Merge git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86

* git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86:
  x86: fix APIC related bootup crash on Athlon XP CPUs
  time: add ADJ_OFFSET_SS_READ
  x86: export the symbol empty_zero_page on the 32-bit x86 architecture
  x86: fix kprobes_64.c inlining borkage
  pci: use pci=bfsort for HP DL385 G2, DL585 G2
  x86: correctly set UTS_MACHINE for "make ARCH=x86"
  lockdep: annotate do_debug() trap handler
  x86: turn off iommu merge by default
  x86: fix ACPI compile for LOCAL_APIC=n
  x86: printk kernel version in WARN_ON and other dump_stack users
  ACPI: Set max_cstate to 1 for early Opterons.
  x86: fix NMI watchdog & 'stopped time' problem

4 files changed, 30 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);
diff --git a/include/asm-x86/acpi.h b/include/asm-x86/acpi.h
index 0693689d4146..f8a89793ac8c 100644
--- a/include/asm-x86/acpi.h
+++ b/include/asm-x86/acpi.h
@@ -1,5 +1,32 @@
+#ifndef _ASM_X86_ACPI_H
+#define _ASM_X86_ACPI_H
+
 #ifdef CONFIG_X86_32
 # include "acpi_32.h"
 #else
 # include "acpi_64.h"
 #endif
+
+#include <asm/processor.h>
+
+/*
+ * Check if the CPU can handle C2 and deeper
+ */
+static inline unsigned int acpi_processor_cstate_check(unsigned int max_cstate)
+{
+        /*
+         * Early models (<=5) of AMD Opterons are not supposed to go into
+         * C2 state.
+         *
+         * Steppings 0x0A and later are good
+         */
+        if (boot_cpu_data.x86 == 0x0F &&
+            boot_cpu_data.x86_vendor == X86_VENDOR_AMD &&
+            boot_cpu_data.x86_model <= 0x05 &&
+            boot_cpu_data.x86_mask < 0x0A)
+                return 1;
+        else
+                return max_cstate;
+}
+
+#endif
diff --git a/include/asm-x86/apic_32.h b/include/asm-x86/apic_32.h
index 4091b33dcb10..be158b27d54b 100644
--- a/include/asm-x86/apic_32.h
+++ b/include/asm-x86/apic_32.h
@@ -120,6 +120,7 @@ extern int local_apic_timer_disabled;
 
 #else /* !CONFIG_X86_LOCAL_APIC */
 static inline void lapic_shutdown(void) { }
+#define local_apic_timer_c2_ok          1
 
 #endif /* !CONFIG_X86_LOCAL_APIC */
 
diff --git a/include/linux/timex.h b/include/linux/timex.h
index 37ac3ff90faf..24c6a2b59511 100644
--- a/include/linux/timex.h
+++ b/include/linux/timex.h
@@ -137,6 +137,7 @@ struct timex {
 #define ADJ_TIMECONST           0x0020  /* pll time constant */
 #define ADJ_TICK                0x4000  /* tick value */
 #define ADJ_OFFSET_SINGLESHOT   0x8001  /* old-fashioned adjtime */
+#define ADJ_OFFSET_SS_READ      0xa001  /* read-only adjtime */
 
 /* xntp 3.4 compatibility names */
 #define MOD_OFFSET      ADJ_OFFSET