Merge branch 'x86/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull miscellaneous x86 fixes from Peter Anvin:
 "The biggest ones are fixing suspend/resume breakage on 32 bits, and an
  interrim fix for mapping over holes that allows AMD kit with more than
  1 TB.

  A final solution for the latter is in the works, but involves some
  fairly invasive changes that will probably mean it will only be
  appropriate for 3.8."

* 'x86/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86, MCE: Remove bios_cmci_threshold sysfs attribute
  x86, amd, mce: Avoid NULL pointer reference on CPU northbridge lookup
  x86: Exclude E820_RESERVED regions and memory holes above 4 GB from direct mapping.
  x86/cache_info: Use ARRAY_SIZE() in amd_l3_attrs()
  x86/reboot: Remove quirk entry for SBC FITPC
  x86, suspend: Correct the restore of CR4, EFER; skip computing EFLAGS.ID

6 files changed, 24 insertions, 34 deletions

diff --git a/arch/x86/kernel/cpu/intel_cacheinfo.c b/arch/x86/kernel/cpu/intel_cacheinfo.c
index 9a7c90d80bc4..93c5451bdd52 100644
--- a/arch/x86/kernel/cpu/intel_cacheinfo.c
+++ b/arch/x86/kernel/cpu/intel_cacheinfo.c
@@ -991,7 +991,7 @@ static struct attribute ** __cpuinit amd_l3_attrs(void)
         if (attrs)
                 return attrs;
 
-        n = sizeof (default_attrs) / sizeof (struct attribute *);
+        n = ARRAY_SIZE(default_attrs);
 
         if (amd_nb_has_feature(AMD_NB_L3_INDEX_DISABLE))
                 n += 2;
diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index 29e87d3b2843..46cbf8689692 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -2209,11 +2209,6 @@ static struct dev_ext_attribute dev_attr_cmci_disabled = {
         &mce_cmci_disabled
 };
 
-static struct dev_ext_attribute dev_attr_bios_cmci_threshold = {
-        __ATTR(bios_cmci_threshold, 0444, device_show_int, NULL),
-        &mce_bios_cmci_threshold
-};
-
 static struct device_attribute *mce_device_attrs[] = {
         &dev_attr_tolerant.attr,
         &dev_attr_check_interval.attr,
@@ -2222,7 +2217,6 @@ static struct device_attribute *mce_device_attrs[] = {
         &dev_attr_dont_log_ce.attr,
         &dev_attr_ignore_ce.attr,
         &dev_attr_cmci_disabled.attr,
-        &dev_attr_bios_cmci_threshold.attr,
         NULL
 };
 
diff --git a/arch/x86/kernel/cpu/mcheck/mce_amd.c b/arch/x86/kernel/cpu/mcheck/mce_amd.c
index c4e916d77378..698b6ec12e0f 100644
--- a/arch/x86/kernel/cpu/mcheck/mce_amd.c
+++ b/arch/x86/kernel/cpu/mcheck/mce_amd.c
@@ -576,12 +576,10 @@ static __cpuinit int threshold_create_bank(unsigned int cpu, unsigned int bank)
         int err = 0;
 
         if (shared_bank[bank]) {
-
                 nb = node_to_amd_nb(amd_get_nb_id(cpu));
-                WARN_ON(!nb);
 
                 /* threshold descriptor already initialized on this node? */
-                if (nb->bank4) {
+                if (nb && nb->bank4) {
                         /* yes, use it */
                         b = nb->bank4;
                         err = kobject_add(b->kobj, &dev->kobj, name);
@@ -615,8 +613,10 @@ static __cpuinit int threshold_create_bank(unsigned int cpu, unsigned int bank)
                 atomic_set(&b->cpus, 1);
 
                 /* nb is already initialized, see above */
-                WARN_ON(nb->bank4);
-                nb->bank4 = b;
+                if (nb) {
+                        WARN_ON(nb->bank4);
+                        nb->bank4 = b;
+                }
         }
 
         err = allocate_threshold_blocks(cpu, bank, 0,
diff --git a/arch/x86/kernel/reboot.c b/arch/x86/kernel/reboot.c
index 52190a938b4a..4e8ba39eaf0f 100644
--- a/arch/x86/kernel/reboot.c
+++ b/arch/x86/kernel/reboot.c
@@ -358,14 +358,6 @@ static struct dmi_system_id __initdata reboot_dmi_table[] = {
                         DMI_MATCH(DMI_PRODUCT_NAME, "VGN-Z540N"),
                 },
         },
-        {       /* Handle problems with rebooting on CompuLab SBC-FITPC2 */
-                .callback = set_bios_reboot,
-                .ident = "CompuLab SBC-FITPC2",
-                .matches = {
-                        DMI_MATCH(DMI_SYS_VENDOR, "CompuLab"),
-                        DMI_MATCH(DMI_PRODUCT_NAME, "SBC-FITPC2"),
-                },
-        },
         {       /* Handle problems with rebooting on ASUS P4S800 */
                 .callback = set_bios_reboot,
                 .ident = "ASUS P4S800",
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index a2bb18e02839..468e98dfd44e 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -920,8 +920,21 @@ void __init setup_arch(char **cmdline_p)
 
 #ifdef CONFIG_X86_64
         if (max_pfn > max_low_pfn) {
-                max_pfn_mapped = init_memory_mapping(1UL<<32,
-                                                     max_pfn<<PAGE_SHIFT);
+                int i;
+                for (i = 0; i < e820.nr_map; i++) {
+                        struct e820entry *ei = &e820.map[i];
+
+                        if (ei->addr + ei->size <= 1UL << 32)
+                                continue;
+
+                        if (ei->type == E820_RESERVED)
+                                continue;
+
+                        max_pfn_mapped = init_memory_mapping(
+                                ei->addr < 1UL << 32 ? 1UL << 32 : ei->addr,
+                                ei->addr + ei->size);
+                }
+
                 /* can we preseve max_low_pfn ?*/
                 max_low_pfn = max_pfn;
         }
diff --git a/arch/x86/realmode/rm/wakeup_asm.S b/arch/x86/realmode/rm/wakeup_asm.S
index e56479e58053..9e7e14797a72 100644
--- a/arch/x86/realmode/rm/wakeup_asm.S
+++ b/arch/x86/realmode/rm/wakeup_asm.S
@@ -74,18 +74,9 @@ ENTRY(wakeup_start)
 
         lidtl   wakeup_idt
 
-        /* Clear the EFLAGS but remember if we have EFLAGS.ID */
-        movl $X86_EFLAGS_ID, %ecx
-        pushl %ecx
-        popfl
-        pushfl
-        popl %edi
+        /* Clear the EFLAGS */
         pushl $0
         popfl
-        pushfl
-        popl %edx
-        xorl %edx, %edi
-        andl %ecx, %edi         /* %edi is zero iff CPUID & %cr4 are missing */
 
         /* Check header signature... */
         movl    signature, %eax
@@ -120,12 +111,12 @@ ENTRY(wakeup_start)
         movl    %eax, %cr3
 
         btl     $WAKEUP_BEHAVIOR_RESTORE_CR4, %edi
-        jz      1f
+        jnc     1f
         movl    pmode_cr4, %eax
         movl    %eax, %cr4
 1:
         btl     $WAKEUP_BEHAVIOR_RESTORE_EFER, %edi
-        jz      1f
+        jnc     1f
         movl    pmode_efer, %eax
         movl    pmode_efer + 4, %edx
         movl    $MSR_EFER, %ecx