[ACPI-sppt] Enable HyperThreading, get "Too big length in RSDT"

Hi,

I'm trying to get HT working on a system here.

2.4.22 kernel.org kernel, compiled with GCC 3.2.2,

  CONFIG_MPENTIUM4=y
  CONFIG_SMP=y
  CONFIG_ACPI=y
  CONFIG_ACPI_HT_ONLY=y

System is HP xw4100, P4/800FSB,

  $ cat /proc/cpuinfo 
  processor       : 0
  vendor_id       : GenuineIntel
  cpu family      : 15
  model           : 2
  model name      : Intel(R) Pentium(R) 4 CPU 3.00GHz
  stepping        : 9
  cpu MHz         : 2992.566
  cache size      : 512 KB
  ...
  flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
  mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm
                                                           ^^
  bogomips        : 5976.88

I enabled HyperThreading in the BIOS.

Now, at boot time, I get,

  Aug 27 13:11:39 daisy kernel: Linux version 2.4.22 (root@daisy) (gcc 
  version 3.2.2 20030222 (Red Hat Linux 3.2.2-5)) #4 SMP Wed Aug 27 
  12:52:50 EDT 2003
  ...
  Aug 27 13:11:39 daisy kernel: ACPI: RSDP located at physical address
  c00ea410
  Aug 27 13:11:39 daisy kernel: RSD PTR  v0 [COMPAQ]
  Aug 27 13:11:39 daisy kernel: ACPI table found: RSDT v1 [COMPAQ CPQ0063
  8195.1298]
  Aug 27 13:11:39 daisy kernel: ACPI: Too big length in RSDT: 124
  ...
  Aug 27 13:11:39 daisy kernel: Error: only one processor found.
  Aug 27 13:11:39 daisy kernel: WARNING: No sibling found for CPU 0.


The "Too big" error is coming from arch/i386/kernel/acpitable.c.

Adding up the size of "struct acpi_table_rsdt" from acpitable.h,
it looks to be 104 bytes, so 124 is too big, as reported.

Anything I can do about this?

-Jamie



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