1 files changed, 13 insertions, 6 deletions

diff --git a/arch/i386/kernel/acpi/boot.c b/arch/i386/kernel/acpi/boot.c
index 2111529dea77..79577f0ace98 100644
--- a/arch/i386/kernel/acpi/boot.c
+++ b/arch/i386/kernel/acpi/boot.c
@@ -248,10 +248,17 @@ acpi_parse_lapic(acpi_table_entry_header * header, const unsigned long end)
 
         acpi_table_print_madt_entry(header);
 
-        /* Register even disabled CPUs for cpu hotplug */
-
-        x86_acpiid_to_apicid[processor->acpi_id] = processor->id;
+        /* Record local apic id only when enabled */
+        if (processor->flags.enabled)
+                x86_acpiid_to_apicid[processor->acpi_id] = processor->id;
 
+        /*
+         * We need to register disabled CPU as well to permit
+         * counting disabled CPUs. This allows us to size
+         * cpus_possible_map more accurately, to permit
+         * to not preallocating memory for all NR_CPUS
+         * when we use CPU hotplug.
+         */
         mp_register_lapic(processor->id,        /* APIC ID */
                           processor->flags.enabled);    /* Enabled? */
 
@@ -464,7 +471,7 @@ int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
  * 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)
 {
         unsigned int irq;
         unsigned int plat_gsi = gsi;
@@ -476,14 +483,14 @@ int acpi_register_gsi(u32 gsi, int edge_level, int active_high_low)
         if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
                 extern void eisa_set_level_irq(unsigned int irq);
 
-                if (edge_level == ACPI_LEVEL_SENSITIVE)
+                if (triggering == ACPI_LEVEL_SENSITIVE)
                         eisa_set_level_irq(gsi);
         }
 #endif
 
 #ifdef CONFIG_X86_IO_APIC
         if (acpi_irq_model == ACPI_IRQ_MODEL_IOAPIC) {
-                plat_gsi = mp_register_gsi(gsi, edge_level, active_high_low);
+                plat_gsi = mp_register_gsi(gsi, triggering, polarity);
         }
 #endif
         acpi_gsi_to_irq(plat_gsi, &irq);