Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-tip

* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-tip:
  x86: Fix double enable_IR_x2apic() call on SMP kernel on !SMP boards
  x86: Increase CONFIG_NODES_SHIFT max to 10
  ibft, x86: Change reserve_ibft_region() to find_ibft_region()
  x86, hpet: Fix bug in RTC emulation
  x86, hpet: Erratum workaround for read after write of HPET comparator
  bootmem, x86: Fix 32bit numa system without RAM on node 0
  nobootmem, x86: Fix 32bit numa system without RAM on node 0
  x86: Handle overlapping mptables
  x86: Make e820_remove_range to handle all covered case
  x86-32, resume: do a global tlb flush in S4 resume

10 files changed, 82 insertions, 26 deletions

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 0eacb1ffb421..9458685902bd 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -1216,8 +1216,8 @@ config NUMA_EMU
 
 config NODES_SHIFT
         int "Maximum NUMA Nodes (as a power of 2)" if !MAXSMP
-        range 1 9
-        default "9" if MAXSMP
+        range 1 10
+        default "10" if MAXSMP
         default "6" if X86_64
         default "4" if X86_NUMAQ
         default "3"
diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index 00187f1fcfb7..e5a4a1e01618 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -1640,8 +1640,10 @@ int __init APIC_init_uniprocessor(void)
         }
 #endif
 
+#ifndef CONFIG_SMP
         enable_IR_x2apic();
         default_setup_apic_routing();
+#endif
 
         verify_local_APIC();
         connect_bsp_APIC();
diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
index 740b440fbd73..7bca3c6a02fb 100644
--- a/arch/x86/kernel/e820.c
+++ b/arch/x86/kernel/e820.c
@@ -519,29 +519,45 @@ u64 __init e820_remove_range(u64 start, u64 size, unsigned old_type,
         printk(KERN_DEBUG "e820 remove range: %016Lx - %016Lx ",
                        (unsigned long long) start,
                        (unsigned long long) end);
-        e820_print_type(old_type);
+        if (checktype)
+                e820_print_type(old_type);
         printk(KERN_CONT "\n");
 
         for (i = 0; i < e820.nr_map; i++) {
                 struct e820entry *ei = &e820.map[i];
                 u64 final_start, final_end;
+                u64 ei_end;
 
                 if (checktype && ei->type != old_type)
                         continue;
+
+                ei_end = ei->addr + ei->size;
                 /* totally covered? */
-                if (ei->addr >= start &&
-                    (ei->addr + ei->size) <= (start + size)) {
+                if (ei->addr >= start && ei_end <= end) {
                         real_removed_size += ei->size;
                         memset(ei, 0, sizeof(struct e820entry));
                         continue;
                 }
+
+                /* new range is totally covered? */
+                if (ei->addr < start && ei_end > end) {
+                        e820_add_region(end, ei_end - end, ei->type);
+                        ei->size = start - ei->addr;
+                        real_removed_size += size;
+                        continue;
+                }
+
                 /* partially covered */
                 final_start = max(start, ei->addr);
-                final_end = min(start + size, ei->addr + ei->size);
+                final_end = min(end, ei_end);
                 if (final_start >= final_end)
                         continue;
                 real_removed_size += final_end - final_start;
 
+                /*
+                 * left range could be head or tail, so need to update
+                 * size at first.
+                 */
                 ei->size -= final_end - final_start;
                 if (ei->addr < final_start)
                         continue;
diff --git a/arch/x86/kernel/hpet.c b/arch/x86/kernel/hpet.c
index d10a7e7294f4..23b4ecdffa9b 100644
--- a/arch/x86/kernel/hpet.c
+++ b/arch/x86/kernel/hpet.c
@@ -400,9 +400,15 @@ static int hpet_next_event(unsigned long delta,
          * then we might have a real hardware problem. We can not do
          * much about it here, but at least alert the user/admin with
          * a prominent warning.
+         * An erratum on some chipsets (ICH9,..), results in comparator read
+         * immediately following a write returning old value. Workaround
+         * for this is to read this value second time, when first
+         * read returns old value.
          */
-        WARN_ONCE(hpet_readl(HPET_Tn_CMP(timer)) != cnt,
+        if (unlikely((u32)hpet_readl(HPET_Tn_CMP(timer)) != cnt)) {
+                WARN_ONCE(hpet_readl(HPET_Tn_CMP(timer)) != cnt,
                   KERN_WARNING "hpet: compare register read back failed.\n");
+        }
 
         return (s32)(hpet_readl(HPET_COUNTER) - cnt) >= 0 ? -ETIME : 0;
 }
@@ -1144,6 +1150,7 @@ int hpet_set_periodic_freq(unsigned long freq)
                 do_div(clc, freq);
                 clc >>= hpet_clockevent.shift;
                 hpet_pie_delta = clc;
+                hpet_pie_limit = 0;
         }
         return 1;
 }
diff --git a/arch/x86/kernel/mpparse.c b/arch/x86/kernel/mpparse.c
index a2c1edd2d3ac..e81030f71a8f 100644
--- a/arch/x86/kernel/mpparse.c
+++ b/arch/x86/kernel/mpparse.c
@@ -664,7 +664,7 @@ static void __init smp_reserve_memory(struct mpf_intel *mpf)
 {
         unsigned long size = get_mpc_size(mpf->physptr);
 
-        reserve_early(mpf->physptr, mpf->physptr+size, "MP-table mpc");
+        reserve_early_overlap_ok(mpf->physptr, mpf->physptr+size, "MP-table mpc");
 }
 
 static int __init smp_scan_config(unsigned long base, unsigned long length)
@@ -693,7 +693,7 @@ static int __init smp_scan_config(unsigned long base, unsigned long length)
                                mpf, (u64)virt_to_phys(mpf));
 
                         mem = virt_to_phys(mpf);
-                        reserve_early(mem, mem + sizeof(*mpf), "MP-table mpf");
+                        reserve_early_overlap_ok(mem, mem + sizeof(*mpf), "MP-table mpf");
                         if (mpf->physptr)
                                 smp_reserve_memory(mpf);
 
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 9570541caf7c..c4851eff57b3 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -607,6 +607,16 @@ static int __init setup_elfcorehdr(char *arg)
 early_param("elfcorehdr", setup_elfcorehdr);
 #endif
 
+static __init void reserve_ibft_region(void)
+{
+        unsigned long addr, size = 0;
+
+        addr = find_ibft_region(&size);
+
+        if (size)
+                reserve_early_overlap_ok(addr, addr + size, "ibft");
+}
+
 #ifdef CONFIG_X86_RESERVE_LOW_64K
 static int __init dmi_low_memory_corruption(const struct dmi_system_id *d)
 {
@@ -909,6 +919,8 @@ void __init setup_arch(char **cmdline_p)
          */
         find_smp_config();