ACPI: Set max_cstate to 1 for early Opterons.

AMD Opteron processors before CG revision don't like C-states > 1.

This solves the long standing bugzilla #5303 and probably some more
on affected machines:

  http://bugzilla.kernel.org/show_bug.cgi?id=5303

[ tglx@linutronix.de: reworked the patch so it does not wreck ia64 ]

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/asm-ia64/acpi.h b/include/asm-ia64/acpi.h
index 49730ffbbae4..81bcd5e51789 100644
--- a/include/asm-ia64/acpi.h
+++ b/include/asm-ia64/acpi.h
@@ -94,6 +94,7 @@ ia64_acpi_release_global_lock (unsigned int *lock)
 #define acpi_noirq 0    /* ACPI always enabled on IA64 */
 #define acpi_pci_disabled 0 /* ACPI PCI always enabled on IA64 */
 #define acpi_strict 1   /* no ACPI spec workarounds on IA64 */
+#define acpi_processor_cstate_check(x) (x) /* no idle limits on IA64 :) */
 static inline void disable_acpi(void) { }
 
 const char *acpi_get_sysname (void);