Merge branch 'lro'

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

diff --git a/init/main.c b/init/main.c
index ff41006..4c194c4 100644 (file)
--- a/init/main.c
+++ b/init/main.c
@@ -47,34 +47,27 @@
 #include <linux/rmap.h>
 #include <linux/mempolicy.h>
 #include <linux/key.h>
-#include <net/sock.h>
 
 #include <asm/io.h>
 #include <asm/bugs.h>
 #include <asm/setup.h>
 #include <asm/sections.h>
-
-/*
- * This is one of the first .c files built. Error out early
- * if we have compiler trouble..
- */
-#if __GNUC__ == 2 && __GNUC_MINOR__ == 96
-#ifdef CONFIG_FRAME_POINTER
-#error This compiler cannot compile correctly with frame pointers enabled
-#endif
-#endif
+#include <asm/cacheflush.h>
 
 #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__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 95)
+#if (__GNUC__ < 3) || (__GNUC__ == 3 && __GNUC_MINOR__ < 2)
 #error Sorry, your GCC is too old. It builds incorrect kernels.
 #endif
 
@@ -100,6 +93,9 @@ extern void acpi_early_init(void);
 #else
 static inline void acpi_early_init(void) { }
 #endif
+#ifndef CONFIG_DEBUG_RODATA
+static inline void mark_rodata_ro(void) { }
+#endif
 
 #ifdef CONFIG_TC
 extern void tc_init(void);
@@ -123,6 +119,7 @@ extern void softirq_init(void);
 char saved_command_line[COMMAND_LINE_SIZE];
 
 static char *execute_command;
+static char *ramdisk_execute_command;
 
 /* Setup configured maximum number of CPUs to activate */
 static unsigned int max_cpus = NR_CPUS;
@@ -297,6 +294,18 @@ static int __init init_setup(char *str)
 }
 __setup("init=", init_setup);
 
+static int __init rdinit_setup(char *str)
+{
+       unsigned int i;
+
+       ramdisk_execute_command = str;
+       /* See "auto" comment in init_setup */
+       for (i = 1; i < MAX_INIT_ARGS; i++)
+               argv_init[i] = NULL;
+       return 1;
+}
+__setup("rdinit=", rdinit_setup);
+
 extern void setup_arch(char **);
 
 #ifndef CONFIG_SMP
@@ -381,14 +390,16 @@ static void noinline rest_init(void)
        kernel_thread(init, NULL, CLONE_FS | CLONE_SIGHAND);
        numa_default_policy();
        unlock_kernel();
-       preempt_enable_no_resched();
 
        /*
         * The boot idle thread must execute schedule()
         * at least one to get things moving:
         */
+       preempt_enable_no_resched();
        schedule();
+       preempt_disable();
 
+       /* Call into cpu_idle with preempt disabled */
        cpu_idle();
 } 
 
@@ -472,6 +483,7 @@ asmlinkage void __init start_kernel(void)
        init_IRQ();
        pidhash_init();
        init_timers();
+       hrtimers_init();
        softirq_init();
        time_init();
 
@@ -494,6 +506,7 @@ asmlinkage void __init start_kernel(void)
        }
 #endif
        vfs_caches_init_early();
+       cpuset_init_early();
        mem_init();
        kmem_cache_init();
        setup_per_cpu_pageset();
@@ -599,9 +612,6 @@ static void __init do_basic_setup(void)
        sysctl_init();
 #endif
 
-       /* Networking initialization needs a process context */ 
-       sock_init();
-
        do_initcalls();
 }
 
@@ -614,6 +624,7 @@ static void do_pre_smp_initcalls(void)
        migration_init();
 #endif
        spawn_ksoftirqd();
+       spawn_softlockup_task();
 }
 
 static void run_init_process(char *init_filename)
@@ -657,7 +668,6 @@ static int init(void * unused)
         */
        child_reaper = current;
 
-       /* Sets up cpus_possible() */
        smp_prepare_cpus(max_cpus);
 
        do_pre_smp_initcalls();
@@ -680,10 +690,14 @@ static int init(void * unused)
         * check if there is an early userspace init.  If yes, let it do all
         * the work
         */
-       if (sys_access((const char __user *) "/init", 0) == 0)
-               execute_command = "/init";
-       else
+
+       if (!ramdisk_execute_command)
+               ramdisk_execute_command = "/init";
+
+       if (sys_access((const char __user *) ramdisk_execute_command, 0) != 0) {
+               ramdisk_execute_command = NULL;
                prepare_namespace();
+       }
 
        /*
         * Ok, we have completed the initial bootup, and
@@ -692,6 +706,7 @@ static int init(void * unused)
         */
        free_initmem();
        unlock_kernel();
+       mark_rodata_ro();
        system_state = SYSTEM_RUNNING;
        numa_default_policy();
 
@@ -700,17 +715,24 @@ static int init(void * unused)
 
        (void) sys_dup(0);
        (void) sys_dup(0);
-       
+
+       if (ramdisk_execute_command) {
+               run_init_process(ramdisk_execute_command);
+               printk(KERN_WARNING "Failed to execute %s\n",
+                               ramdisk_execute_command);
+       }
+
        /*
         * We try each of these until one succeeds.
         *
         * The Bourne shell can be used instead of init if we are 
         * trying to recover a really broken machine.
         */
-
-       if (execute_command)
+       if (execute_command) {
                run_init_process(execute_command);
-
+               printk(KERN_WARNING "Failed to execute %s.  Attempting "
+                                       "defaults...\n", execute_command);
+       }
        run_init_process("/sbin/init");
        run_init_process("/etc/init");
        run_init_process("/bin/init");