[PATCH] ARM SMP: Initialise cpu_present_map

Rather than relying on the fixup code in init/main.c, explicitly
initialise cpu_present_map.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

2 files changed, 5 insertions, 2 deletions

diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index 78c24a1266b..7ae45c3fc83 100644
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -236,6 +236,7 @@ void __init smp_prepare_boot_cpu(void)
         unsigned int cpu = smp_processor_id();
 
         cpu_set(cpu, cpu_possible_map);
+        cpu_set(cpu, cpu_present_map);
         cpu_set(cpu, cpu_online_map);
 }
 
diff --git a/arch/arm/mach-integrator/platsmp.c b/arch/arm/mach-integrator/platsmp.c
index 88f40a5189c..2ba02577709 100644
--- a/arch/arm/mach-integrator/platsmp.c
+++ b/arch/arm/mach-integrator/platsmp.c
@@ -174,11 +174,13 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
                 max_cpus = ncores;
 
         /*
-         * Initialise the present mask - this tells us which CPUs should
-         * be present.
+         * Initialise the possible/present maps.
+         * cpu_possible_map describes the set of CPUs which may be present
+         * cpu_present_map describes the set of CPUs populated
          */
         for (i = 0; i < max_cpus; i++) {
                 cpu_set(i, cpu_possible_map);
+                cpu_set(i, cpu_present_map);
         }
 
         /*