4 * Copyright (C) 1991, 1992 Linus Torvalds
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>
12 #define DEBUG /* Enable initcall_debug */
14 #include <linux/types.h>
15 #include <linux/module.h>
16 #include <linux/proc_fs.h>
17 #include <linux/kernel.h>
18 #include <linux/syscalls.h>
19 #include <linux/stackprotector.h>
20 #include <linux/string.h>
21 #include <linux/ctype.h>
22 #include <linux/delay.h>
23 #include <linux/ioport.h>
24 #include <linux/init.h>
25 #include <linux/initrd.h>
26 #include <linux/bootmem.h>
27 #include <linux/acpi.h>
28 #include <linux/tty.h>
29 #include <linux/percpu.h>
30 #include <linux/kmod.h>
31 #include <linux/vmalloc.h>
32 #include <linux/kernel_stat.h>
33 #include <linux/start_kernel.h>
34 #include <linux/security.h>
35 #include <linux/smp.h>
36 #include <linux/profile.h>
37 #include <linux/rcupdate.h>
38 #include <linux/moduleparam.h>
39 #include <linux/kallsyms.h>
40 #include <linux/writeback.h>
41 #include <linux/cpu.h>
42 #include <linux/cpuset.h>
43 #include <linux/cgroup.h>
44 #include <linux/efi.h>
45 #include <linux/tick.h>
46 #include <linux/interrupt.h>
47 #include <linux/taskstats_kern.h>
48 #include <linux/delayacct.h>
49 #include <linux/unistd.h>
50 #include <linux/rmap.h>
51 #include <linux/mempolicy.h>
52 #include <linux/key.h>
53 #include <linux/buffer_head.h>
54 #include <linux/page_ext.h>
55 #include <linux/debug_locks.h>
56 #include <linux/debugobjects.h>
57 #include <linux/lockdep.h>
58 #include <linux/kmemleak.h>
59 #include <linux/pid_namespace.h>
60 #include <linux/device.h>
61 #include <linux/kthread.h>
62 #include <linux/sched.h>
63 #include <linux/signal.h>
64 #include <linux/idr.h>
65 #include <linux/kgdb.h>
66 #include <linux/ftrace.h>
67 #include <linux/async.h>
68 #include <linux/kmemcheck.h>
69 #include <linux/sfi.h>
70 #include <linux/shmem_fs.h>
71 #include <linux/slab.h>
72 #include <linux/perf_event.h>
73 #include <linux/file.h>
74 #include <linux/ptrace.h>
75 #include <linux/blkdev.h>
76 #include <linux/elevator.h>
77 #include <linux/sched_clock.h>
78 #include <linux/context_tracking.h>
79 #include <linux/random.h>
80 #include <linux/list.h>
81 #include <linux/integrity.h>
82 #include <linux/proc_ns.h>
87 #include <asm/setup.h>
88 #include <asm/sections.h>
89 #include <asm/cacheflush.h>
91 static int kernel_init(void *);
93 extern void init_IRQ(void);
94 extern void fork_init(void);
95 extern void radix_tree_init(void);
98 * Debug helper: via this flag we know that we are in 'early bootup code'
99 * where only the boot processor is running with IRQ disabled. This means
100 * two things - IRQ must not be enabled before the flag is cleared and some
101 * operations which are not allowed with IRQ disabled are allowed while the
104 bool early_boot_irqs_disabled __read_mostly
;
106 enum system_states system_state __read_mostly
;
107 EXPORT_SYMBOL(system_state
);
110 * Boot command-line arguments
112 #define MAX_INIT_ARGS CONFIG_INIT_ENV_ARG_LIMIT
113 #define MAX_INIT_ENVS CONFIG_INIT_ENV_ARG_LIMIT
115 extern void time_init(void);
116 /* Default late time init is NULL. archs can override this later. */
117 void (*__initdata late_time_init
)(void);
119 /* Untouched command line saved by arch-specific code. */
120 char __initdata boot_command_line
[COMMAND_LINE_SIZE
];
121 /* Untouched saved command line (eg. for /proc) */
122 char *saved_command_line
;
123 /* Command line for parameter parsing */
124 static char *static_command_line
;
125 /* Command line for per-initcall parameter parsing */
126 static char *initcall_command_line
;
128 static char *execute_command
;
129 static char *ramdisk_execute_command
;
132 * Used to generate warnings if static_key manipulation functions are used
133 * before jump_label_init is called.
135 bool static_key_initialized __read_mostly
;
136 EXPORT_SYMBOL_GPL(static_key_initialized
);
139 * If set, this is an indication to the drivers that reset the underlying
140 * device before going ahead with the initialization otherwise driver might
141 * rely on the BIOS and skip the reset operation.
143 * This is useful if kernel is booting in an unreliable environment.
144 * For ex. kdump situation where previous kernel has crashed, BIOS has been
145 * skipped and devices will be in unknown state.
147 unsigned int reset_devices
;
148 EXPORT_SYMBOL(reset_devices
);
150 static int __init
set_reset_devices(char *str
)
156 __setup("reset_devices", set_reset_devices
);
158 static const char *argv_init
[MAX_INIT_ARGS
+2] = { "init", NULL
, };
159 const char *envp_init
[MAX_INIT_ENVS
+2] = { "HOME=/", "TERM=linux", NULL
, };
160 static const char *panic_later
, *panic_param
;
162 extern const struct obs_kernel_param __setup_start
[], __setup_end
[];
164 static bool __init
obsolete_checksetup(char *line
)
166 const struct obs_kernel_param
*p
;
167 bool had_early_param
= false;
171 int n
= strlen(p
->str
);
172 if (parameqn(line
, p
->str
, n
)) {
174 /* Already done in parse_early_param?
175 * (Needs exact match on param part).
176 * Keep iterating, as we can have early
177 * params and __setups of same names 8( */
178 if (line
[n
] == '\0' || line
[n
] == '=')
179 had_early_param
= true;
180 } else if (!p
->setup_func
) {
181 pr_warn("Parameter %s is obsolete, ignored\n",
184 } else if (p
->setup_func(line
+ n
))
188 } while (p
< __setup_end
);
190 return had_early_param
;
194 * This should be approx 2 Bo*oMips to start (note initial shift), and will
195 * still work even if initially too large, it will just take slightly longer
197 unsigned long loops_per_jiffy
= (1<<12);
198 EXPORT_SYMBOL(loops_per_jiffy
);
200 static int __init
debug_kernel(char *str
)
202 console_loglevel
= CONSOLE_LOGLEVEL_DEBUG
;
206 static int __init
quiet_kernel(char *str
)
208 console_loglevel
= CONSOLE_LOGLEVEL_QUIET
;
212 early_param("debug", debug_kernel
);
213 early_param("quiet", quiet_kernel
);
215 static int __init
loglevel(char *str
)
220 * Only update loglevel value when a correct setting was passed,
221 * to prevent blind crashes (when loglevel being set to 0) that
222 * are quite hard to debug
224 if (get_option(&str
, &newlevel
)) {
225 console_loglevel
= newlevel
;
232 early_param("loglevel", loglevel
);
234 /* Change NUL term back to "=", to make "param" the whole string. */
235 static int __init
repair_env_string(char *param
, char *val
,
236 const char *unused
, void *arg
)
239 /* param=val or param="val"? */
240 if (val
== param
+strlen(param
)+1)
242 else if (val
== param
+strlen(param
)+2) {
244 memmove(val
-1, val
, strlen(val
)+1);
252 /* Anything after -- gets handed straight to init. */
253 static int __init
set_init_arg(char *param
, char *val
,
254 const char *unused
, void *arg
)
261 repair_env_string(param
, val
, unused
, NULL
);
263 for (i
= 0; argv_init
[i
]; i
++) {
264 if (i
== MAX_INIT_ARGS
) {
265 panic_later
= "init";
270 argv_init
[i
] = param
;
275 * Unknown boot options get handed to init, unless they look like
276 * unused parameters (modprobe will find them in /proc/cmdline).
278 static int __init
unknown_bootoption(char *param
, char *val
,
279 const char *unused
, void *arg
)
281 repair_env_string(param
, val
, unused
, NULL
);
283 /* Handle obsolete-style parameters */
284 if (obsolete_checksetup(param
))
287 /* Unused module parameter. */
288 if (strchr(param
, '.') && (!val
|| strchr(param
, '.') < val
))
295 /* Environment option */
297 for (i
= 0; envp_init
[i
]; i
++) {
298 if (i
== MAX_INIT_ENVS
) {
302 if (!strncmp(param
, envp_init
[i
], val
- param
))
305 envp_init
[i
] = param
;
307 /* Command line option */
309 for (i
= 0; argv_init
[i
]; i
++) {
310 if (i
== MAX_INIT_ARGS
) {
311 panic_later
= "init";
315 argv_init
[i
] = param
;
320 static int __init
init_setup(char *str
)
324 execute_command
= str
;
326 * In case LILO is going to boot us with default command line,
327 * it prepends "auto" before the whole cmdline which makes
328 * the shell think it should execute a script with such name.
329 * So we ignore all arguments entered _before_ init=... [MJ]
331 for (i
= 1; i
< MAX_INIT_ARGS
; i
++)
335 __setup("init=", init_setup
);
337 static int __init
rdinit_setup(char *str
)
341 ramdisk_execute_command
= str
;
342 /* See "auto" comment in init_setup */
343 for (i
= 1; i
< MAX_INIT_ARGS
; i
++)
347 __setup("rdinit=", rdinit_setup
);
350 static const unsigned int setup_max_cpus
= NR_CPUS
;
351 static inline void setup_nr_cpu_ids(void) { }
352 static inline void smp_prepare_cpus(unsigned int maxcpus
) { }
356 * We need to store the untouched command line for future reference.
357 * We also need to store the touched command line since the parameter
358 * parsing is performed in place, and we should allow a component to
359 * store reference of name/value for future reference.
361 static void __init
setup_command_line(char *command_line
)
364 memblock_virt_alloc(strlen(boot_command_line
) + 1, 0);
365 initcall_command_line
=
366 memblock_virt_alloc(strlen(boot_command_line
) + 1, 0);
367 static_command_line
= memblock_virt_alloc(strlen(command_line
) + 1, 0);
368 strcpy(saved_command_line
, boot_command_line
);
369 strcpy(static_command_line
, command_line
);
373 * We need to finalize in a non-__init function or else race conditions
374 * between the root thread and the init thread may cause start_kernel to
375 * be reaped by free_initmem before the root thread has proceeded to
378 * gcc-3.4 accidentally inlines this function, so use noinline.
381 static __initdata
DECLARE_COMPLETION(kthreadd_done
);
383 static noinline
void __init_refok
rest_init(void)
387 rcu_scheduler_starting();
388 smpboot_thread_init();
390 * We need to spawn init first so that it obtains pid 1, however
391 * the init task will end up wanting to create kthreads, which, if
392 * we schedule it before we create kthreadd, will OOPS.
394 kernel_thread(kernel_init
, NULL
, CLONE_FS
);
395 numa_default_policy();
396 pid
= kernel_thread(kthreadd
, NULL
, CLONE_FS
| CLONE_FILES
);
398 kthreadd_task
= find_task_by_pid_ns(pid
, &init_pid_ns
);
400 complete(&kthreadd_done
);
403 * The boot idle thread must execute schedule()
404 * at least once to get things moving:
406 init_idle_bootup_task(current
);
407 schedule_preempt_disabled();
408 /* Call into cpu_idle with preempt disabled */
409 cpu_startup_entry(CPUHP_ONLINE
);
412 /* Check for early params. */
413 static int __init
do_early_param(char *param
, char *val
,
414 const char *unused
, void *arg
)
416 const struct obs_kernel_param
*p
;
418 for (p
= __setup_start
; p
< __setup_end
; p
++) {
419 if ((p
->early
&& parameq(param
, p
->str
)) ||
420 (strcmp(param
, "console") == 0 &&
421 strcmp(p
->str
, "earlycon") == 0)
423 if (p
->setup_func(val
) != 0)
424 pr_warn("Malformed early option '%s'\n", param
);
427 /* We accept everything at this stage. */
431 void __init
parse_early_options(char *cmdline
)
433 parse_args("early options", cmdline
, NULL
, 0, 0, 0, NULL
,
437 /* Arch code calls this early on, or if not, just before other parsing. */
438 void __init
parse_early_param(void)
440 static int done __initdata
;
441 static char tmp_cmdline
[COMMAND_LINE_SIZE
] __initdata
;
446 /* All fall through to do_early_param. */
447 strlcpy(tmp_cmdline
, boot_command_line
, COMMAND_LINE_SIZE
);
448 parse_early_options(tmp_cmdline
);
453 * Activate the first processor.
456 static void __init
boot_cpu_init(void)
458 int cpu
= smp_processor_id();
459 /* Mark the boot cpu "present", "online" etc for SMP and UP case */
460 set_cpu_online(cpu
, true);
461 set_cpu_active(cpu
, true);
462 set_cpu_present(cpu
, true);
463 set_cpu_possible(cpu
, true);
466 void __init __weak
smp_setup_processor_id(void)
470 # if THREAD_SIZE >= PAGE_SIZE
471 void __init __weak
thread_info_cache_init(void)
477 * Set up kernel memory allocators
479 static void __init
mm_init(void)
482 * page_ext requires contiguous pages,
483 * bigger than MAX_ORDER unless SPARSEMEM.
485 page_ext_init_flatmem();
494 asmlinkage __visible
void __init
start_kernel(void)
499 set_task_stack_end_magic(&init_task
);
500 smp_setup_processor_id();
501 debug_objects_early_init();
504 * Set up the the initial canary ASAP:
506 boot_init_stack_canary();
511 early_boot_irqs_disabled
= true;
514 * Interrupts are still disabled. Do necessary setups, then
519 pr_notice("%s", linux_banner
);
520 setup_arch(&command_line
);
521 mm_init_cpumask(&init_mm
);
522 setup_command_line(command_line
);
524 setup_per_cpu_areas();
525 smp_prepare_boot_cpu(); /* arch-specific boot-cpu hooks */
527 build_all_zonelists(NULL
, NULL
);
530 pr_notice("Kernel command line: %s\n", boot_command_line
);
532 after_dashes
= parse_args("Booting kernel",
533 static_command_line
, __start___param
,
534 __stop___param
- __start___param
,
535 -1, -1, NULL
, &unknown_bootoption
);
536 if (!IS_ERR_OR_NULL(after_dashes
))
537 parse_args("Setting init args", after_dashes
, NULL
, 0, -1, -1,
543 * These use large bootmem allocations and must precede
548 vfs_caches_init_early();
554 * Set up the scheduler prior starting any interrupts (such as the
555 * timer interrupt). Full topology setup happens at smp_init()
556 * time - but meanwhile we still have a functioning scheduler.
560 * Disable preemption - early bootup scheduling is extremely
561 * fragile until we cpu_idle() for the first time.
564 if (WARN(!irqs_disabled(),
565 "Interrupts were enabled *very* early, fixing it\n"))
570 /* trace_printk() and trace points may be used after this */
573 context_tracking_init();
575 /* init some links before init_ISA_irqs() */
585 sched_clock_postinit();
588 call_function_init();
589 WARN(!irqs_disabled(), "Interrupts were enabled early\n");
590 early_boot_irqs_disabled
= false;
593 kmem_cache_init_late();
596 * HACK ALERT! This is early. We're enabling the console before
597 * we've done PCI setups etc, and console_init() must be aware of
598 * this. But we do want output early, in case something goes wrong.
602 panic("Too many boot %s vars at `%s'", panic_later
,
608 * Need to run this when irqs are enabled, because it wants
609 * to self-test [hard/soft]-irqs on/off lock inversion bugs
614 #ifdef CONFIG_BLK_DEV_INITRD
615 if (initrd_start
&& !initrd_below_start_ok
&&
616 page_to_pfn(virt_to_page((void *)initrd_start
)) < min_low_pfn
) {
617 pr_crit("initrd overwritten (0x%08lx < 0x%08lx) - disabling it.\n",
618 page_to_pfn(virt_to_page((void *)initrd_start
)),
624 debug_objects_mem_init();
626 setup_per_cpu_pageset();
636 if (efi_enabled(EFI_RUNTIME_SERVICES
))
637 efi_enter_virtual_mode();
639 #ifdef CONFIG_X86_ESPFIX64
640 /* Should be run before the first non-init thread is created */
643 thread_info_cache_init();
653 /* rootfs populating might need page-writeback */
654 page_writeback_init();
659 taskstats_init_early();
664 acpi_subsystem_init();
667 if (efi_enabled(EFI_RUNTIME_SERVICES
)) {
669 efi_free_boot_services();
674 /* Do the rest non-__init'ed, we're now alive */
678 /* Call all constructor functions linked into the kernel. */
679 static void __init
do_ctors(void)
681 #ifdef CONFIG_CONSTRUCTORS
682 ctor_fn_t
*fn
= (ctor_fn_t
*) __ctors_start
;
684 for (; fn
< (ctor_fn_t
*) __ctors_end
; fn
++)
690 core_param(initcall_debug
, initcall_debug
, bool, 0644);
692 #ifdef CONFIG_KALLSYMS
693 struct blacklist_entry
{
694 struct list_head next
;
698 static __initdata_or_module
LIST_HEAD(blacklisted_initcalls
);
700 static int __init
initcall_blacklist(char *str
)
703 struct blacklist_entry
*entry
;
705 /* str argument is a comma-separated list of functions */
707 str_entry
= strsep(&str
, ",");
709 pr_debug("blacklisting initcall %s\n", str_entry
);
710 entry
= alloc_bootmem(sizeof(*entry
));
711 entry
->buf
= alloc_bootmem(strlen(str_entry
) + 1);
712 strcpy(entry
->buf
, str_entry
);
713 list_add(&entry
->next
, &blacklisted_initcalls
);
720 static bool __init_or_module
initcall_blacklisted(initcall_t fn
)
722 struct blacklist_entry
*entry
;
725 fn_name
= kasprintf(GFP_KERNEL
, "%pf", fn
);
729 list_for_each_entry(entry
, &blacklisted_initcalls
, next
) {
730 if (!strcmp(fn_name
, entry
->buf
)) {
731 pr_debug("initcall %s blacklisted\n", fn_name
);
741 static int __init
initcall_blacklist(char *str
)
743 pr_warn("initcall_blacklist requires CONFIG_KALLSYMS\n");
747 static bool __init_or_module
initcall_blacklisted(initcall_t fn
)
752 __setup("initcall_blacklist=", initcall_blacklist
);
754 static int __init_or_module
do_one_initcall_debug(initcall_t fn
)
756 ktime_t calltime
, delta
, rettime
;
757 unsigned long long duration
;
760 printk(KERN_DEBUG
"calling %pF @ %i\n", fn
, task_pid_nr(current
));
761 calltime
= ktime_get();
763 rettime
= ktime_get();
764 delta
= ktime_sub(rettime
, calltime
);
765 duration
= (unsigned long long) ktime_to_ns(delta
) >> 10;
766 printk(KERN_DEBUG
"initcall %pF returned %d after %lld usecs\n",
772 int __init_or_module
do_one_initcall(initcall_t fn
)
774 int count
= preempt_count();
778 if (initcall_blacklisted(fn
))
782 ret
= do_one_initcall_debug(fn
);
788 if (preempt_count() != count
) {
789 sprintf(msgbuf
, "preemption imbalance ");
790 preempt_count_set(count
);
792 if (irqs_disabled()) {
793 strlcat(msgbuf
, "disabled interrupts ", sizeof(msgbuf
));
796 WARN(msgbuf
[0], "initcall %pF returned with %s\n", fn
, msgbuf
);
802 extern initcall_t __initcall_start
[];
803 extern initcall_t __initcall0_start
[];
804 extern initcall_t __initcall1_start
[];
805 extern initcall_t __initcall2_start
[];
806 extern initcall_t __initcall3_start
[];
807 extern initcall_t __initcall4_start
[];
808 extern initcall_t __initcall5_start
[];
809 extern initcall_t __initcall6_start
[];
810 extern initcall_t __initcall7_start
[];
811 extern initcall_t __initcall_end
[];
813 static initcall_t
*initcall_levels
[] __initdata
= {
825 /* Keep these in sync with initcalls in include/linux/init.h */
826 static char *initcall_level_names
[] __initdata
= {
837 static void __init
do_initcall_level(int level
)
841 strcpy(initcall_command_line
, saved_command_line
);
842 parse_args(initcall_level_names
[level
],
843 initcall_command_line
, __start___param
,
844 __stop___param
- __start___param
,
846 NULL
, &repair_env_string
);
848 for (fn
= initcall_levels
[level
]; fn
< initcall_levels
[level
+1]; fn
++)
849 do_one_initcall(*fn
);
852 static void __init
do_initcalls(void)
856 for (level
= 0; level
< ARRAY_SIZE(initcall_levels
) - 1; level
++)
857 do_initcall_level(level
);
861 * Ok, the machine is now initialized. None of the devices
862 * have been touched yet, but the CPU subsystem is up and
863 * running, and memory and process management works.
865 * Now we can finally start doing some real work..
867 static void __init
do_basic_setup(void)
874 usermodehelper_enable();
876 random_int_secret_init();
879 static void __init
do_pre_smp_initcalls(void)
883 for (fn
= __initcall_start
; fn
< __initcall0_start
; fn
++)
884 do_one_initcall(*fn
);
888 * This function requests modules which should be loaded by default and is
889 * called twice right after initrd is mounted and right before init is
890 * exec'd. If such modules are on either initrd or rootfs, they will be
891 * loaded before control is passed to userland.
893 void __init
load_default_modules(void)
895 load_default_elevator_module();
898 static int run_init_process(const char *init_filename
)
900 argv_init
[0] = init_filename
;
901 return do_execve(getname_kernel(init_filename
),
902 (const char __user
*const __user
*)argv_init
,
903 (const char __user
*const __user
*)envp_init
);
906 static int try_to_run_init_process(const char *init_filename
)
910 ret
= run_init_process(init_filename
);
912 if (ret
&& ret
!= -ENOENT
) {
913 pr_err("Starting init: %s exists but couldn't execute it (error %d)\n",
920 static noinline
void __init
kernel_init_freeable(void);
922 #ifdef CONFIG_DEBUG_RODATA
923 static bool rodata_enabled
= true;
924 static int __init
set_debug_rodata(char *str
)
926 return strtobool(str
, &rodata_enabled
);
928 __setup("rodata=", set_debug_rodata
);
930 static void mark_readonly(void)
935 pr_info("Kernel memory protection disabled.\n");
938 static inline void mark_readonly(void)
940 pr_warn("This architecture does not have kernel memory protection.\n");
944 static int __ref
kernel_init(void *unused
)
948 kernel_init_freeable();
949 /* need to finish all async __init code before freeing the memory */
950 async_synchronize_full();
953 system_state
= SYSTEM_RUNNING
;
954 numa_default_policy();
956 flush_delayed_fput();
958 rcu_end_inkernel_boot();
960 if (ramdisk_execute_command
) {
961 ret
= run_init_process(ramdisk_execute_command
);
964 pr_err("Failed to execute %s (error %d)\n",
965 ramdisk_execute_command
, ret
);
969 * We try each of these until one succeeds.
971 * The Bourne shell can be used instead of init if we are
972 * trying to recover a really broken machine.
974 if (execute_command
) {
975 ret
= run_init_process(execute_command
);
978 panic("Requested init %s failed (error %d).",
979 execute_command
, ret
);
981 if (!try_to_run_init_process("/sbin/init") ||
982 !try_to_run_init_process("/etc/init") ||
983 !try_to_run_init_process("/bin/init") ||
984 !try_to_run_init_process("/bin/sh"))
987 panic("No working init found. Try passing init= option to kernel. "
988 "See Linux Documentation/init.txt for guidance.");
991 static noinline
void __init
kernel_init_freeable(void)
994 * Wait until kthreadd is all set-up.
996 wait_for_completion(&kthreadd_done
);
998 /* Now the scheduler is fully set up and can do blocking allocations */
999 gfp_allowed_mask
= __GFP_BITS_MASK
;
1002 * init can allocate pages on any node
1004 set_mems_allowed(node_states
[N_MEMORY
]);
1006 * init can run on any cpu.
1008 set_cpus_allowed_ptr(current
, cpu_all_mask
);
1010 cad_pid
= task_pid(current
);
1012 smp_prepare_cpus(setup_max_cpus
);
1014 do_pre_smp_initcalls();
1015 lockup_detector_init();
1020 page_alloc_init_late();
1024 /* Open the /dev/console on the rootfs, this should never fail */
1025 if (sys_open((const char __user
*) "/dev/console", O_RDWR
, 0) < 0)
1026 pr_err("Warning: unable to open an initial console.\n");
1031 * check if there is an early userspace init. If yes, let it do all
1035 if (!ramdisk_execute_command
)
1036 ramdisk_execute_command
= "/init";
1038 if (sys_access((const char __user
*) ramdisk_execute_command
, 0) != 0) {
1039 ramdisk_execute_command
= NULL
;
1040 prepare_namespace();
1044 * Ok, we have completed the initial bootup, and
1045 * we're essentially up and running. Get rid of the
1046 * initmem segments and start the user-mode stuff..
1048 * rootfs is available now, try loading the public keys
1049 * and default modules
1052 integrity_load_keys();
1053 load_default_modules();