How to open and write to a block driver within a character driver?

[Greg KH]

On Tue, Oct 04, 2011 at 10:42:15AM -0700, Yang Xiang wrote:
> I am taksed to develop a Block device driver which will be used within a
> character device driver so the write to the character driver will be also
> formatted, converted and duplicated to the block drvice.

Why?  That really makes no sense.  Please explain what type of problem
you are trying to solve with this design?

greg k-h