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init: move setup of nr_cpu_ids to as early as possible

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Move the setting of nr_cpu_ids from sched_init() to start_kernel()
so that it's available as early as possible.

Note that an arch has the option of setting it even earlier if need be,
but it should not result in a different value than the setup_nr_cpu_ids()
function.

Signed-off-by: Mike Travis <travis@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Mike Travis 2008-03-26 14:23:48 -07:00 • committed by Ingo Molnar
parent 4bdbaad33d
commit e0982e90cd
2 changed files with 17 additions and 7 deletions
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17
init/main.c
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@ -359,6 +359,7 @@ static void __init smp_init(void)
#endif
static inline void setup_per_cpu_areas(void) { }
static inline void setup_nr_cpu_ids(void) { }
static inline void smp_prepare_cpus(unsigned int maxcpus) { }
#else
@ -368,6 +369,21 @@ cpumask_t cpu_mask_all __read_mostly = CPU_MASK_ALL;
EXPORT_SYMBOL(cpu_mask_all);
#endif
/* 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)
{
int cpu, highest_cpu = 0;
for_each_possible_cpu(cpu)
highest_cpu = cpu;
nr_cpu_ids = highest_cpu + 1;
}
#ifndef CONFIG_HAVE_SETUP_PER_CPU_AREA
unsigned long __per_cpu_offset[NR_CPUS] __read_mostly;
@ -542,6 +558,7 @@ asmlinkage void __init start_kernel(void)
setup_command_line(command_line);
unwind_setup();
setup_per_cpu_areas();
setup_nr_cpu_ids();
smp_prepare_boot_cpu(); /* arch-specific boot-cpu hooks */
/*