Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland...

[pandora-kernel.git] / init / main.c

diff --git a/init/main.c b/init/main.c
index cc0653e..cb81ed1 100644 (file)
--- a/init/main.c
+++ b/init/main.c
@@ -39,6 +39,7 @@
 #include <linux/writeback.h>
 #include <linux/cpu.h>
 #include <linux/cpuset.h>
+#include <linux/cgroup.h>
 #include <linux/efi.h>
 #include <linux/tick.h>
 #include <linux/interrupt.h>
@@ -55,6 +56,7 @@
 #include <linux/pid_namespace.h>
 #include <linux/device.h>
 #include <linux/kthread.h>
+#include <linux/sched.h>
 
 #include <asm/io.h>
 #include <asm/bugs.h>
@@ -69,15 +71,7 @@
 /*
  * 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.
-#endif
 
 #if __GNUC__ == 4 && __GNUC_MINOR__ == 1 && __GNUC_PATCHLEVEL__ == 0
 #warning gcc-4.1.0 is known to miscompile the kernel.  A different compiler version is recommended.
@@ -134,7 +128,7 @@ static char *ramdisk_execute_command;
 
 #ifdef CONFIG_SMP
 /* Setup configured maximum number of CPUs to activate */
-static unsigned int __initdata max_cpus = NR_CPUS;
+unsigned int __initdata setup_max_cpus = NR_CPUS;
 
 /*
  * Setup routine for controlling SMP activation
@@ -152,7 +146,7 @@ static inline void disable_ioapic_setup(void) {};
 
 static int __init nosmp(char *str)
 {
-       max_cpus = 0;
+       setup_max_cpus = 0;
        disable_ioapic_setup();
        return 0;
 }
@@ -161,16 +155,16 @@ early_param("nosmp", nosmp);
 
 static int __init maxcpus(char *str)
 {
-       get_option(&str, &max_cpus);
-       if (max_cpus == 0)
+       get_option(&str, &setup_max_cpus);
+       if (setup_max_cpus == 0)
                disable_ioapic_setup();
 
        return 0;
 }
 
-early_param("maxcpus=", maxcpus);
+early_param("maxcpus", maxcpus);
 #else
-#define max_cpus NR_CPUS
+#define setup_max_cpus NR_CPUS
 #endif
 
 /*
@@ -287,7 +281,7 @@ static int __init unknown_bootoption(char *param, char *val)
                return 0;
 
        /*
-        * Preemptive maintenance for "why didn't my mispelled command
+        * Preemptive maintenance for "why didn't my misspelled command
         * line work?"
         */
        if (strchr(param, '.') && (!val || strchr(param, '.') < val)) {
@@ -324,6 +318,10 @@ static int __init unknown_bootoption(char *param, char *val)
        return 0;
 }
 
+#ifdef CONFIG_DEBUG_PAGEALLOC
+int __read_mostly debug_pagealloc_enabled = 0;
+#endif
+
 static int __init init_setup(char *str)
 {
        unsigned int i;
@@ -369,7 +367,7 @@ static inline void smp_prepare_cpus(unsigned int maxcpus) { }
 
 #else
 
-#ifdef __GENERIC_PER_CPU
+#ifndef CONFIG_HAVE_SETUP_PER_CPU_AREA
 unsigned long __per_cpu_offset[NR_CPUS] __read_mostly;
 
 EXPORT_SYMBOL(__per_cpu_offset);
@@ -390,20 +388,16 @@ static void __init setup_per_cpu_areas(void)
                ptr += size;
        }
 }
-#endif /* !__GENERIC_PER_CPU */
+#endif /* CONFIG_HAVE_SETUP_PER_CPU_AREA */
 
 /* Called by boot processor to activate the rest. */
 static void __init smp_init(void)
 {
        unsigned int cpu;
 
-#ifndef CONFIG_HOTPLUG_CPU
-       cpu_possible_map = cpu_present_map;
-#endif
-
        /* FIXME: This should be done in userspace --RR */
        for_each_present_cpu(cpu) {
-               if (num_online_cpus() >= max_cpus)
+               if (num_online_cpus() >= setup_max_cpus)
                        break;
                if (!cpu_online(cpu))
                        cpu_up(cpu);
@@ -411,7 +405,7 @@ static void __init smp_init(void)
 
        /* Any cleanup work */
        printk(KERN_INFO "Brought up %ld CPUs\n", (long)num_online_cpus());
-       smp_cpus_done(max_cpus);
+       smp_cpus_done(setup_max_cpus);
 }
 
 #endif
@@ -527,6 +521,7 @@ asmlinkage void __init start_kernel(void)
         */
        unwind_init();
        lockdep_init();
+       cgroup_init_early();
 
        local_irq_disable();
        early_boot_irqs_off();
@@ -545,10 +540,6 @@ asmlinkage void __init start_kernel(void)
        setup_arch(&command_line);
        setup_command_line(command_line);
        unwind_setup();
-#ifndef CONFIG_HOTPLUG_CPU
-       if (max_cpus < 2)
-               cpu_possible_map = cpu_online_map;
-#endif
        setup_per_cpu_areas();
        smp_prepare_boot_cpu(); /* arch-specific boot-cpu hooks */
 
@@ -565,6 +556,7 @@ asmlinkage void __init start_kernel(void)
        preempt_disable();
        build_all_zonelists();
        page_alloc_init();
+       enable_debug_pagealloc();
        printk(KERN_NOTICE "Kernel command line: %s\n", boot_command_line);
        parse_early_param();
        parse_args("Booting kernel", static_command_line, __start___param,
@@ -620,6 +612,7 @@ asmlinkage void __init start_kernel(void)
        vfs_caches_init_early();
        cpuset_init_early();
        mem_init();
+       cpu_hotplug_init();
        kmem_cache_init();
        setup_per_cpu_pageset();
        numa_policy_init();
@@ -648,6 +641,7 @@ asmlinkage void __init start_kernel(void)
 #ifdef CONFIG_PROC_FS
        proc_root_init();
 #endif
+       cgroup_init();
        cpuset_init();
        taskstats_init_early();
        delayacct_init();
@@ -760,11 +754,8 @@ __setup("nosoftlockup", nosoftlockup_setup);
 static void __init do_pre_smp_initcalls(void)
 {
        extern int spawn_ksoftirqd(void);
-#ifdef CONFIG_SMP
-       extern int migration_init(void);
 
        migration_init();
-#endif
        spawn_ksoftirqd();
        if (!nosoftlockup)
                spawn_softlockup_task();
@@ -838,7 +829,7 @@ static int __init kernel_init(void * unused)
        __set_special_pids(1, 1);
        cad_pid = task_pid(current);
 
-       smp_prepare_cpus(max_cpus);
+       smp_prepare_cpus(setup_max_cpus);
 
        do_pre_smp_initcalls();