[PATCH] x86_64: Move VM86 config into arch/i386/Kconfig
[linux-2.6.git] / init / main.c
index e092b19..f556fd0 100644 (file)
@@ -47,6 +47,7 @@
 #include <linux/rmap.h>
 #include <linux/mempolicy.h>
 #include <linux/key.h>
+#include <linux/unwind.h>
 
 #include <asm/io.h>
 #include <asm/bugs.h>
 #include <asm/sections.h>
 #include <asm/cacheflush.h>
 
-/*
- * This is one of the first .c files built. Error out early
- * if we have compiler trouble..
- */
-
 #ifdef CONFIG_X86_LOCAL_APIC
 #include <asm/smp.h>
 #endif
 
 /*
- * Versions of gcc older than that listed below may actually compile
- * and link okay, but the end product can have subtle run time bugs.
- * To avoid associated bogus bug reports, we flatly refuse to compile
- * with a gcc that is known to be too old from the very beginning.
+ * This is one of the first .c files built. Error out early if we have compiler
+ * trouble.
+ *
+ * Versions of gcc older than that listed below may actually compile and link
+ * okay, but the end product can have subtle run time bugs.  To avoid associated
+ * bogus bug reports, we flatly refuse to compile with a gcc that is known to be
+ * too old from the very beginning.
  */
 #if (__GNUC__ < 3) || (__GNUC__ == 3 && __GNUC_MINOR__ < 2)
 #error Sorry, your GCC is too old. It builds incorrect kernels.
@@ -308,8 +307,6 @@ static int __init rdinit_setup(char *str)
 }
 __setup("rdinit=", rdinit_setup);
 
-extern void setup_arch(char **);
-
 #ifndef CONFIG_SMP
 
 #ifdef CONFIG_X86_LOCAL_APIC
@@ -327,7 +324,7 @@ static inline void smp_prepare_cpus(unsigned int maxcpus) { }
 #else
 
 #ifdef __GENERIC_PER_CPU
-unsigned long __per_cpu_offset[NR_CPUS];
+unsigned long __per_cpu_offset[NR_CPUS] __read_mostly;
 
 EXPORT_SYMBOL(__per_cpu_offset);
 
@@ -335,6 +332,7 @@ static void __init setup_per_cpu_areas(void)
 {
        unsigned long size, i;
        char *ptr;
+       unsigned long nr_possible_cpus = num_possible_cpus();
 
        /* Copy section for each CPU (we discard the original) */
        size = ALIGN(__per_cpu_end - __per_cpu_start, SMP_CACHE_BYTES);
@@ -342,12 +340,12 @@ static void __init setup_per_cpu_areas(void)
        if (size < PERCPU_ENOUGH_ROOM)
                size = PERCPU_ENOUGH_ROOM;
 #endif
+       ptr = alloc_bootmem(size * nr_possible_cpus);
 
-       ptr = alloc_bootmem(size * NR_CPUS);
-
-       for (i = 0; i < NR_CPUS; i++, ptr += size) {
+       for_each_possible_cpu(i) {
                __per_cpu_offset[i] = ptr - __per_cpu_start;
                memcpy(ptr, __per_cpu_start, __per_cpu_end - __per_cpu_start);
+               ptr += size;
        }
 }
 #endif /* !__GENERIC_PER_CPU */
@@ -440,6 +438,15 @@ void __init parse_early_param(void)
  *     Activate the first processor.
  */
 
+static void __init boot_cpu_init(void)
+{
+       int cpu = smp_processor_id();
+       /* Mark the boot cpu "present", "online" etc for SMP and UP case */
+       cpu_set(cpu, cpu_online_map);
+       cpu_set(cpu, cpu_present_map);
+       cpu_set(cpu, cpu_possible_map);
+}
+
 asmlinkage void __init start_kernel(void)
 {
        char * command_line;
@@ -449,17 +456,13 @@ asmlinkage void __init start_kernel(void)
  * enable them
  */
        lock_kernel();
+       boot_cpu_init();
        page_address_init();
        printk(KERN_NOTICE);
        printk(linux_banner);
        setup_arch(&command_line);
        setup_per_cpu_areas();
-
-       /*
-        * Mark the boot cpu "online" so that it can call console drivers in
-        * printk() and can access its per-cpu storage.
-        */
-       smp_prepare_boot_cpu();
+       smp_prepare_boot_cpu(); /* arch-specific boot-cpu hooks */
 
        /*
         * Set up the scheduler prior starting any interrupts (such as the
@@ -480,6 +483,7 @@ asmlinkage void __init start_kernel(void)
                   __stop___param - __start___param,
                   &unknown_bootoption);
        sort_main_extable();
+       unwind_init();
        trap_init();
        rcu_init();
        init_IRQ();
@@ -567,17 +571,23 @@ static void __init do_initcalls(void)
        int count = preempt_count();
 
        for (call = __initcall_start; call < __initcall_end; call++) {
-               char *msg;
+               char *msg = NULL;
+               char msgbuf[40];
+               int result;
 
                if (initcall_debug) {
-                       printk(KERN_DEBUG "Calling initcall 0x%p", *call);
-                       print_fn_descriptor_symbol(": %s()", (unsigned long) *call);
+                       printk("Calling initcall 0x%p", *call);
+                       print_fn_descriptor_symbol(": %s()",
+                                       (unsigned long) *call);
                        printk("\n");
                }
 
-               (*call)();
+               result = (*call)();
 
-               msg = NULL;
+               if (result && result != -ENODEV && initcall_debug) {
+                       sprintf(msgbuf, "error code %d", result);
+                       msg = msgbuf;
+               }
                if (preempt_count() != count) {
                        msg = "preemption imbalance";
                        preempt_count() = count;
@@ -587,8 +597,10 @@ static void __init do_initcalls(void)
                        local_irq_enable();
                }
                if (msg) {
-                       printk(KERN_WARNING "error in initcall at 0x%p: "
-                               "returned with %s\n", *call, msg);
+                       printk(KERN_WARNING "initcall at 0x%p", *call);
+                       print_fn_descriptor_symbol(": %s()",
+                                       (unsigned long) *call);
+                       printk(": returned with %s\n", msg);
                }
        }
 
@@ -635,24 +647,6 @@ static void run_init_process(char *init_filename)
        execve(init_filename, argv_init, envp_init);
 }
 
-static inline void fixup_cpu_present_map(void)
-{
-#ifdef CONFIG_SMP
-       int i;
-
-       /*
-        * If arch is not hotplug ready and did not populate
-        * cpu_present_map, just make cpu_present_map same as cpu_possible_map
-        * for other cpu bringup code to function as normal. e.g smp_init() etc.
-        */
-       if (cpus_empty(cpu_present_map)) {
-               for_each_cpu(i) {
-                       cpu_set(i, cpu_present_map);
-               }
-       }
-#endif
-}
-
 static int init(void * unused)
 {
        lock_kernel();
@@ -670,12 +664,10 @@ static int init(void * unused)
         */
        child_reaper = current;
 
-       /* Sets up cpus_possible() */
        smp_prepare_cpus(max_cpus);
 
        do_pre_smp_initcalls();
 
-       fixup_cpu_present_map();
        smp_init();
        sched_init_smp();