X-Git-Url: http://pileus.org/git/?a=blobdiff_plain;f=init%2Fmain.c;h=f605a969ea6141281891bb007edc41938c63e3f1;hb=f3344c54cee4c446a39d046e47707ed9d259f72c;hp=d3bcb3b11620784a37dd6d44561a874e9df1d982;hpb=e8b495fe09bc793ae26774e7b2667f7f658d56e2;p=~andy%2Flinux

diff --git a/init/main.c b/init/main.c
index d3bcb3b1162..f605a969ea6 100644
--- a/init/main.c
+++ b/init/main.c
@@ -39,6 +39,7 @@
 #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>
@@ -69,15 +70,7 @@
 /*
  * 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.
@@ -146,9 +139,14 @@ static unsigned int __initdata max_cpus = NR_CPUS;
  * 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;
+	disable_ioapic_setup();
 	return 0;
 }
 
@@ -157,10 +155,13 @@ early_param("nosmp", nosmp);
 static int __init maxcpus(char *str)
 {
 	get_option(&str, &max_cpus);
-	return 1;
+	if (max_cpus == 0)
+		disable_ioapic_setup();
+
+	return 0;
 }
 
-__setup("maxcpus=", maxcpus);
+early_param("maxcpus", maxcpus);
 #else
 #define max_cpus NR_CPUS
 #endif
@@ -279,7 +280,7 @@ static int __init unknown_bootoption(char *param, char *val)
 		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)) {
@@ -389,10 +390,6 @@ static void __init smp_init(void)
 {
 	unsigned int cpu;
 
-#ifndef CONFIG_HOTPLUG_CPU
-	cpu_possible_map = cpu_present_map;
-#endif
-
 	/* FIXME: This should be done in userspace --RR */
 	for_each_present_cpu(cpu) {
 		if (num_online_cpus() >= max_cpus)
@@ -519,6 +516,7 @@ asmlinkage void __init start_kernel(void)
 	 */
 	unwind_init();
 	lockdep_init();
+	cgroup_init_early();
 
 	local_irq_disable();
 	early_boot_irqs_off();
@@ -537,10 +535,6 @@ asmlinkage void __init start_kernel(void)
 	setup_arch(&command_line);
 	setup_command_line(command_line);
 	unwind_setup();
-#ifndef CONFIG_HOTPLUG_CPU
-	if (max_cpus < 2)
-		cpu_possible_map = cpu_online_map;
-#endif
 	setup_per_cpu_areas();
 	smp_prepare_boot_cpu();	/* arch-specific boot-cpu hooks */
 
@@ -640,6 +634,7 @@ asmlinkage void __init start_kernel(void)
 #ifdef CONFIG_PROC_FS
 	proc_root_init();
 #endif
+	cgroup_init();
 	cpuset_init();
 	taskstats_init_early();
 	delayacct_init();