patch-2_6_7-vs1_9_1_12

[linux-2.6.git] / arch / x86_64 / kernel / smpboot.c

diff --git a/arch/x86_64/kernel/smpboot.c b/arch/x86_64/kernel/smpboot.c
index 4d9c47f..ba2cba6 100644 (file)
--- a/arch/x86_64/kernel/smpboot.c
+++ b/arch/x86_64/kernel/smpboot.c
@@ -73,7 +73,7 @@ struct cpuinfo_x86 cpu_data[NR_CPUS] __cacheline_aligned;
 /* Set when the idlers are all forked */
 int smp_threads_ready;
 
-char cpu_sibling_map[NR_CPUS] __cacheline_aligned;
+cpumask_t cpu_sibling_map[NR_CPUS] __cacheline_aligned;
 
 /*
  * Trampoline 80x86 program as an array.
@@ -874,31 +874,38 @@ static void __init smp_boot_cpus(unsigned int max_cpus)
        }
 
        /*
-        * If Hyper-Threading is avaialble, construct cpu_sibling_map[], so
-        * that we can tell the sibling CPU efficiently.
+        * Construct cpu_sibling_map[], so that we can tell the
+        * sibling CPU efficiently.
         */
-       if (cpu_has_ht && smp_num_siblings > 1) {
-               for (cpu = 0; cpu < NR_CPUS; cpu++)
-                       cpu_sibling_map[cpu] = NO_PROC_ID;
-               
-               for (cpu = 0; cpu < NR_CPUS; cpu++) {
-                       int     i;
-                       if (!cpu_isset(cpu, cpu_callout_map))
-                               continue;
+       for (cpu = 0; cpu < NR_CPUS; cpu++)
+               cpus_clear(cpu_sibling_map[cpu]);
+
+       for (cpu = 0; cpu < NR_CPUS; cpu++) {
+               int siblings = 0;
+               int i;
+               if (!cpu_isset(cpu, cpu_callout_map))
+                       continue;
 
+               if (smp_num_siblings > 1) {
                        for (i = 0; i < NR_CPUS; i++) {
-                               if (i == cpu || !cpu_isset(i, cpu_callout_map))
+                               if (!cpu_isset(i, cpu_callout_map))
                                        continue;
                                if (phys_proc_id[cpu] == phys_proc_id[i]) {
-                                       cpu_sibling_map[cpu] = i;
-                                       break;
+                                       siblings++;
+                                       cpu_set(i, cpu_sibling_map[cpu]);
                                }
                        }
-                       if (cpu_sibling_map[cpu] == (char)NO_PROC_ID) {
-                               smp_num_siblings = 1;
-                               printk(KERN_WARNING "WARNING: No sibling found for CPU %d.\n", cpu);
-                       }
+               } else { 
+                       siblings++;
+                       cpu_set(cpu, cpu_sibling_map[cpu]);
                }
+
+               if (siblings != smp_num_siblings) {
+                       printk(KERN_WARNING 
+              "WARNING: %d siblings found for CPU%d, should be %d\n", 
+                              siblings, cpu, smp_num_siblings);
+                       smp_num_siblings = siblings;
+               }       
        }
 
        Dprintk("Boot done.\n");