关于lfs_init断言失败问题

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1. 断言失败代码：
   // check that block size is a multiple of cache size is a multiple // of prog and read sizes LFS_ASSERT(lfs->cfg->cache_size % lfs->cfg->read_size == 0); LFS_ASSERT(lfs->cfg->cache_size % lfs->cfg->prog_size == 0); LFS_ASSERT(lfs->cfg->block_size % lfs->cfg->cache_size == 0);

2. 打印提示如下：
   *** assertion failed: lfs->cfg->cache_size % lfs->cfg->read_size == 0, file packages\littlefs-latest\lfs.c, line 4184
   SIGABRT: Abnormal termination
   

3. 跟踪问题发现：
   执行static int DFS_LFS_MKFS(rt_device_t dev_id, const char *fs_name)函数中的result = lfs_format(&dfs_lfs->lfs, &dfs_lfs->cfg);代码时，dfs_lfs->cfg和进入lfs_format函数之后的cfg数据不一致，具体说应该是数据出现偏移
   

4. 解决方案：
   将lfs.h头文件struct lfs_config结构体中的如下代码，放到结构体最后
   `#ifdef LFS_THREADSAFE
   // Lock the underlying block device. Negative error codes
   // are propagated to the user.
   int (*lock)(const struct lfs_config *c);

   // Unlock the underlying block device. Negative error codes
   // are propagated to the user.
   int (*unlock)(const struct lfs_config *c);
   #endif`