Hi,

    compilation of cris serial driver on 2.6.30-rc1 is broken since 
commit number 0f043a81ebe84be3576667f04fdda481609e3816 removed the 
read_proc field from the tty_driver structure.

The patch in attachment may fix the problem. Please check it very 
carefully: I don't have hardware to make any test.

Regards,

           Claudio