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[SPARC64]: Make cpu_present_map available earlier.

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The change to kernel/sched.c's init code to use for_each_cpu()
requires that the cpu_possible_map be setup much earlier.

Set it up via setup_arch(), constrained to NR_CPUS, and later
constrain it to max_cpus in smp_prepare_cpus().

This fixes SMP booting on sparc64.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
2006-02-25 13:39:56 -08:00
parent 043df59eb3
commit 7abea92145
3 changed files with 27 additions and 9 deletions
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28
arch/sparc64/kernel/smp.c
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@@ -1079,18 +1079,12 @@ int setup_profiling_timer(unsigned int multiplier)
return 0;
}
/* Constrain the number of cpus to max_cpus. */
void __init smp_prepare_cpus(unsigned int max_cpus)
{
int instance, mid;
instance = 0;
while (!cpu_find_by_instance(instance, NULL, &mid)) {
if (mid < max_cpus)
cpu_set(mid, phys_cpu_present_map);
instance++;
}
if (num_possible_cpus() > max_cpus) {
int instance, mid;
instance = 0;
while (!cpu_find_by_instance(instance, NULL, &mid)) {
if (mid != boot_cpu_id) {
@@ -1105,6 +1099,22 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
smp_store_cpu_info(boot_cpu_id);
}
/* Set this up early so that things like the scheduler can init
* properly. We use the same cpu mask for both the present and
* possible cpu map.
*/
void __init smp_setup_cpu_possible_map(void)
{
int instance, mid;
instance = 0;
while (!cpu_find_by_instance(instance, NULL, &mid)) {
if (mid < NR_CPUS)
cpu_set(mid, phys_cpu_present_map);
instance++;
}
}
void __devinit smp_prepare_boot_cpu(void)
{
if (hard_smp_processor_id() >= NR_CPUS) {