6 files changed, 62 insertions, 31 deletions

diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index 289247d974c..0ca27c7b0e8 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -637,6 +637,38 @@ static int __init acpi_parse_hpet(struct acpi_table_header *table)
         }
 
         hpet_address = hpet_tbl->address.address;
+
+        /*
+         * Some broken BIOSes advertise HPET at 0x0. We really do not
+         * want to allocate a resource there.
+         */
+        if (!hpet_address) {
+                printk(KERN_WARNING PREFIX
+                       "HPET id: %#x base: %#lx is invalid\n",
+                       hpet_tbl->id, hpet_address);
+                return 0;
+        }
+#ifdef CONFIG_X86_64
+        /*
+         * Some even more broken BIOSes advertise HPET at
+         * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add
+         * some noise:
+         */
+        if (hpet_address == 0xfed0000000000000UL) {
+                if (!hpet_force_user) {
+                        printk(KERN_WARNING PREFIX "HPET id: %#x "
+                               "base: 0xfed0000000000000 is bogus\n "
+                               "try hpet=force on the kernel command line to "
+                               "fix it up to 0xfed00000.\n", hpet_tbl->id);
+                        hpet_address = 0;
+                        return 0;
+                }
+                printk(KERN_WARNING PREFIX
+                       "HPET id: %#x base: 0xfed0000000000000 fixed up "
+                       "to 0xfed00000.\n", hpet_tbl->id);
+                hpet_address >>= 32;
+        }
+#endif
         printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",
                hpet_tbl->id, hpet_address);
 
diff --git a/arch/x86/kernel/cpu/mcheck/mce_64.c b/arch/x86/kernel/cpu/mcheck/mce_64.c
index 447b351f1f2..4b21d29fb5a 100644
--- a/arch/x86/kernel/cpu/mcheck/mce_64.c
+++ b/arch/x86/kernel/cpu/mcheck/mce_64.c
@@ -810,7 +810,7 @@ static __cpuinit int mce_create_device(unsigned int cpu)
         int err;
         int i;
 
-        if (!mce_available(&cpu_data(cpu)))
+        if (!mce_available(&boot_cpu_data))
                 return -EIO;
 
         memset(&per_cpu(device_mce, cpu).kobj, 0, sizeof(struct kobject));
diff --git a/arch/x86/kernel/cpu/proc.c b/arch/x86/kernel/cpu/proc.c
index 066f8c6af4d..3900e46d66d 100644
--- a/arch/x86/kernel/cpu/proc.c
+++ b/arch/x86/kernel/cpu/proc.c
@@ -89,8 +89,6 @@ static int show_cpuinfo(struct seq_file *m, void *v)
         int fpu_exception;
 
 #ifdef CONFIG_SMP
-        if (!cpu_online(n))
-                return 0;
         n = c->cpu_index;
 #endif
         seq_printf(m, "processor\t: %d\n"
@@ -177,14 +175,14 @@ static int show_cpuinfo(struct seq_file *m, void *v)
 static void *c_start(struct seq_file *m, loff_t *pos)
 {
         if (*pos == 0)  /* just in case, cpu 0 is not the first */
-                *pos = first_cpu(cpu_possible_map);
-        if ((*pos) < NR_CPUS && cpu_possible(*pos))
+                *pos = first_cpu(cpu_online_map);
+        if ((*pos) < NR_CPUS && cpu_online(*pos))
                 return &cpu_data(*pos);
         return NULL;
 }
 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 {
-        *pos = next_cpu(*pos, cpu_possible_map);
+        *pos = next_cpu(*pos, cpu_online_map);
         return c_start(m, pos);
 }
 static void c_stop(struct seq_file *m, void *v)
diff --git a/arch/x86/kernel/reboot_fixups_32.c b/arch/x86/kernel/reboot_fixups_32.c
index 1a07bbea7be..f452726c0fe 100644
--- a/arch/x86/kernel/reboot_fixups_32.c
+++ b/arch/x86/kernel/reboot_fixups_32.c
@@ -39,6 +39,7 @@ struct device_fixup {
 static struct device_fixup fixups_table[] = {
 { PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_LEGACY, cs5530a_warm_reset },
 { PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_ISA, cs5536_warm_reset },
+{ PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_SC1100_BRIDGE, cs5530a_warm_reset },
 };
 
 /*
diff --git a/arch/x86/kernel/setup_64.c b/arch/x86/kernel/setup_64.c
index 238633d3d09..30d94d1d5f5 100644
--- a/arch/x86/kernel/setup_64.c
+++ b/arch/x86/kernel/setup_64.c
@@ -892,7 +892,6 @@ void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c)
 
 #ifdef CONFIG_SMP
         c->phys_proc_id = (cpuid_ebx(1) >> 24) & 0xff;
-        c->cpu_index = 0;
 #endif
 }
 
@@ -1078,8 +1077,6 @@ static int show_cpuinfo(struct seq_file *m, void *v)
 
 
 #ifdef CONFIG_SMP
-        if (!cpu_online(c->cpu_index))
-                return 0;
         cpu = c->cpu_index;
 #endif
 
@@ -1171,15 +1168,15 @@ static int show_cpuinfo(struct seq_file *m, void *v)
 static void *c_start(struct seq_file *m, loff_t *pos)
 {
         if (*pos == 0)  /* just in case, cpu 0 is not the first */
-                *pos = first_cpu(cpu_possible_map);
-        if ((*pos) < NR_CPUS && cpu_possible(*pos))
+                *pos = first_cpu(cpu_online_map);
+        if ((*pos) < NR_CPUS && cpu_online(*pos))
                 return &cpu_data(*pos);
         return NULL;
 }
 
 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 {
-        *pos = next_cpu(*pos, cpu_possible_map);
+        *pos = next_cpu(*pos, cpu_online_map);
         return c_start(m, pos);
 }
 
diff --git a/arch/x86/kernel/time_64.c b/arch/x86/kernel/time_64.c
index c821edc3221..368b1942b39 100644
--- a/arch/x86/kernel/time_64.c
+++ b/arch/x86/kernel/time_64.c
@@ -82,18 +82,15 @@ static int set_rtc_mmss(unsigned long nowtime)
         int retval = 0;
         int real_seconds, real_minutes, cmos_minutes;
         unsigned char control, freq_select;
+        unsigned long flags;
 
 /*
- * IRQs are disabled when we're called from the timer interrupt,
- * no need for spin_lock_irqsave()
+ * set_rtc_mmss is called when irqs are enabled, so disable irqs here
  */
-
-        spin_lock(&rtc_lock);
-
+        spin_lock_irqsave(&rtc_lock, flags);
 /*
  * Tell the clock it's being set and stop it.
  */
-
         control = CMOS_READ(RTC_CONTROL);
         CMOS_WRITE(control | RTC_SET, RTC_CONTROL);
 
@@ -138,7 +135,7 @@ static int set_rtc_mmss(unsigned long nowtime)
         CMOS_WRITE(control, RTC_CONTROL);
         CMOS_WRITE(freq_select, RTC_FREQ_SELECT);
 
-        spin_unlock(&rtc_lock);
+        spin_unlock_irqrestore(&rtc_lock, flags);
 
         return retval;
 }
@@ -164,21 +161,27 @@ unsigned long read_persistent_clock(void)
         unsigned century = 0;
 
         spin_lock_irqsave(&rtc_lock, flags);
+        /*
+         * if UIP is clear, then we have >= 244 microseconds before RTC
+         * registers will be updated.  Spec sheet says that this is the
+         * reliable way to read RTC - registers invalid (off bus) during update
+         */
+        while ((CMOS_READ(RTC_FREQ_SELECT) & RTC_UIP))
+                cpu_relax();
 
-        do {
-                sec = CMOS_READ(RTC_SECONDS);
-                min = CMOS_READ(RTC_MINUTES);
-                hour = CMOS_READ(RTC_HOURS);
-                day = CMOS_READ(RTC_DAY_OF_MONTH);
-                mon = CMOS_READ(RTC_MONTH);
-                year = CMOS_READ(RTC_YEAR);
+
+        /* now read all RTC registers while stable with interrupts disabled */
+        sec = CMOS_READ(RTC_SECONDS);
+        min = CMOS_READ(RTC_MINUTES);
+        hour = CMOS_READ(RTC_HOURS);
+        day = CMOS_READ(RTC_DAY_OF_MONTH);
+        mon = CMOS_READ(RTC_MONTH);
+        year = CMOS_READ(RTC_YEAR);
 #ifdef CONFIG_ACPI
-                if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID &&
-                                        acpi_gbl_FADT.century)
-                        century = CMOS_READ(acpi_gbl_FADT.century);
+        if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID &&
+                                acpi_gbl_FADT.century)
+                century = CMOS_READ(acpi_gbl_FADT.century);
 #endif
-        } while (sec != CMOS_READ(RTC_SECONDS));
-
         spin_unlock_irqrestore(&rtc_lock, flags);
 
         /*