static int init(void * unused)
{
lock_kernel();
/*
* init can run on any cpu.
*/
set_cpus_allowed(current, CPU_MASK_ALL);
/*
* Tell the world that we're going to be the grim
* reaper of innocent orphaned children.
*
* We don't want people to have to make incorrect
* assumptions about where in the task array this
* can be found.
*/
child_reaper = current;
smp_prepare_cpus(max_cpus);
init_hardirqs();
do_pre_smp_initcalls();
smp_init();
sched_init_smp();
cpuset_init_smp();
/*
* Do this before initcalls, because some drivers want to access
* firmware files.
*/
populate_rootfs();
do_basic_setup();
/*
* check if there is an early userspace init. If yes, let it do all
* the work
*/
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();
}
#ifdef CONFIG_PREEMPT_RT
WARN_ON(irqs_disabled());
#endif
#define DEBUG_COUNT (defined(CONFIG_DEBUG_RT_MUTEXES) + defined(CONFIG_DEBUG_PREEMPT) + defined(CONFIG_CRITICAL_PREEMPT_TIMING) + defined(CONFIG_CRITICAL_IRQSOFF_TIMING) + defined(CONFIG_LATENCY_TRACE) + defined(CONFIG_DEBUG_SLAB) + defined(CONFIG_DEBUG_PAGEALLOC) + defined(CONFIG_LOCKDEP))
#if DEBUG_COUNT > 0
printk(KERN_ERR "*****************************************************************************\n");
printk(KERN_ERR "* *\n");
#if DEBUG_COUNT == 1
printk(KERN_ERR "* REMINDER, the following debugging option is turned on in your .config: *\n");
#else
printk(KERN_ERR "* REMINDER, the following debugging options are turned on in your .config: *\n");
#endif
printk(KERN_ERR "* *\n");
#ifdef CONFIG_DEBUG_RT_MUTEXES
printk(KERN_ERR "* CONFIG_DEBUG_RT_MUTEXES *\n");
#endif
#ifdef CONFIG_DEBUG_PREEMPT
printk(KERN_ERR "* CONFIG_DEBUG_PREEMPT *\n");
#endif
#ifdef CONFIG_CRITICAL_PREEMPT_TIMING
printk(KERN_ERR "* CONFIG_CRITICAL_PREEMPT_TIMING *\n");
#endif
#ifdef CONFIG_CRITICAL_IRQSOFF_TIMING
printk(KERN_ERR "* CONFIG_CRITICAL_IRQSOFF_TIMING *\n");
#endif
#ifdef CONFIG_LATENCY_TRACE
printk(KERN_ERR "* CONFIG_LATENCY_TRACE *\n");
#endif
#ifdef CONFIG_DEBUG_SLAB
printk(KERN_ERR "* CONFIG_DEBUG_SLAB *\n");
#endif
#ifdef CONFIG_DEBUG_PAGEALLOC
printk(KERN_ERR "* CONFIG_DEBUG_PAGEALLOC *\n");
#endif
#ifdef CONFIG_LOCKDEP
printk(KERN_ERR "* CONFIG_LOCKDEP *\n");
#endif
printk(KERN_ERR "* *\n");
#if DEBUG_COUNT == 1
printk(KERN_ERR "* it may increase runtime overhead and latencies. *\n");
#else
printk(KERN_ERR "* they may increase runtime overhead and latencies. *\n");
#endif
printk(KERN_ERR "* *\n");
printk(KERN_ERR "*****************************************************************************\n");
#endif
/*
* Ok, we have completed the initial bootup, and
* we're essentially up and running. Get rid of the
* initmem segments and start the user-mode stuff..
*/
free_initmem();
unlock_kernel();
mark_rodata_ro();
system_state = SYSTEM_RUNNING;
numa_default_policy();
if (sys_open((const char __user *) "/dev/console", O_RDWR, 0) < 0)
printk(KERN_WARNING "Warning: unable to open an initial console.\n");
(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);
}
#ifdef CONFIG_PREEMPT_RT
WARN_ON(irqs_disabled());
#endif
/*
* 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) {
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");
run_init_process("/bin/sh");
panic("No init found. Try passing init= option to kernel.");
}
static int init(void * unused)
{
lock_kernel();
/*
* Tell the world that we're going to be the grim
* reaper of innocent orphaned children.
*
* We don't want people to have to make incorrect
* assumptions about where in the task array this
* can be found.
*/
child_reaper = current;
/* Sets up cpus_possible() */
smp_prepare_cpus(max_cpus);
init_hardirqs();
do_pre_smp_initcalls();
fixup_cpu_present_map();
smp_init();
sched_init_smp();
/*
* Do this before initcalls, because some drivers want to access
* firmware files.
*/
populate_rootfs();
do_basic_setup();
/*
* 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
prepare_namespace();
/*
* Ok, we have completed the initial bootup, and
* we're essentially up and running. Get rid of the
* initmem segments and start the user-mode stuff..
*/
free_initmem();
unlock_kernel();
system_state = SYSTEM_RUNNING;
numa_default_policy();
if (sys_open((const char __user *) "/dev/console", O_RDWR, 0) < 0)
printk("Warning: unable to open an initial console.\n");
(void) sys_dup(0);
(void) sys_dup(0);
/*
* 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.
*/
#ifdef CONFIG_KFI_BOOT_TIMING
to_userspace();
#endif
if (execute_command)
run_init_process(execute_command);
run_init_process("/sbin/init");
run_init_process("/etc/init");
run_init_process("/bin/init");
run_init_process("/bin/sh");
panic("No init found. Try passing init= option to kernel.");
}