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-rw-r--r--init/main.c88
1 files changed, 49 insertions, 39 deletions
diff --git a/init/main.c b/init/main.c
index 4e9e92bb2b89..953500b02ac4 100644
--- a/init/main.c
+++ b/init/main.c
@@ -40,6 +40,7 @@
40#include <linux/cpu.h> 40#include <linux/cpu.h>
41#include <linux/cpuset.h> 41#include <linux/cpuset.h>
42#include <linux/efi.h> 42#include <linux/efi.h>
43#include <linux/tick.h>
43#include <linux/taskstats_kern.h> 44#include <linux/taskstats_kern.h>
44#include <linux/delayacct.h> 45#include <linux/delayacct.h>
45#include <linux/unistd.h> 46#include <linux/unistd.h>
@@ -86,7 +87,6 @@ extern void init_IRQ(void);
86extern void fork_init(unsigned long); 87extern void fork_init(unsigned long);
87extern void mca_init(void); 88extern void mca_init(void);
88extern void sbus_init(void); 89extern void sbus_init(void);
89extern void sysctl_init(void);
90extern void signals_init(void); 90extern void signals_init(void);
91extern void pidhash_init(void); 91extern void pidhash_init(void);
92extern void pidmap_init(void); 92extern void pidmap_init(void);
@@ -516,6 +516,7 @@ asmlinkage void __init start_kernel(void)
516 * enable them 516 * enable them
517 */ 517 */
518 lock_kernel(); 518 lock_kernel();
519 tick_init();
519 boot_cpu_init(); 520 boot_cpu_init();
520 page_address_init(); 521 page_address_init();
521 printk(KERN_NOTICE); 522 printk(KERN_NOTICE);
@@ -702,8 +703,8 @@ static void __init do_basic_setup(void)
702 usermodehelper_init(); 703 usermodehelper_init();
703 driver_init(); 704 driver_init();
704 705
705#ifdef CONFIG_SYSCTL 706#ifdef CONFIG_PROC_FS
706 sysctl_init(); 707 init_irq_proc();
707#endif 708#endif
708 709
709 do_initcalls(); 710 do_initcalls();
@@ -727,7 +728,49 @@ static void run_init_process(char *init_filename)
727 kernel_execve(init_filename, argv_init, envp_init); 728 kernel_execve(init_filename, argv_init, envp_init);
728} 729}
729 730
730static int init(void * unused) 731/* This is a non __init function. Force it to be noinline otherwise gcc
732 * makes it inline to init() and it becomes part of init.text section
733 */
734static int noinline init_post(void)
735{
736 free_initmem();
737 unlock_kernel();
738 mark_rodata_ro();
739 system_state = SYSTEM_RUNNING;
740 numa_default_policy();
741
742 if (sys_open((const char __user *) "/dev/console", O_RDWR, 0) < 0)
743 printk(KERN_WARNING "Warning: unable to open an initial console.\n");
744
745 (void) sys_dup(0);
746 (void) sys_dup(0);
747
748 if (ramdisk_execute_command) {
749 run_init_process(ramdisk_execute_command);
750 printk(KERN_WARNING "Failed to execute %s\n",
751 ramdisk_execute_command);
752 }
753
754 /*
755 * We try each of these until one succeeds.
756 *
757 * The Bourne shell can be used instead of init if we are
758 * trying to recover a really broken machine.
759 */
760 if (execute_command) {
761 run_init_process(execute_command);
762 printk(KERN_WARNING "Failed to execute %s. Attempting "
763 "defaults...\n", execute_command);
764 }
765 run_init_process("/sbin/init");
766 run_init_process("/etc/init");
767 run_init_process("/bin/init");
768 run_init_process("/bin/sh");
769
770 panic("No init found. Try passing init= option to kernel.");
771}
772
773static int __init init(void * unused)
731{ 774{
732 lock_kernel(); 775 lock_kernel();
733 /* 776 /*
@@ -775,39 +818,6 @@ static int init(void * unused)
775 * we're essentially up and running. Get rid of the 818 * we're essentially up and running. Get rid of the
776 * initmem segments and start the user-mode stuff.. 819 * initmem segments and start the user-mode stuff..
777 */ 820 */
778 free_initmem(); 821 init_post();
779 unlock_kernel(); 822 return 0;
780 mark_rodata_ro();
781 system_state = SYSTEM_RUNNING;
782 numa_default_policy();
783
784 if (sys_open((const char __user *) "/dev/console", O_RDWR, 0) < 0)
785 printk(KERN_WARNING "Warning: unable to open an initial console.\n");
786
787 (void) sys_dup(0);
788 (void) sys_dup(0);
789
790 if (ramdisk_execute_command) {
791 run_init_process(ramdisk_execute_command);
792 printk(KERN_WARNING "Failed to execute %s\n",
793 ramdisk_execute_command);
794 }
795
796 /*
797 * We try each of these until one succeeds.
798 *
799 * The Bourne shell can be used instead of init if we are
800 * trying to recover a really broken machine.
801 */
802 if (execute_command) {
803 run_init_process(execute_command);
804 printk(KERN_WARNING "Failed to execute %s. Attempting "
805 "defaults...\n", execute_command);
806 }
807 run_init_process("/sbin/init");
808 run_init_process("/etc/init");
809 run_init_process("/bin/init");
810 run_init_process("/bin/sh");
811
812 panic("No init found. Try passing init= option to kernel.");
813} 823}