kern/97624: enable SATA RAID on ASUS N4L-VM DH (ICH7M-DH)

[Yoichi Nakayama]

I met problem on booting when SATA RAID1 Volume is in
Status:Degraded (after disconnecting one disk in the array).
The patched kernel based on SMP/GENERIC both panic as:

6.1R GENERIC kernel (patched):
  Fatal trap 12: page fault while in kernel mode
  fault virtual address   = 0xf4c3b8d8
  fault code              = supervisor read, page not present
  instruction pointer     = 0x20:0xc083fa56
  stack pointer           = 0x28:0xc0c20bfc
  frame pointer           = 0x28:0xc0c20c40
  code segment            = base 0x0, limit 0xfffff, type 0x1b
                          = DPL 0, pres 1, def32 1, gran 1
  processor eflags        = interrupt enabled, resume, IOPL = 0
  current process         = 0 (swapper)
  trap number             = 12
  panic: page fault

6.1R SMP kernel (patched):
  Fatal trap 12: page fault while in kernel mode
  fault virtual address   = 0xf4d988d8
  fault code              = supervisor read, page not present
  instruction pointer     = 0x20:0xc0847e06
  stack pointer           = 0x28:0xc0c20bfc
  frame pointer           = 0x28:0xc0c20c40
  code segment            = base 0x0, limit 0xfffff, type 0x1b
                          = DPL 0, pres 1, def32 1, gran 1
  processor eflags        = interrupt enabled, resume, IOPL = 0
  current process         = 0 (swapper)
  trap number             = 12
  panic: page fault

If I "Reset Disks to Non-RAID" then "Create RAID Volume" with
Intel(R) Matrix Storage Managaer, the panic disappears.

Original 6.1R GENERIC kernel doesn't get panic nor recognize
SATA disks.

Motherboard: ASUS N4L-VM DH (ICH7M-DH)
CPU: Intel Core Duo T2300

Is the problem general (known?) problem or special to this
controller?

Regards,
-- 
Yoichi NAKAYAMA