WorkStruct: make allyesconfig

[deliverable/linux.git] / arch / i386 / kernel / smpboot.c

diff --git a/arch/i386/kernel/smpboot.c b/arch/i386/kernel/smpboot.c
index f948419c888a85905aa768f1aaeaf0c5378ca910..02a9b66b6ac38ae95aa199e8d91e7576d10daeba 100644 (file)
--- a/arch/i386/kernel/smpboot.c
+++ b/arch/i386/kernel/smpboot.c
@@ -102,6 +102,8 @@ u8 x86_cpu_to_apicid[NR_CPUS] __read_mostly =
                        { [0 ... NR_CPUS-1] = 0xff };
 EXPORT_SYMBOL(x86_cpu_to_apicid);
 
+u8 apicid_2_node[MAX_APICID];
+
 /*
  * Trampoline 80x86 program as an array.
  */
@@ -177,6 +179,9 @@ static void __devinit smp_store_cpu_info(int id)
         */
        if ((c->x86_vendor == X86_VENDOR_AMD) && (c->x86 == 6)) {
 
+               if (num_possible_cpus() == 1)
+                       goto valid_k7;
+
                /* Athlon 660/661 is valid. */  
                if ((c->x86_model==6) && ((c->x86_mask==0) || (c->x86_mask==1)))
                        goto valid_k7;
@@ -607,6 +612,7 @@ extern struct {
 /* which logical CPUs are on which nodes */
 cpumask_t node_2_cpu_mask[MAX_NUMNODES] __read_mostly =
                                { [0 ... MAX_NUMNODES-1] = CPU_MASK_NONE };
+EXPORT_SYMBOL(node_2_cpu_mask);
 /* which node each logical CPU is on */
 int cpu_2_node[NR_CPUS] __read_mostly = { [0 ... NR_CPUS-1] = 0 };
 EXPORT_SYMBOL(cpu_2_node);
@@ -642,9 +648,13 @@ static void map_cpu_to_logical_apicid(void)
 {
        int cpu = smp_processor_id();
        int apicid = logical_smp_processor_id();
+       int node = apicid_to_node(apicid);
+
+       if (!node_online(node))
+               node = first_online_node;
 
        cpu_2_logical_apicid[cpu] = apicid;
-       map_cpu_to_node(cpu, apicid_to_node(apicid));
+       map_cpu_to_node(cpu, node);
 }
 
 static void unmap_cpu_to_logical_apicid(int cpu)
@@ -947,6 +957,7 @@ static int __devinit do_boot_cpu(int apicid, int cpu)
 
        irq_ctx_init(cpu);
 
+       x86_cpu_to_apicid[cpu] = apicid;
        /*
         * This grunge runs the startup process for
         * the targeted processor.
@@ -1038,22 +1049,23 @@ void cpu_exit_clear(void)
 
 struct warm_boot_cpu_info {
        struct completion *complete;
+       struct work_struct task;
        int apicid;
        int cpu;
 };
 
-static void __cpuinit do_warm_boot_cpu(void *p)
+static void __cpuinit do_warm_boot_cpu(struct work_struct *work)
 {
-       struct warm_boot_cpu_info *info = p;
+       struct warm_boot_cpu_info *info =
+               container_of(work, struct warm_boot_cpu_info, task);
        do_boot_cpu(info->apicid, info->cpu);
        complete(info->complete);
 }
 
 static int __cpuinit __smp_prepare_cpu(int cpu)
 {
-       DECLARE_COMPLETION(done);
+       DECLARE_COMPLETION_ONSTACK(done);
        struct warm_boot_cpu_info info;
-       struct work_struct task;
        int     apicid, ret;
        struct Xgt_desc_struct *cpu_gdt_descr = &per_cpu(cpu_gdt_descr, cpu);
 
@@ -1078,7 +1090,7 @@ static int __cpuinit __smp_prepare_cpu(int cpu)
        info.complete = &done;
        info.apicid = apicid;
        info.cpu = cpu;
-       INIT_WORK(&task, do_warm_boot_cpu, &info);
+       INIT_WORK(&info.task, do_warm_boot_cpu);
 
        tsc_sync_disabled = 1;
 
@@ -1086,7 +1098,7 @@ static int __cpuinit __smp_prepare_cpu(int cpu)
        clone_pgd_range(swapper_pg_dir, swapper_pg_dir + USER_PGD_PTRS,
                        KERNEL_PGD_PTRS);
        flush_tlb_all();
-       schedule_work(&task);
+       schedule_work(&info.task);
        wait_for_completion(&done);
 
        tsc_sync_disabled = 0;
@@ -1372,7 +1384,8 @@ int __cpu_disable(void)
         */
        if (cpu == 0)
                return -EBUSY;
-
+       if (nmi_watchdog == NMI_LOCAL_APIC)
+               stop_apic_nmi_watchdog(NULL);
        clear_local_APIC();
        /* Allow any queued timer interrupts to get serviced */
        local_irq_enable();
@@ -1486,3 +1499,16 @@ void __init smp_intr_init(void)
        /* IPI for generic function call */
        set_intr_gate(CALL_FUNCTION_VECTOR, call_function_interrupt);
 }
+
+/*
+ * If the BIOS enumerates physical processors before logical,
+ * maxcpus=N at enumeration-time can be used to disable HT.
+ */
+static int __init parse_maxcpus(char *arg)
+{
+       extern unsigned int maxcpus;
+
+       maxcpus = simple_strtoul(arg, NULL, 0);
+       return 0;
+}
+early_param("maxcpus", parse_maxcpus);