1 files changed, 56 insertions, 3 deletions

diff --git a/arch/ia64/kernel/acpi.c b/arch/ia64/kernel/acpi.c
index 9ad94ddf6687..ecd44bdc8394 100644
--- a/arch/ia64/kernel/acpi.c
+++ b/arch/ia64/kernel/acpi.c
@@ -567,16 +567,16 @@ void __init acpi_numa_arch_fixup(void)
  * success: return IRQ number (>=0)
  * failure: return < 0
  */
-int acpi_register_gsi(u32 gsi, int edge_level, int active_high_low)
+int acpi_register_gsi(u32 gsi, int triggering, int polarity)
 {
         if (has_8259 && gsi < 16)
                 return isa_irq_to_vector(gsi);
 
         return iosapic_register_intr(gsi,
-                                     (active_high_low ==
+                                     (polarity ==
                                       ACPI_ACTIVE_HIGH) ? IOSAPIC_POL_HIGH :
                                      IOSAPIC_POL_LOW,
-                                     (edge_level ==
+                                     (triggering ==
                                       ACPI_EDGE_SENSITIVE) ? IOSAPIC_EDGE :
                                      IOSAPIC_LEVEL);
 }
@@ -761,6 +761,59 @@ int acpi_map_cpu2node(acpi_handle handle, int cpu, long physid)
         return (0);
 }
 
+int additional_cpus __initdata = -1;
+
+static __init int setup_additional_cpus(char *s)
+{
+        if (s)
+                additional_cpus = simple_strtol(s, NULL, 0);
+
+        return 0;
+}
+
+early_param("additional_cpus", setup_additional_cpus);
+
+/*
+ * cpu_possible_map should be static, it cannot change as cpu's
+ * are onlined, or offlined. The reason is per-cpu data-structures
+ * are allocated by some modules at init time, and dont expect to
+ * do this dynamically on cpu arrival/departure.
+ * cpu_present_map on the other hand can change dynamically.
+ * In case when cpu_hotplug is not compiled, then we resort to current
+ * behaviour, which is cpu_possible == cpu_present.
+ * - Ashok Raj
+ *
+ * Three ways to find out the number of additional hotplug CPUs:
+ * - If the BIOS specified disabled CPUs in ACPI/mptables use that.
+ * - The user can overwrite it with additional_cpus=NUM
+ * - Otherwise don't reserve additional CPUs.
+ */
+__init void prefill_possible_map(void)
+{
+        int i;
+        int possible, disabled_cpus;
+
+        disabled_cpus = total_cpus - available_cpus;
+
+        if (additional_cpus == -1) {
+                if (disabled_cpus > 0)
+                        additional_cpus = disabled_cpus;
+                else
+                        additional_cpus = 0;
+        }
+
+        possible = available_cpus + additional_cpus;
+
+        if (possible > NR_CPUS)
+                possible = NR_CPUS;
+
+        printk(KERN_INFO "SMP: Allowing %d CPUs, %d hotplug CPUs\n",
+                possible, max((possible - available_cpus), 0));
+
+        for (i = 0; i < possible; i++)
+                cpu_set(i, cpu_possible_map);
+}
+
 int acpi_map_lsapic(acpi_handle handle, int *pcpu)
 {
         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };