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

15 files changed, 91 insertions, 10 deletions

diff --git a/arch/x86/kernel/apic_32.c b/arch/x86/kernel/apic_32.c
index 08b07c17696..96986b46bc8 100644
--- a/arch/x86/kernel/apic_32.c
+++ b/arch/x86/kernel/apic_32.c
@@ -789,7 +789,7 @@ void __init sync_Arb_IDs(void)
          * Unsupported on P4 - see Intel Dev. Manual Vol. 3, Ch. 8.6.1 And not
          * needed on AMD.
          */
-        if (modern_apic())
+        if (modern_apic() || boot_cpu_data.x86_vendor == X86_VENDOR_AMD)
                 return;
         /*
          * Wait for idle.
diff --git a/arch/x86/kernel/i386_ksyms_32.c b/arch/x86/kernel/i386_ksyms_32.c
index edd39ccf139..02112fcc0de 100644
--- a/arch/x86/kernel/i386_ksyms_32.c
+++ b/arch/x86/kernel/i386_ksyms_32.c
@@ -2,6 +2,7 @@
 #include <asm/semaphore.h>
 #include <asm/checksum.h>
 #include <asm/desc.h>
+#include <asm/pgtable.h>
 
 EXPORT_SYMBOL(__down_failed);
 EXPORT_SYMBOL(__down_failed_interruptible);
@@ -29,3 +30,4 @@ EXPORT_SYMBOL(__read_lock_failed);
 #endif
 
 EXPORT_SYMBOL(csum_partial);
+EXPORT_SYMBOL(empty_zero_page);
diff --git a/arch/x86/kernel/io_apic_32.c b/arch/x86/kernel/io_apic_32.c
index 6bb80ea5f4e..6cf27319a91 100644
--- a/arch/x86/kernel/io_apic_32.c
+++ b/arch/x86/kernel/io_apic_32.c
@@ -2166,6 +2166,10 @@ static inline void __init check_timer(void)
 {
         int apic1, pin1, apic2, pin2;
         int vector;
+        unsigned int ver;
+
+        ver = apic_read(APIC_LVR);
+        ver = GET_APIC_VERSION(ver);
 
         /*
          * get/set the timer IRQ vector:
@@ -2179,11 +2183,15 @@ static inline void __init check_timer(void)
          * mode for the 8259A whenever interrupts are routed
          * through I/O APICs.  Also IRQ0 has to be enabled in
          * the 8259A which implies the virtual wire has to be
-         * disabled in the local APIC.
+         * disabled in the local APIC.  Finally timer interrupts
+         * need to be acknowledged manually in the 8259A for
+         * timer_interrupt() and for the i82489DX when using
+         * the NMI watchdog.
          */
         apic_write_around(APIC_LVT0, APIC_LVT_MASKED | APIC_DM_EXTINT);
         init_8259A(1);
-        timer_ack = 1;
+        timer_ack = !cpu_has_tsc;
+        timer_ack |= (nmi_watchdog == NMI_IO_APIC && !APIC_INTEGRATED(ver));
         if (timer_over_8254 > 0)
                 enable_8259A_irq(0);
 
diff --git a/arch/x86/kernel/kprobes_64.c b/arch/x86/kernel/kprobes_64.c
index 3db3611933d..0c467644589 100644
--- a/arch/x86/kernel/kprobes_64.c
+++ b/arch/x86/kernel/kprobes_64.c
@@ -58,7 +58,7 @@ const int kretprobe_blacklist_size = ARRAY_SIZE(kretprobe_blacklist);
 /*
  * returns non-zero if opcode modifies the interrupt flag.
  */
-static __always_inline int is_IF_modifier(kprobe_opcode_t *insn)
+static int __kprobes is_IF_modifier(kprobe_opcode_t *insn)
 {
         switch (*insn) {
         case 0xfa:              /* cli */
diff --git a/arch/x86/kernel/nmi_32.c b/arch/x86/kernel/nmi_32.c
index 600fd404e44..f5cc47c60b1 100644
--- a/arch/x86/kernel/nmi_32.c
+++ b/arch/x86/kernel/nmi_32.c
@@ -25,6 +25,7 @@
 
 #include <asm/smp.h>
 #include <asm/nmi.h>
+#include <asm/timer.h>
 
 #include "mach_traps.h"
 
@@ -83,7 +84,7 @@ static int __init check_nmi_watchdog(void)
 
         prev_nmi_count = kmalloc(NR_CPUS * sizeof(int), GFP_KERNEL);
         if (!prev_nmi_count)
-                return -1;
+                goto error;
 
         printk(KERN_INFO "Testing NMI watchdog ... ");
 
@@ -117,7 +118,7 @@ static int __init check_nmi_watchdog(void)
         if (!atomic_read(&nmi_active)) {
                 kfree(prev_nmi_count);
                 atomic_set(&nmi_active, -1);
-                return -1;
+                goto error;
         }
         printk("OK.\n");
 
@@ -128,6 +129,10 @@ static int __init check_nmi_watchdog(void)
 
         kfree(prev_nmi_count);
         return 0;
+error:
+        timer_ack = !cpu_has_tsc;
+
+        return -1;
 }
 /* This needs to happen later in boot so counters are working */
 late_initcall(check_nmi_watchdog);
diff --git a/arch/x86/kernel/pci-dma_64.c b/arch/x86/kernel/pci-dma_64.c
index aa805b11b24..5552d23d23c 100644
--- a/arch/x86/kernel/pci-dma_64.c
+++ b/arch/x86/kernel/pci-dma_64.c
@@ -12,7 +12,7 @@
 #include <asm/gart.h>
 #include <asm/calgary.h>
 
-int iommu_merge __read_mostly = 1;
+int iommu_merge __read_mostly = 0;
 EXPORT_SYMBOL(iommu_merge);
 
 dma_addr_t bad_dma_address __read_mostly;
diff --git a/arch/x86/kernel/traps_32.c b/arch/x86/kernel/traps_32.c
index 298d13ed3ab..ef601026259 100644
--- a/arch/x86/kernel/traps_32.c
+++ b/arch/x86/kernel/traps_32.c
@@ -283,6 +283,11 @@ void dump_stack(void)
 {
         unsigned long stack;
 
+        printk("Pid: %d, comm: %.20s %s %s %.*s\n",
+                current->pid, current->comm, print_tainted(),
+                init_utsname()->release,
+                (int)strcspn(init_utsname()->version, " "),
+                init_utsname()->version);
         show_trace(current, NULL, &stack);
 }
 
@@ -828,6 +833,8 @@ fastcall void __kprobes do_debug(struct pt_regs * regs, long error_code)
         unsigned int condition;
         struct task_struct *tsk = current;
 
+        trace_hardirqs_fixup();
+
         get_debugreg(condition, 6);
 
         if (notify_die(DIE_DEBUG, "debug", regs, condition, error_code,
diff --git a/arch/x86/kernel/traps_64.c b/arch/x86/kernel/traps_64.c
index 4a6bd4965f5..d11525ad81b 100644
--- a/arch/x86/kernel/traps_64.c
+++ b/arch/x86/kernel/traps_64.c
@@ -31,6 +31,7 @@
 #include <linux/uaccess.h>
 #include <linux/bug.h>
 #include <linux/kdebug.h>
+#include <linux/utsname.h>
 
 #if defined(CONFIG_EDAC)
 #include <linux/edac.h>
@@ -400,6 +401,12 @@ void show_stack(struct task_struct *tsk, unsigned long * rsp)
 void dump_stack(void)
 {
         unsigned long dummy;
+
+        printk("Pid: %d, comm: %.20s %s %s %.*s\n",
+                current->pid, current->comm, print_tainted(),
+                init_utsname()->release,
+                (int)strcspn(init_utsname()->version, " "),
+                init_utsname()->version);
         show_trace(NULL, NULL, &dummy);
 }
 
@@ -846,6 +853,8 @@ asmlinkage void __kprobes do_debug(struct pt_regs * regs,
         struct task_struct *tsk = current;
         siginfo_t info;
 
+        trace_hardirqs_fixup();
+
         get_debugreg(condition, 6);
 
         if (notify_die(DIE_DEBUG, "debug", regs, condition, error_code,
diff --git a/arch/x86/pci/common.c b/arch/x86/pci/common.c
index f4386990b15..86274639066 100644
--- a/arch/x86/pci/common.c
+++ b/arch/x86/pci/common.c
@@ -315,6 +315,22 @@ static struct dmi_system_id __devinitdata pciprobe_dmi_table[] = {
                 },
         },
 #endif
+        {
+                .callback = set_bf_sort,
+                .ident = "HP ProLiant DL385 G2",
+                .matches = {
+                        DMI_MATCH(DMI_SYS_VENDOR, "HP"),
+                        DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant DL385 G2"),
+                },
+        },
+        {
+                .callback = set_bf_sort,
+                .ident = "HP ProLiant DL585 G2",
+                .matches = {
+                        DMI_MATCH(DMI_SYS_VENDOR, "HP"),
+                        DMI_MATCH(DMI_PRODUCT_NAME, "ProLiant DL585 G2"),
+                },
+        },
         {}
 };
 
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index 7b6c20eeeaf..b1fbee3f7fe 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -1673,6 +1673,7 @@ int __cpuinit acpi_processor_power_init(struct acpi_processor *pr,
 
         if (!first_run) {
                 dmi_check_system(processor_power_dmi_table);
+                max_cstate = acpi_processor_cstate_check(max_cstate);
                 if (max_cstate < ACPI_C_STATES_MAX)
                         printk(KERN_NOTICE
                                "ACPI: processor limited to max C-state %d\n",
diff --git a/include/asm-ia64/acpi.h b/include/asm-ia64/acpi.h
index 49730ffbbae..81bcd5e5178 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 0693689d414..f8a89793ac8 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 4091b33dcb1..be158b27d54 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 37ac3ff90fa..24c6a2b5951 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
diff --git a/kernel/time/ntp.c b/kernel/time/ntp.c
index 14a2ecf2b31..e64efaf957e 100644
--- a/kernel/time/ntp.c
+++ b/kernel/time/ntp.c
@@ -249,10 +249,12 @@ int do_adjtimex(struct timex *txc)
 
         /* Now we validate the data before disabling interrupts */
 
-        if ((txc->modes & ADJ_OFFSET_SINGLESHOT) == ADJ_OFFSET_SINGLESHOT)
+        if ((txc->modes & ADJ_OFFSET_SINGLESHOT) == ADJ_OFFSET_SINGLESHOT) {
           /* singleshot must not be used with any other mode bits */
-                if (txc->modes != ADJ_OFFSET_SINGLESHOT)
+                if (txc->modes != ADJ_OFFSET_SINGLESHOT &&
+                                        txc->modes != ADJ_OFFSET_SS_READ)
                         return -EINVAL;
+        }
 
         if (txc->modes != ADJ_OFFSET_SINGLESHOT && (txc->modes & ADJ_OFFSET))
           /* adjustment Offset limited to +- .512 seconds */
@@ -372,7 +374,8 @@ int do_adjtimex(struct timex *txc)
 leave:  if ((time_status & (STA_UNSYNC|STA_CLOCKERR)) != 0)
                 result = TIME_ERROR;
 
-        if ((txc->modes & ADJ_OFFSET_SINGLESHOT) == ADJ_OFFSET_SINGLESHOT)
+        if ((txc->modes == ADJ_OFFSET_SINGLESHOT) ||
+                        (txc->modes == ADJ_OFFSET_SS_READ))
                 txc->offset = save_adjust;
         else
                 txc->offset = ((long)shift_right(time_offset, SHIFT_UPDATE)) *