#include <linux/writeback.h>
#include <linux/cpu.h>
#include <linux/cpuset.h>
+#include <linux/cgroup.h>
#include <linux/efi.h>
#include <linux/tick.h>
#include <linux/interrupt.h>
#include <linux/pid_namespace.h>
#include <linux/device.h>
#include <linux/kthread.h>
+#include <linux/sched.h>
#include <asm/io.h>
#include <asm/bugs.h>
/*
* This is one of the first .c files built. Error out early if we have compiler
* trouble.
- *
- * Versions of gcc older than that listed below may actually compile and link
- * okay, but the end product can have subtle run time bugs. To avoid associated
- * bogus bug reports, we flatly refuse to compile with a gcc that is known to be
- * too old from the very beginning.
*/
-#if (__GNUC__ < 3) || (__GNUC__ == 3 && __GNUC_MINOR__ < 2)
-#error Sorry, your GCC is too old. It builds incorrect kernels.
-#endif
#if __GNUC__ == 4 && __GNUC_MINOR__ == 1 && __GNUC_PATCHLEVEL__ == 0
#warning gcc-4.1.0 is known to miscompile the kernel. A different compiler version is recommended.
static char *execute_command;
static char *ramdisk_execute_command;
+#ifdef CONFIG_SMP
/* 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);
+unsigned int __initdata setup_max_cpus = NR_CPUS;
/*
* Setup routine for controlling SMP activation
* greater than 0, limits the maximum number of CPUs activated in
* SMP mode to <NUM>.
*/
+#ifndef CONFIG_X86_IO_APIC
+static inline void disable_ioapic_setup(void) {};
+#endif
+
static int __init nosmp(char *str)
{
- max_cpus = 0;
- return 1;
+ setup_max_cpus = 0;
+ disable_ioapic_setup();
+ return 0;
}
-__setup("nosmp", nosmp);
+early_param("nosmp", nosmp);
static int __init maxcpus(char *str)
{
- get_option(&str, &max_cpus);
- return 1;
+ get_option(&str, &setup_max_cpus);
+ if (setup_max_cpus == 0)
+ disable_ioapic_setup();
+
+ return 0;
}
-__setup("maxcpus=", maxcpus);
+early_param("maxcpus", maxcpus);
+#else
+#define setup_max_cpus NR_CPUS
+#endif
+
+/*
+ * 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);
static int __init set_reset_devices(char *str)
{
return 0;
/*
- * Preemptive maintenance for "why didn't my mispelled command
+ * Preemptive maintenance for "why didn't my misspelled command
* line work?"
*/
if (strchr(param, '.') && (!val || strchr(param, '.') < val)) {
return 0;
}
+#ifdef CONFIG_DEBUG_PAGEALLOC
+int __read_mostly debug_pagealloc_enabled = 0;
+#endif
+
static int __init init_setup(char *str)
{
unsigned int i;
#else
-#ifdef __GENERIC_PER_CPU
+#ifndef CONFIG_HAVE_SETUP_PER_CPU_AREA
unsigned long __per_cpu_offset[NR_CPUS] __read_mostly;
EXPORT_SYMBOL(__per_cpu_offset);
ptr += size;
}
}
-#endif /* !__GENERIC_PER_CPU */
+#endif /* CONFIG_HAVE_SETUP_PER_CPU_AREA */
/* Called by boot processor to activate the rest. */
static void __init smp_init(void)
/* FIXME: This should be done in userspace --RR */
for_each_present_cpu(cpu) {
- if (num_online_cpus() >= max_cpus)
+ if (num_online_cpus() >= setup_max_cpus)
break;
if (!cpu_online(cpu))
cpu_up(cpu);
/* Any cleanup work */
printk(KERN_INFO "Brought up %ld CPUs\n", (long)num_online_cpus());
- smp_cpus_done(max_cpus);
+ smp_cpus_done(setup_max_cpus);
}
#endif
struct obs_kernel_param *p;
for (p = __setup_start; p < __setup_end; p++) {
- if (p->early && strcmp(param, p->str) == 0) {
+ if ((p->early && strcmp(param, p->str) == 0) ||
+ (strcmp(param, "console") == 0 &&
+ strcmp(p->str, "earlycon") == 0)
+ ) {
if (p->setup_func(val) != 0)
printk(KERN_WARNING
"Malformed early option '%s'\n", param);
*/
unwind_init();
lockdep_init();
+ cgroup_init_early();
local_irq_disable();
early_boot_irqs_off();
preempt_disable();
build_all_zonelists();
page_alloc_init();
+ enable_debug_pagealloc();
printk(KERN_NOTICE "Kernel command line: %s\n", boot_command_line);
parse_early_param();
parse_args("Booting kernel", static_command_line, __start___param,
vfs_caches_init_early();
cpuset_init_early();
mem_init();
+ cpu_hotplug_init();
kmem_cache_init();
setup_per_cpu_pageset();
numa_policy_init();
#ifdef CONFIG_PROC_FS
proc_root_init();
#endif
+ cgroup_init();
cpuset_init();
taskstats_init_early();
delayacct_init();
do_initcalls();
}
+static int __initdata nosoftlockup;
+
+static int __init nosoftlockup_setup(char *str)
+{
+ nosoftlockup = 1;
+ return 1;
+}
+__setup("nosoftlockup", nosoftlockup_setup);
+
static void __init do_pre_smp_initcalls(void)
{
extern int spawn_ksoftirqd(void);
-#ifdef CONFIG_SMP
- extern int migration_init(void);
migration_init();
-#endif
spawn_ksoftirqd();
- spawn_softlockup_task();
+ if (!nosoftlockup)
+ spawn_softlockup_task();
}
static void run_init_process(char *init_filename)
__set_special_pids(1, 1);
cad_pid = task_pid(current);
- smp_prepare_cpus(max_cpus);
+ smp_prepare_cpus(setup_max_cpus);
do_pre_smp_initcalls();
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff