5 files changed, 31 insertions, 13 deletions

diff --git a/arch/x86/Kconfig.cpu b/arch/x86/Kconfig.cpu
index 6761848329fa..f8843c3ae77d 100644
--- a/arch/x86/Kconfig.cpu
+++ b/arch/x86/Kconfig.cpu
@@ -382,14 +382,17 @@ config X86_OOSTORE
 # P6_NOPs are a relatively minor optimization that require a family >=
 # 6 processor, except that it is broken on certain VIA chips.
 # Furthermore, AMD chips prefer a totally different sequence of NOPs
-# (which work on all CPUs).  As a result, disallow these if we're
-# compiling X86_GENERIC but not X86_64 (these NOPs do work on all
-# x86-64 capable chips); the list of processors in the right-hand clause
-# are the cores that benefit from this optimization.
+# (which work on all CPUs).  In addition, it looks like Virtual PC
+# does not understand them.
+#
+# As a result, disallow these if we're not compiling for X86_64 (these
+# NOPs do work on all x86-64 capable chips); the list of processors in
+# the right-hand clause are the cores that benefit from this optimization.
 #
 config X86_P6_NOP
         def_bool y
-        depends on (X86_64 || !X86_GENERIC) && (M686 || MPENTIUMII || MPENTIUMIII || MPENTIUMM || MCORE2 || MPENTIUM4 || MPSC)
+        depends on X86_64
+        depends on (MCORE2 || MPENTIUM4 || MPSC)
 
 config X86_TSC
         def_bool y
diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
index e24d1bc47b46..78e642feac30 100644
--- a/arch/x86/kernel/e820.c
+++ b/arch/x86/kernel/e820.c
@@ -1206,7 +1206,7 @@ static int __init parse_memmap_opt(char *p)
         if (!p)
                 return -EINVAL;
 
-        if (!strcmp(p, "exactmap")) {
+        if (!strncmp(p, "exactmap", 8)) {
 #ifdef CONFIG_CRASH_DUMP
                 /*
                  * If we are doing a crash dump, we still need to know
diff --git a/arch/x86/kernel/hpet.c b/arch/x86/kernel/hpet.c
index 59fd3b6b1303..73deaffadd03 100644
--- a/arch/x86/kernel/hpet.c
+++ b/arch/x86/kernel/hpet.c
@@ -210,8 +210,8 @@ static void hpet_legacy_clockevent_register(void)
         /* Calculate the min / max delta */
         hpet_clockevent.max_delta_ns = clockevent_delta2ns(0x7FFFFFFF,
                                                            &hpet_clockevent);
-        hpet_clockevent.min_delta_ns = clockevent_delta2ns(0x30,
-                                                           &hpet_clockevent);
+        /* 5 usec minimum reprogramming delta. */
+        hpet_clockevent.min_delta_ns = 5000;
 
         /*
          * Start hpet with the boot cpu mask and make it
@@ -270,15 +270,22 @@ static void hpet_legacy_set_mode(enum clock_event_mode mode,
 }
 
 static int hpet_legacy_next_event(unsigned long delta,
-                           struct clock_event_device *evt)
+                                  struct clock_event_device *evt)
 {
-        unsigned long cnt;
+        u32 cnt;
 
         cnt = hpet_readl(HPET_COUNTER);
-        cnt += delta;
+        cnt += (u32) delta;
         hpet_writel(cnt, HPET_T0_CMP);
 
-        return ((long)(hpet_readl(HPET_COUNTER) - cnt ) > 0) ? -ETIME : 0;
+        /*
+         * We need to read back the CMP register to make sure that
+         * what we wrote hit the chip before we compare it to the
+         * counter.
+         */
+        WARN_ON((u32)hpet_readl(HPET_T0_CMP) != cnt);
+
+        return (s32)((u32)hpet_readl(HPET_COUNTER) - cnt) >= 0 ? -ETIME : 0;
 }
 
 /*
diff --git a/arch/x86/kernel/io_delay.c b/arch/x86/kernel/io_delay.c
index 1c3a66a67f83..720d2607aacb 100644
--- a/arch/x86/kernel/io_delay.c
+++ b/arch/x86/kernel/io_delay.c
@@ -92,6 +92,14 @@ static struct dmi_system_id __initdata io_delay_0xed_port_dmi_table[] = {
                         DMI_MATCH(DMI_BOARD_NAME, "30BF")
                 }
         },
+        {
+                .callback       = dmi_io_delay_0xed_port,
+                .ident          = "Presario F700",
+                .matches        = {
+                        DMI_MATCH(DMI_BOARD_VENDOR, "Quanta"),
+                        DMI_MATCH(DMI_BOARD_NAME, "30D3")
+                }
+        },
         { }
 };
 
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 8d28925ebed9..7b3508952b9c 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -1354,7 +1354,7 @@ static const struct pv_mmu_ops xen_mmu_ops __initdata = {
         .ptep_modify_prot_commit = __ptep_modify_prot_commit,
 
         .pte_val = xen_pte_val,
-        .pte_flags = native_pte_val,
+        .pte_flags = native_pte_flags,
         .pgd_val = xen_pgd_val,
 
         .make_pte = xen_make_pte,