Merge commit 'v2.6.27-rc3' into x86/prototypes

[linux-2.6-omap-h63xx.git] / arch / x86 / kernel / smpboot.c

diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index a9331a42f76fa3ccc2d8a8dca8ae9e2e55e3f0ad..6112c3632345fda743e94da3c26b78798ecf29b7 100644 (file)
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -326,12 +326,16 @@ static void __cpuinit start_secondary(void *unused)
         * for which cpus receive the IPI. Holding this
         * lock helps us to not include this cpu in a currently in progress
         * smp_call_function().
+        *
+        * We need to hold vector_lock so there the set of online cpus
+        * does not change while we are assigning vectors to cpus.  Holding
+        * this lock ensures we don't half assign or remove an irq from a cpu.
         */
        ipi_call_lock_irq();
-#ifdef CONFIG_X86_IO_APIC
-       setup_vector_irq(smp_processor_id());
-#endif
+       lock_vector_lock();
+       __setup_vector_irq(smp_processor_id());
        cpu_set(smp_processor_id(), cpu_online_map);
+       unlock_vector_lock();
        ipi_call_unlock_irq();
        per_cpu(cpu_state, smp_processor_id()) = CPU_ONLINE;
 
@@ -438,7 +442,7 @@ void __cpuinit set_cpu_sibling_map(int cpu)
        cpu_set(cpu, cpu_sibling_setup_map);
 
        if (smp_num_siblings > 1) {
-               for_each_cpu_mask(i, cpu_sibling_setup_map) {
+               for_each_cpu_mask_nr(i, cpu_sibling_setup_map) {
                        if (c->phys_proc_id == cpu_data(i).phys_proc_id &&
                            c->cpu_core_id == cpu_data(i).cpu_core_id) {
                                cpu_set(i, per_cpu(cpu_sibling_map, cpu));
@@ -461,7 +465,7 @@ void __cpuinit set_cpu_sibling_map(int cpu)
                return;
        }
 
-       for_each_cpu_mask(i, cpu_sibling_setup_map) {
+       for_each_cpu_mask_nr(i, cpu_sibling_setup_map) {
                if (per_cpu(cpu_llc_id, cpu) != BAD_APICID &&
                    per_cpu(cpu_llc_id, cpu) == per_cpu(cpu_llc_id, i)) {
                        cpu_set(i, c->llc_shared_map);
@@ -990,7 +994,17 @@ int __cpuinit native_cpu_up(unsigned int cpu)
        flush_tlb_all();
        low_mappings = 1;
 
+#ifdef CONFIG_X86_PC
+       if (def_to_bigsmp && apicid > 8) {
+               printk(KERN_WARNING
+                       "More than 8 CPUs detected - skipping them.\n"
+                       "Use CONFIG_X86_GENERICARCH and CONFIG_X86_BIGSMP.\n");
+               err = -1;
+       } else
+               err = do_boot_cpu(apicid, cpu);
+#else
        err = do_boot_cpu(apicid, cpu);
+#endif
 
        zap_low_mappings();
        low_mappings = 0;
@@ -1219,7 +1233,7 @@ static void remove_siblinginfo(int cpu)
        int sibling;
        struct cpuinfo_x86 *c = &cpu_data(cpu);
 
-       for_each_cpu_mask(sibling, per_cpu(cpu_core_map, cpu)) {
+       for_each_cpu_mask_nr(sibling, per_cpu(cpu_core_map, cpu)) {
                cpu_clear(cpu, per_cpu(cpu_core_map, sibling));
                /*/
                 * last thread sibling in this cpu core going down
@@ -1228,7 +1242,7 @@ static void remove_siblinginfo(int cpu)
                        cpu_data(sibling).booted_cores--;
        }
 
-       for_each_cpu_mask(sibling, per_cpu(cpu_sibling_map, cpu))
+       for_each_cpu_mask_nr(sibling, per_cpu(cpu_sibling_map, cpu))
                cpu_clear(cpu, per_cpu(cpu_sibling_map, sibling));
        cpus_clear(per_cpu(cpu_sibling_map, cpu));
        cpus_clear(per_cpu(cpu_core_map, cpu));
@@ -1336,7 +1350,9 @@ int __cpu_disable(void)
        remove_siblinginfo(cpu);
 
        /* It's now safe to remove this processor from the online map */
+       lock_vector_lock();
        remove_cpu_from_maps(cpu);
+       unlock_vector_lock();
        fixup_irqs(cpu_online_map);
        return 0;
 }