Fix kevent's childs priority greediness
[deliverable/linux.git] / init / main.c
1 /*
2 * linux/init/main.c
3 *
4 * Copyright (C) 1991, 1992 Linus Torvalds
5 *
6 * GK 2/5/95 - Changed to support mounting root fs via NFS
7 * Added initrd & change_root: Werner Almesberger & Hans Lermen, Feb '96
8 * Moan early if gcc is old, avoiding bogus kernels - Paul Gortmaker, May '96
9 * Simplified starting of init: Michael A. Griffith <grif@acm.org>
10 */
11
12 #include <linux/types.h>
13 #include <linux/module.h>
14 #include <linux/proc_fs.h>
15 #include <linux/kernel.h>
16 #include <linux/syscalls.h>
17 #include <linux/string.h>
18 #include <linux/ctype.h>
19 #include <linux/delay.h>
20 #include <linux/utsname.h>
21 #include <linux/ioport.h>
22 #include <linux/init.h>
23 #include <linux/smp_lock.h>
24 #include <linux/initrd.h>
25 #include <linux/hdreg.h>
26 #include <linux/bootmem.h>
27 #include <linux/tty.h>
28 #include <linux/gfp.h>
29 #include <linux/percpu.h>
30 #include <linux/kmod.h>
31 #include <linux/kernel_stat.h>
32 #include <linux/start_kernel.h>
33 #include <linux/security.h>
34 #include <linux/workqueue.h>
35 #include <linux/profile.h>
36 #include <linux/rcupdate.h>
37 #include <linux/moduleparam.h>
38 #include <linux/kallsyms.h>
39 #include <linux/writeback.h>
40 #include <linux/cpu.h>
41 #include <linux/cpuset.h>
42 #include <linux/efi.h>
43 #include <linux/tick.h>
44 #include <linux/interrupt.h>
45 #include <linux/taskstats_kern.h>
46 #include <linux/delayacct.h>
47 #include <linux/unistd.h>
48 #include <linux/rmap.h>
49 #include <linux/mempolicy.h>
50 #include <linux/key.h>
51 #include <linux/unwind.h>
52 #include <linux/buffer_head.h>
53 #include <linux/debug_locks.h>
54 #include <linux/lockdep.h>
55 #include <linux/pid_namespace.h>
56 #include <linux/device.h>
57
58 #include <asm/io.h>
59 #include <asm/bugs.h>
60 #include <asm/setup.h>
61 #include <asm/sections.h>
62 #include <asm/cacheflush.h>
63
64 #ifdef CONFIG_X86_LOCAL_APIC
65 #include <asm/smp.h>
66 #endif
67
68 /*
69 * This is one of the first .c files built. Error out early if we have compiler
70 * trouble.
71 *
72 * Versions of gcc older than that listed below may actually compile and link
73 * okay, but the end product can have subtle run time bugs. To avoid associated
74 * bogus bug reports, we flatly refuse to compile with a gcc that is known to be
75 * too old from the very beginning.
76 */
77 #if (__GNUC__ < 3) || (__GNUC__ == 3 && __GNUC_MINOR__ < 2)
78 #error Sorry, your GCC is too old. It builds incorrect kernels.
79 #endif
80
81 #if __GNUC__ == 4 && __GNUC_MINOR__ == 1 && __GNUC_PATCHLEVEL__ == 0
82 #warning gcc-4.1.0 is known to miscompile the kernel. A different compiler version is recommended.
83 #endif
84
85 static int kernel_init(void *);
86
87 extern void init_IRQ(void);
88 extern void fork_init(unsigned long);
89 extern void mca_init(void);
90 extern void sbus_init(void);
91 extern void signals_init(void);
92 extern void pidhash_init(void);
93 extern void pidmap_init(void);
94 extern void prio_tree_init(void);
95 extern void radix_tree_init(void);
96 extern void free_initmem(void);
97 #ifdef CONFIG_ACPI
98 extern void acpi_early_init(void);
99 #else
100 static inline void acpi_early_init(void) { }
101 #endif
102 #ifndef CONFIG_DEBUG_RODATA
103 static inline void mark_rodata_ro(void) { }
104 #endif
105
106 #ifdef CONFIG_TC
107 extern void tc_init(void);
108 #endif
109
110 enum system_states system_state;
111 EXPORT_SYMBOL(system_state);
112
113 /*
114 * Boot command-line arguments
115 */
116 #define MAX_INIT_ARGS CONFIG_INIT_ENV_ARG_LIMIT
117 #define MAX_INIT_ENVS CONFIG_INIT_ENV_ARG_LIMIT
118
119 extern void time_init(void);
120 /* Default late time init is NULL. archs can override this later. */
121 void (*late_time_init)(void);
122 extern void softirq_init(void);
123
124 /* Untouched command line saved by arch-specific code. */
125 char __initdata boot_command_line[COMMAND_LINE_SIZE];
126 /* Untouched saved command line (eg. for /proc) */
127 char *saved_command_line;
128 /* Command line for parameter parsing */
129 static char *static_command_line;
130
131 static char *execute_command;
132 static char *ramdisk_execute_command;
133
134 /* Setup configured maximum number of CPUs to activate */
135 static unsigned int max_cpus = NR_CPUS;
136
137 /*
138 * If set, this is an indication to the drivers that reset the underlying
139 * device before going ahead with the initialization otherwise driver might
140 * rely on the BIOS and skip the reset operation.
141 *
142 * This is useful if kernel is booting in an unreliable environment.
143 * For ex. kdump situaiton where previous kernel has crashed, BIOS has been
144 * skipped and devices will be in unknown state.
145 */
146 unsigned int reset_devices;
147 EXPORT_SYMBOL(reset_devices);
148
149 /*
150 * Setup routine for controlling SMP activation
151 *
152 * Command-line option of "nosmp" or "maxcpus=0" will disable SMP
153 * activation entirely (the MPS table probe still happens, though).
154 *
155 * Command-line option of "maxcpus=<NUM>", where <NUM> is an integer
156 * greater than 0, limits the maximum number of CPUs activated in
157 * SMP mode to <NUM>.
158 */
159 static int __init nosmp(char *str)
160 {
161 max_cpus = 0;
162 return 1;
163 }
164
165 __setup("nosmp", nosmp);
166
167 static int __init maxcpus(char *str)
168 {
169 get_option(&str, &max_cpus);
170 return 1;
171 }
172
173 __setup("maxcpus=", maxcpus);
174
175 static int __init set_reset_devices(char *str)
176 {
177 reset_devices = 1;
178 return 1;
179 }
180
181 __setup("reset_devices", set_reset_devices);
182
183 static char * argv_init[MAX_INIT_ARGS+2] = { "init", NULL, };
184 char * envp_init[MAX_INIT_ENVS+2] = { "HOME=/", "TERM=linux", NULL, };
185 static const char *panic_later, *panic_param;
186
187 extern struct obs_kernel_param __setup_start[], __setup_end[];
188
189 static int __init obsolete_checksetup(char *line)
190 {
191 struct obs_kernel_param *p;
192 int had_early_param = 0;
193
194 p = __setup_start;
195 do {
196 int n = strlen(p->str);
197 if (!strncmp(line, p->str, n)) {
198 if (p->early) {
199 /* Already done in parse_early_param?
200 * (Needs exact match on param part).
201 * Keep iterating, as we can have early
202 * params and __setups of same names 8( */
203 if (line[n] == '\0' || line[n] == '=')
204 had_early_param = 1;
205 } else if (!p->setup_func) {
206 printk(KERN_WARNING "Parameter %s is obsolete,"
207 " ignored\n", p->str);
208 return 1;
209 } else if (p->setup_func(line + n))
210 return 1;
211 }
212 p++;
213 } while (p < __setup_end);
214
215 return had_early_param;
216 }
217
218 /*
219 * This should be approx 2 Bo*oMips to start (note initial shift), and will
220 * still work even if initially too large, it will just take slightly longer
221 */
222 unsigned long loops_per_jiffy = (1<<12);
223
224 EXPORT_SYMBOL(loops_per_jiffy);
225
226 static int __init debug_kernel(char *str)
227 {
228 if (*str)
229 return 0;
230 console_loglevel = 10;
231 return 1;
232 }
233
234 static int __init quiet_kernel(char *str)
235 {
236 if (*str)
237 return 0;
238 console_loglevel = 4;
239 return 1;
240 }
241
242 __setup("debug", debug_kernel);
243 __setup("quiet", quiet_kernel);
244
245 static int __init loglevel(char *str)
246 {
247 get_option(&str, &console_loglevel);
248 return 1;
249 }
250
251 __setup("loglevel=", loglevel);
252
253 /*
254 * Unknown boot options get handed to init, unless they look like
255 * failed parameters
256 */
257 static int __init unknown_bootoption(char *param, char *val)
258 {
259 /* Change NUL term back to "=", to make "param" the whole string. */
260 if (val) {
261 /* param=val or param="val"? */
262 if (val == param+strlen(param)+1)
263 val[-1] = '=';
264 else if (val == param+strlen(param)+2) {
265 val[-2] = '=';
266 memmove(val-1, val, strlen(val)+1);
267 val--;
268 } else
269 BUG();
270 }
271
272 /* Handle obsolete-style parameters */
273 if (obsolete_checksetup(param))
274 return 0;
275
276 /*
277 * Preemptive maintenance for "why didn't my mispelled command
278 * line work?"
279 */
280 if (strchr(param, '.') && (!val || strchr(param, '.') < val)) {
281 printk(KERN_ERR "Unknown boot option `%s': ignoring\n", param);
282 return 0;
283 }
284
285 if (panic_later)
286 return 0;
287
288 if (val) {
289 /* Environment option */
290 unsigned int i;
291 for (i = 0; envp_init[i]; i++) {
292 if (i == MAX_INIT_ENVS) {
293 panic_later = "Too many boot env vars at `%s'";
294 panic_param = param;
295 }
296 if (!strncmp(param, envp_init[i], val - param))
297 break;
298 }
299 envp_init[i] = param;
300 } else {
301 /* Command line option */
302 unsigned int i;
303 for (i = 0; argv_init[i]; i++) {
304 if (i == MAX_INIT_ARGS) {
305 panic_later = "Too many boot init vars at `%s'";
306 panic_param = param;
307 }
308 }
309 argv_init[i] = param;
310 }
311 return 0;
312 }
313
314 static int __init init_setup(char *str)
315 {
316 unsigned int i;
317
318 execute_command = str;
319 /*
320 * In case LILO is going to boot us with default command line,
321 * it prepends "auto" before the whole cmdline which makes
322 * the shell think it should execute a script with such name.
323 * So we ignore all arguments entered _before_ init=... [MJ]
324 */
325 for (i = 1; i < MAX_INIT_ARGS; i++)
326 argv_init[i] = NULL;
327 return 1;
328 }
329 __setup("init=", init_setup);
330
331 static int __init rdinit_setup(char *str)
332 {
333 unsigned int i;
334
335 ramdisk_execute_command = str;
336 /* See "auto" comment in init_setup */
337 for (i = 1; i < MAX_INIT_ARGS; i++)
338 argv_init[i] = NULL;
339 return 1;
340 }
341 __setup("rdinit=", rdinit_setup);
342
343 #ifndef CONFIG_SMP
344
345 #ifdef CONFIG_X86_LOCAL_APIC
346 static void __init smp_init(void)
347 {
348 APIC_init_uniprocessor();
349 }
350 #else
351 #define smp_init() do { } while (0)
352 #endif
353
354 static inline void setup_per_cpu_areas(void) { }
355 static inline void smp_prepare_cpus(unsigned int maxcpus) { }
356
357 #else
358
359 #ifdef __GENERIC_PER_CPU
360 unsigned long __per_cpu_offset[NR_CPUS] __read_mostly;
361
362 EXPORT_SYMBOL(__per_cpu_offset);
363
364 static void __init setup_per_cpu_areas(void)
365 {
366 unsigned long size, i;
367 char *ptr;
368 unsigned long nr_possible_cpus = num_possible_cpus();
369
370 /* Copy section for each CPU (we discard the original) */
371 size = ALIGN(PERCPU_ENOUGH_ROOM, PAGE_SIZE);
372 ptr = alloc_bootmem_pages(size * nr_possible_cpus);
373
374 for_each_possible_cpu(i) {
375 __per_cpu_offset[i] = ptr - __per_cpu_start;
376 memcpy(ptr, __per_cpu_start, __per_cpu_end - __per_cpu_start);
377 ptr += size;
378 }
379 }
380 #endif /* !__GENERIC_PER_CPU */
381
382 /* Called by boot processor to activate the rest. */
383 static void __init smp_init(void)
384 {
385 unsigned int cpu;
386
387 /* FIXME: This should be done in userspace --RR */
388 for_each_present_cpu(cpu) {
389 if (num_online_cpus() >= max_cpus)
390 break;
391 if (!cpu_online(cpu))
392 cpu_up(cpu);
393 }
394
395 /* Any cleanup work */
396 printk(KERN_INFO "Brought up %ld CPUs\n", (long)num_online_cpus());
397 smp_cpus_done(max_cpus);
398 }
399
400 #endif
401
402 /*
403 * We need to store the untouched command line for future reference.
404 * We also need to store the touched command line since the parameter
405 * parsing is performed in place, and we should allow a component to
406 * store reference of name/value for future reference.
407 */
408 static void __init setup_command_line(char *command_line)
409 {
410 saved_command_line = alloc_bootmem(strlen (boot_command_line)+1);
411 static_command_line = alloc_bootmem(strlen (command_line)+1);
412 strcpy (saved_command_line, boot_command_line);
413 strcpy (static_command_line, command_line);
414 }
415
416 /*
417 * We need to finalize in a non-__init function or else race conditions
418 * between the root thread and the init thread may cause start_kernel to
419 * be reaped by free_initmem before the root thread has proceeded to
420 * cpu_idle.
421 *
422 * gcc-3.4 accidentally inlines this function, so use noinline.
423 */
424
425 static void noinline rest_init(void)
426 __releases(kernel_lock)
427 {
428 kernel_thread(kernel_init, NULL, CLONE_FS | CLONE_SIGHAND);
429 numa_default_policy();
430 unlock_kernel();
431
432 /*
433 * The boot idle thread must execute schedule()
434 * at least one to get things moving:
435 */
436 preempt_enable_no_resched();
437 schedule();
438 preempt_disable();
439
440 /* Call into cpu_idle with preempt disabled */
441 cpu_idle();
442 }
443
444 /* Check for early params. */
445 static int __init do_early_param(char *param, char *val)
446 {
447 struct obs_kernel_param *p;
448
449 for (p = __setup_start; p < __setup_end; p++) {
450 if (p->early && strcmp(param, p->str) == 0) {
451 if (p->setup_func(val) != 0)
452 printk(KERN_WARNING
453 "Malformed early option '%s'\n", param);
454 }
455 }
456 /* We accept everything at this stage. */
457 return 0;
458 }
459
460 /* Arch code calls this early on, or if not, just before other parsing. */
461 void __init parse_early_param(void)
462 {
463 static __initdata int done = 0;
464 static __initdata char tmp_cmdline[COMMAND_LINE_SIZE];
465
466 if (done)
467 return;
468
469 /* All fall through to do_early_param. */
470 strlcpy(tmp_cmdline, boot_command_line, COMMAND_LINE_SIZE);
471 parse_args("early options", tmp_cmdline, NULL, 0, do_early_param);
472 done = 1;
473 }
474
475 /*
476 * Activate the first processor.
477 */
478
479 static void __init boot_cpu_init(void)
480 {
481 int cpu = smp_processor_id();
482 /* Mark the boot cpu "present", "online" etc for SMP and UP case */
483 cpu_set(cpu, cpu_online_map);
484 cpu_set(cpu, cpu_present_map);
485 cpu_set(cpu, cpu_possible_map);
486 }
487
488 void __init __attribute__((weak)) smp_setup_processor_id(void)
489 {
490 }
491
492 asmlinkage void __init start_kernel(void)
493 {
494 char * command_line;
495 extern struct kernel_param __start___param[], __stop___param[];
496
497 smp_setup_processor_id();
498
499 /*
500 * Need to run as early as possible, to initialize the
501 * lockdep hash:
502 */
503 unwind_init();
504 lockdep_init();
505
506 local_irq_disable();
507 early_boot_irqs_off();
508 early_init_irq_lock_class();
509
510 /*
511 * Interrupts are still disabled. Do necessary setups, then
512 * enable them
513 */
514 lock_kernel();
515 tick_init();
516 boot_cpu_init();
517 page_address_init();
518 printk(KERN_NOTICE);
519 printk(linux_banner);
520 setup_arch(&command_line);
521 setup_command_line(command_line);
522 unwind_setup();
523 setup_per_cpu_areas();
524 smp_prepare_boot_cpu(); /* arch-specific boot-cpu hooks */
525
526 /*
527 * Set up the scheduler prior starting any interrupts (such as the
528 * timer interrupt). Full topology setup happens at smp_init()
529 * time - but meanwhile we still have a functioning scheduler.
530 */
531 sched_init();
532 /*
533 * Disable preemption - early bootup scheduling is extremely
534 * fragile until we cpu_idle() for the first time.
535 */
536 preempt_disable();
537 build_all_zonelists();
538 page_alloc_init();
539 printk(KERN_NOTICE "Kernel command line: %s\n", boot_command_line);
540 parse_early_param();
541 parse_args("Booting kernel", static_command_line, __start___param,
542 __stop___param - __start___param,
543 &unknown_bootoption);
544 if (!irqs_disabled()) {
545 printk(KERN_WARNING "start_kernel(): bug: interrupts were "
546 "enabled *very* early, fixing it\n");
547 local_irq_disable();
548 }
549 sort_main_extable();
550 trap_init();
551 rcu_init();
552 init_IRQ();
553 pidhash_init();
554 init_timers();
555 hrtimers_init();
556 softirq_init();
557 timekeeping_init();
558 time_init();
559 profile_init();
560 if (!irqs_disabled())
561 printk("start_kernel(): bug: interrupts were enabled early\n");
562 early_boot_irqs_on();
563 local_irq_enable();
564
565 /*
566 * HACK ALERT! This is early. We're enabling the console before
567 * we've done PCI setups etc, and console_init() must be aware of
568 * this. But we do want output early, in case something goes wrong.
569 */
570 console_init();
571 if (panic_later)
572 panic(panic_later, panic_param);
573
574 lockdep_info();
575
576 /*
577 * Need to run this when irqs are enabled, because it wants
578 * to self-test [hard/soft]-irqs on/off lock inversion bugs
579 * too:
580 */
581 locking_selftest();
582
583 #ifdef CONFIG_BLK_DEV_INITRD
584 if (initrd_start && !initrd_below_start_ok &&
585 initrd_start < min_low_pfn << PAGE_SHIFT) {
586 printk(KERN_CRIT "initrd overwritten (0x%08lx < 0x%08lx) - "
587 "disabling it.\n",initrd_start,min_low_pfn << PAGE_SHIFT);
588 initrd_start = 0;
589 }
590 #endif
591 vfs_caches_init_early();
592 cpuset_init_early();
593 mem_init();
594 kmem_cache_init();
595 setup_per_cpu_pageset();
596 numa_policy_init();
597 if (late_time_init)
598 late_time_init();
599 calibrate_delay();
600 pidmap_init();
601 pgtable_cache_init();
602 prio_tree_init();
603 anon_vma_init();
604 #ifdef CONFIG_X86
605 if (efi_enabled)
606 efi_enter_virtual_mode();
607 #endif
608 fork_init(num_physpages);
609 proc_caches_init();
610 buffer_init();
611 unnamed_dev_init();
612 key_init();
613 security_init();
614 vfs_caches_init(num_physpages);
615 radix_tree_init();
616 signals_init();
617 /* rootfs populating might need page-writeback */
618 page_writeback_init();
619 #ifdef CONFIG_PROC_FS
620 proc_root_init();
621 #endif
622 cpuset_init();
623 taskstats_init_early();
624 delayacct_init();
625
626 check_bugs();
627
628 acpi_early_init(); /* before LAPIC and SMP init */
629
630 /* Do the rest non-__init'ed, we're now alive */
631 rest_init();
632 }
633
634 static int __initdata initcall_debug;
635
636 static int __init initcall_debug_setup(char *str)
637 {
638 initcall_debug = 1;
639 return 1;
640 }
641 __setup("initcall_debug", initcall_debug_setup);
642
643 extern initcall_t __initcall_start[], __initcall_end[];
644
645 static void __init do_initcalls(void)
646 {
647 initcall_t *call;
648 int count = preempt_count();
649
650 for (call = __initcall_start; call < __initcall_end; call++) {
651 char *msg = NULL;
652 char msgbuf[40];
653 int result;
654
655 if (initcall_debug) {
656 printk("Calling initcall 0x%p", *call);
657 print_fn_descriptor_symbol(": %s()",
658 (unsigned long) *call);
659 printk("\n");
660 }
661
662 result = (*call)();
663
664 if (result && result != -ENODEV && initcall_debug) {
665 sprintf(msgbuf, "error code %d", result);
666 msg = msgbuf;
667 }
668 if (preempt_count() != count) {
669 msg = "preemption imbalance";
670 preempt_count() = count;
671 }
672 if (irqs_disabled()) {
673 msg = "disabled interrupts";
674 local_irq_enable();
675 }
676 if (msg) {
677 printk(KERN_WARNING "initcall at 0x%p", *call);
678 print_fn_descriptor_symbol(": %s()",
679 (unsigned long) *call);
680 printk(": returned with %s\n", msg);
681 }
682 }
683
684 /* Make sure there is no pending stuff from the initcall sequence */
685 flush_scheduled_work();
686 }
687
688 /*
689 * Ok, the machine is now initialized. None of the devices
690 * have been touched yet, but the CPU subsystem is up and
691 * running, and memory and process management works.
692 *
693 * Now we can finally start doing some real work..
694 */
695 static void __init do_basic_setup(void)
696 {
697 /* drivers will send hotplug events */
698 init_workqueues();
699 usermodehelper_init();
700 driver_init();
701 init_irq_proc();
702 do_initcalls();
703 }
704
705 static void __init do_pre_smp_initcalls(void)
706 {
707 extern int spawn_ksoftirqd(void);
708 #ifdef CONFIG_SMP
709 extern int migration_init(void);
710
711 migration_init();
712 #endif
713 spawn_ksoftirqd();
714 spawn_softlockup_task();
715 }
716
717 static void run_init_process(char *init_filename)
718 {
719 argv_init[0] = init_filename;
720 kernel_execve(init_filename, argv_init, envp_init);
721 }
722
723 /* This is a non __init function. Force it to be noinline otherwise gcc
724 * makes it inline to init() and it becomes part of init.text section
725 */
726 static int noinline init_post(void)
727 {
728 free_initmem();
729 unlock_kernel();
730 mark_rodata_ro();
731 system_state = SYSTEM_RUNNING;
732 numa_default_policy();
733
734 if (sys_open((const char __user *) "/dev/console", O_RDWR, 0) < 0)
735 printk(KERN_WARNING "Warning: unable to open an initial console.\n");
736
737 (void) sys_dup(0);
738 (void) sys_dup(0);
739
740 if (ramdisk_execute_command) {
741 run_init_process(ramdisk_execute_command);
742 printk(KERN_WARNING "Failed to execute %s\n",
743 ramdisk_execute_command);
744 }
745
746 /*
747 * We try each of these until one succeeds.
748 *
749 * The Bourne shell can be used instead of init if we are
750 * trying to recover a really broken machine.
751 */
752 if (execute_command) {
753 run_init_process(execute_command);
754 printk(KERN_WARNING "Failed to execute %s. Attempting "
755 "defaults...\n", execute_command);
756 }
757 run_init_process("/sbin/init");
758 run_init_process("/etc/init");
759 run_init_process("/bin/init");
760 run_init_process("/bin/sh");
761
762 panic("No init found. Try passing init= option to kernel.");
763 }
764
765 static int __init kernel_init(void * unused)
766 {
767 lock_kernel();
768 /*
769 * init can run on any cpu.
770 */
771 set_cpus_allowed(current, CPU_MASK_ALL);
772 /*
773 * Tell the world that we're going to be the grim
774 * reaper of innocent orphaned children.
775 *
776 * We don't want people to have to make incorrect
777 * assumptions about where in the task array this
778 * can be found.
779 */
780 init_pid_ns.child_reaper = current;
781
782 cad_pid = task_pid(current);
783
784 smp_prepare_cpus(max_cpus);
785
786 do_pre_smp_initcalls();
787
788 smp_init();
789 sched_init_smp();
790
791 cpuset_init_smp();
792
793 do_basic_setup();
794
795 /*
796 * check if there is an early userspace init. If yes, let it do all
797 * the work
798 */
799
800 if (!ramdisk_execute_command)
801 ramdisk_execute_command = "/init";
802
803 if (sys_access((const char __user *) ramdisk_execute_command, 0) != 0) {
804 ramdisk_execute_command = NULL;
805 prepare_namespace();
806 }
807
808 /*
809 * Ok, we have completed the initial bootup, and
810 * we're essentially up and running. Get rid of the
811 * initmem segments and start the user-mode stuff..
812 */
813 init_post();
814 return 0;
815 }
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