Hi, all. In the MTD driver for nor flash, we should define a 'map_info' struct. But what is the use of map_info->read/write ? What is the difference between map_info->read/write and mtd_info->read/write ? I think the fs layer should call mtd_info->read/write, but not map_info->read/write. Who is the caller of map_info->read/write? Thanks! liu yang