raid support

[Werner Reisberger <werner@pure.ch>]

I am trying to build a kernel 2.2.17 with raid support. I thought the raid
support is already in the kernel but that seems not to work. 

The latest available raid kernel patch is for 2.2.11 (kernel.org) or
2.2.10 (debian package).

I applied patch 2.2.11 to the kernel sources but compilation failed:

  md.c:96: `DEV_MD_SPEED_LIMIT' undeclared here (not in a function)
  md.c:96: initializer element is not constant
  md.c:96: (near initialization for `md_table[0].ctl_name')
  md.c:102: `DEV_MD' undeclared here (not in a function)
  ...

Unfortunately the address for the raid mailing list 
(majordomo@vger.rutgers.edu) isn't valid anymore. 

Any hints appreciated.

 Werner