1 files changed, 38 insertions, 13 deletions

diff --git a/arch/sparc64/kernel/smp.c b/arch/sparc64/kernel/smp.c
index 90eaca3ec9a6..f03d52d0b88d 100644
--- a/arch/sparc64/kernel/smp.c
+++ b/arch/sparc64/kernel/smp.c
@@ -1264,7 +1264,6 @@ void __init smp_tick_init(void)
         boot_cpu_id = hard_smp_processor_id();
         current_tick_offset = timer_tick_offset;
 
-        cpu_set(boot_cpu_id, cpu_online_map);
         prof_counter(boot_cpu_id) = prof_multiplier(boot_cpu_id) = 1;
 }
 
@@ -1288,6 +1287,40 @@ int setup_profiling_timer(unsigned int multiplier)
         return 0;
 }
 
+static void __init smp_tune_scheduling(void)
+{
+        int instance, node;
+        unsigned int def, smallest = ~0U;
+
+        def = ((tlb_type == hypervisor) ?
+               (3 * 1024 * 1024) :
+               (4 * 1024 * 1024));
+
+        instance = 0;
+        while (!cpu_find_by_instance(instance, &node, NULL)) {
+                unsigned int val;
+
+                val = prom_getintdefault(node, "ecache-size", def);
+                if (val < smallest)
+                        smallest = val;
+
+                instance++;
+        }
+
+        /* Any value less than 256K is nonsense.  */
+        if (smallest < (256U * 1024U))
+                smallest = 256 * 1024;
+
+        max_cache_size = smallest;
+
+        if (smallest < 1U * 1024U * 1024U)
+                printk(KERN_INFO "Using max_cache_size of %uKB\n",
+                       smallest / 1024U);
+        else
+                printk(KERN_INFO "Using max_cache_size of %uMB\n",
+                       smallest / 1024U / 1024U);
+}
+
 /* Constrain the number of cpus to max_cpus.  */
 void __init smp_prepare_cpus(unsigned int max_cpus)
 {
@@ -1323,6 +1356,7 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
         }
 
         smp_store_cpu_info(boot_cpu_id);
+        smp_tune_scheduling();
 }
 
 /* Set this up early so that things like the scheduler can init
@@ -1345,18 +1379,6 @@ void __init smp_setup_cpu_possible_map(void)
 
 void __devinit smp_prepare_boot_cpu(void)
 {
-        int cpu = hard_smp_processor_id();
-
-        if (cpu >= NR_CPUS) {
-                prom_printf("Serious problem, boot cpu id >= NR_CPUS\n");
-                prom_halt();
-        }
-
-        current_thread_info()->cpu = cpu;
-        __local_per_cpu_offset = __per_cpu_offset(cpu);
-
-        cpu_set(smp_processor_id(), cpu_online_map);
-        cpu_set(smp_processor_id(), phys_cpu_present_map);
 }
 
 int __devinit __cpu_up(unsigned int cpu)
@@ -1433,4 +1455,7 @@ void __init setup_per_cpu_areas(void)
 
         for (i = 0; i < NR_CPUS; i++, ptr += size)
                 memcpy(ptr, __per_cpu_start, __per_cpu_end - __per_cpu_start);
+
+        /* Setup %g5 for the boot cpu.  */
+        __local_per_cpu_offset = __per_cpu_offset(smp_processor_id());
 }