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smp: add set_nr_cpu_ids()

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In preparation to support compile-time nr_cpu_ids, add a setter for
the variable.

This is a no-op for all arches.

Signed-off-by: Yury Norov <yury.norov@gmail.com>
This commit is contained in:
Yury Norov
2022-09-05 16:08:17 -07:00
parent 53fc190cc6
commit 38bef8e57f
6 changed files with 12 additions and 7 deletions
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4
kernel/smp.c
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@@ -1070,7 +1070,7 @@ static int __init nrcpus(char *str)
int nr_cpus;
if (get_option(&str, &nr_cpus) && nr_cpus > 0 && nr_cpus < nr_cpu_ids)
nr_cpu_ids = nr_cpus;
set_nr_cpu_ids(nr_cpus);
return 0;
}
@@ -1097,7 +1097,7 @@ EXPORT_SYMBOL(nr_cpu_ids);
/* An arch may set nr_cpu_ids earlier if needed, so this would be redundant */
void __init setup_nr_cpu_ids(void)
{
nr_cpu_ids = find_last_bit(cpumask_bits(cpu_possible_mask),NR_CPUS) + 1;
set_nr_cpu_ids(find_last_bit(cpumask_bits(cpu_possible_mask), NR_CPUS) + 1);
}
/* Called by boot processor to activate the rest. */