific error code
-*/
-static int storeToFile(const char *path, u8 *buf, u32 sz)
-{
-	int ret = 0;
-	mm_segment_t oldfs;
-	struct file *fp;
-
-	if (path && buf) {
-		ret = openFile(&fp, path, O_CREAT | O_WRONLY, 0666);
-		if (0 == ret) {
-			RTW_INFO("%s openFile path:%s fp=%p\n", __FUNCTION__, path , fp);
-
-			oldfs = get_fs();
-			set_fs(get_ds());
-			ret = writeFile(fp, buf, sz);
-			set_fs(oldfs);
-			closeFile(fp);
-
-			RTW_INFO("%s writeFile, ret:%d\n", __FUNCTION__, ret);
-
-		} else
-			RTW_INFO("%s openFile path:%s Fail, ret:%d\n", __FUNCTION__, path, ret);
-	} else {
-		RTW_INFO("%s NULL pointer\n", __FUNCTION__);
-		ret =  -EINVAL;
-	}
-	return ret;
-}
-#endif /* PLATFORM_LINUX */
-
 /*
 * Test if the specifi @param path is a file and readable
 * @param path the path of the file to test
@@ -2314,15 +2120,8 @@ int rtw_is_file_readable(const char *path)
 */
 int rtw_is_file_readable_with_size(const char *path, u32 *sz)
 {
-#ifdef PLATFORM_LINUX
-	if (isFileReadable(path, sz) == 0)
-		return _TRUE;
-	else
-		return _FALSE;
-#else
 	/* Todo... */
 	return _FALSE;
-#endif
 }
 
 /*