Merge git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6

[sfrench/cifs-2.6.git] / arch / x86 / kernel / acpi / boot.c

diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index afd2afe9102d33e26d8c837333ca4115215d578b..d2a58431a074b3f6282b58489635076878bdf2d3 100644 (file)
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -99,7 +99,7 @@ static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
 
 /*
  * The default interrupt routing model is PIC (8259).  This gets
- * overriden if IOAPICs are enumerated (below).
+ * overridden if IOAPICs are enumerated (below).
  */
 enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
 
@@ -414,8 +414,8 @@ acpi_parse_nmi_src(struct acpi_subtable_header * header, const unsigned long end
  *
  * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
  * for the 8259 PIC.  bit[n] = 1 means irq[n] is Level, otherwise Edge.
- * ECLR1 is IRQ's 0-7 (IRQ 0, 1, 2 must be 0)
- * ECLR2 is IRQ's 8-15 (IRQ 8, 13 must be 0)
+ * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
+ * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
  */
 
 void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
@@ -427,7 +427,7 @@ void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
        old = inb(0x4d0) | (inb(0x4d1) << 8);
 
        /*
-        * If we use ACPI to set PCI irq's, then we should clear ELCR
+        * If we use ACPI to set PCI IRQs, then we should clear ELCR
         * since we will set it correctly as we enable the PCI irq
         * routing.
         */
@@ -496,7 +496,8 @@ EXPORT_SYMBOL(acpi_register_gsi);
  *  ACPI based hotplug support for CPU
  */
 #ifdef CONFIG_ACPI_HOTPLUG_CPU
-int acpi_map_lsapic(acpi_handle handle, int *pcpu)
+
+static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
 {
        struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
        union acpi_object *obj;
@@ -551,11 +552,16 @@ int acpi_map_lsapic(acpi_handle handle, int *pcpu)
        return 0;
 }
 
+/* wrapper to silence section mismatch warning */
+int __ref acpi_map_lsapic(acpi_handle handle, int *pcpu)
+{
+       return _acpi_map_lsapic(handle, pcpu);
+}
 EXPORT_SYMBOL(acpi_map_lsapic);
 
 int acpi_unmap_lsapic(int cpu)
 {
-       x86_cpu_to_apicid[cpu] = -1;
+       per_cpu(x86_cpu_to_apicid, cpu) = -1;
        cpu_clear(cpu, cpu_present_map);
        num_processors--;
 
@@ -637,6 +643,38 @@ 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);