diff options
Diffstat (limited to 'init')
| -rw-r--r-- | init/main.c | 90 |
1 files changed, 1 insertions, 89 deletions
diff --git a/init/main.c b/init/main.c index 33c37c3..3627bb3 100644 --- a/init/main.c +++ b/init/main.c @@ -129,63 +129,6 @@ static char *static_command_line; static char *execute_command; static char *ramdisk_execute_command; -#ifdef CONFIG_SMP -/* Setup configured maximum number of CPUs to activate */ -unsigned int setup_max_cpus = NR_CPUS; -EXPORT_SYMBOL(setup_max_cpus); - - -/* - * Setup routine for controlling SMP activation - * - * Command-line option of "nosmp" or "maxcpus=0" will disable SMP - * activation entirely (the MPS table probe still happens, though). - * - * Command-line option of "maxcpus=<NUM>", where <NUM> is an integer - * greater than 0, limits the maximum number of CPUs activated in - * SMP mode to <NUM>. - */ - -void __weak arch_disable_smp_support(void) { } - -static int __init nosmp(char *str) -{ - setup_max_cpus = 0; - arch_disable_smp_support(); - - return 0; -} - -early_param("nosmp", nosmp); - -/* this is hard limit */ -static int __init nrcpus(char *str) -{ - int nr_cpus; - - get_option(&str, &nr_cpus); - if (nr_cpus > 0 && nr_cpus < nr_cpu_ids) - nr_cpu_ids = nr_cpus; - - return 0; -} - -early_param("nr_cpus", nrcpus); - -static int __init maxcpus(char *str) -{ - get_option(&str, &setup_max_cpus); - if (setup_max_cpus == 0) - arch_disable_smp_support(); - - return 0; -} - -early_param("maxcpus", maxcpus); -#else -static const unsigned int 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 @@ -362,7 +305,7 @@ static int __init rdinit_setup(char *str) __setup("rdinit=", rdinit_setup); #ifndef CONFIG_SMP - +static const unsigned int setup_max_cpus = NR_CPUS; #ifdef CONFIG_X86_LOCAL_APIC static void __init smp_init(void) { @@ -374,37 +317,6 @@ static void __init smp_init(void) static inline void setup_nr_cpu_ids(void) { } static inline void smp_prepare_cpus(unsigned int maxcpus) { } - -#else - -/* Setup number of possible processor ids */ -int nr_cpu_ids __read_mostly = NR_CPUS; -EXPORT_SYMBOL(nr_cpu_ids); - -/* An arch may set nr_cpu_ids earlier if needed, so this would be redundant */ -static void __init setup_nr_cpu_ids(void) -{ - nr_cpu_ids = find_last_bit(cpumask_bits(cpu_possible_mask),NR_CPUS) + 1; -} - -/* Called by boot processor to activate the rest. */ -static void __init smp_init(void) -{ - unsigned int cpu; - - /* FIXME: This should be done in userspace --RR */ - for_each_present_cpu(cpu) { - 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(setup_max_cpus); -} - #endif /* |