* Simplified starting of init: Michael A. Griffith <grif@acm.org>
*/
-#define __KERNEL_SYSCALLS__
-
#include <linux/types.h>
#include <linux/module.h>
#include <linux/proc_fs.h>
/* Setup configured maximum number of CPUs to activate */
static unsigned int max_cpus = NR_CPUS;
+/*
+ * If set, this is an indication to the drivers that reset the underlying
+ * device before going ahead with the initialization otherwise driver might
+ * rely on the BIOS and skip the reset operation.
+ *
+ * This is useful if kernel is booting in an unreliable environment.
+ * For ex. kdump situaiton where previous kernel has crashed, BIOS has been
+ * skipped and devices will be in unknown state.
+ */
+unsigned int reset_devices;
+EXPORT_SYMBOL(reset_devices);
+
/*
* Setup routine for controlling SMP activation
*
__setup("maxcpus=", maxcpus);
+static int __init set_reset_devices(char *str)
+{
+ reset_devices = 1;
+ return 1;
+}
+
+__setup("reset_devices", set_reset_devices);
+
static char * argv_init[MAX_INIT_ARGS+2] = { "init", NULL, };
char * envp_init[MAX_INIT_ENVS+2] = { "HOME=/", "TERM=linux", NULL, };
static const char *panic_later, *panic_param;
static int __init obsolete_checksetup(char *line)
{
struct obs_kernel_param *p;
+ int had_early_param = 0;
p = __setup_start;
do {
int n = strlen(p->str);
if (!strncmp(line, p->str, n)) {
if (p->early) {
- /* Already done in parse_early_param? (Needs
- * exact match on param part) */
+ /* Already done in parse_early_param?
+ * (Needs exact match on param part).
+ * Keep iterating, as we can have early
+ * params and __setups of same names 8( */
if (line[n] == '\0' || line[n] == '=')
- return 1;
+ had_early_param = 1;
} else if (!p->setup_func) {
printk(KERN_WARNING "Parameter %s is obsolete,"
" ignored\n", p->str);
}
p++;
} while (p < __setup_end);
- return 0;
+
+ return had_early_param;
}
/*
* Need to run as early as possible, to initialize the
* lockdep hash:
*/
+ unwind_init();
lockdep_init();
local_irq_disable();
printk(KERN_NOTICE);
printk(linux_banner);
setup_arch(&command_line);
+ unwind_setup();
setup_per_cpu_areas();
smp_prepare_boot_cpu(); /* arch-specific boot-cpu hooks */
__stop___param - __start___param,
&unknown_bootoption);
sort_main_extable();
- unwind_init();
trap_init();
rcu_init();
init_IRQ();
static void run_init_process(char *init_filename)
{
argv_init[0] = init_filename;
- execve(init_filename, argv_init, envp_init);
+ kernel_execve(init_filename, argv_init, envp_init);
}
static int init(void * unused)
*/
child_reaper = current;
+ cad_pid = task_pid(current);
+
smp_prepare_cpus(max_cpus);
do_pre_smp_initcalls();