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Diffstat (limited to 'arch/s390/kernel/smp.c')
-rw-r--r--arch/s390/kernel/smp.c14
1 files changed, 11 insertions, 3 deletions
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index 53291e94ac7b..d0a2745aec7f 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -673,15 +673,16 @@ __cpu_up(unsigned int cpu)
}
static unsigned int __initdata additional_cpus;
+static unsigned int __initdata possible_cpus;
void __init smp_setup_cpu_possible_map(void)
{
unsigned int pcpus, cpu;
- pcpus = smp_count_cpus() + additional_cpus;
+ pcpus = min(smp_count_cpus() + additional_cpus, (unsigned int) NR_CPUS);
- if (pcpus > NR_CPUS)
- pcpus = NR_CPUS;
+ if (possible_cpus)
+ pcpus = min(possible_cpus, (unsigned int) NR_CPUS);
for (cpu = 0; cpu < pcpus; cpu++)
cpu_set(cpu, cpu_possible_map);
@@ -698,6 +699,13 @@ static int __init setup_additional_cpus(char *s)
}
early_param("additional_cpus", setup_additional_cpus);
+static int __init setup_possible_cpus(char *s)
+{
+ possible_cpus = simple_strtoul(s, NULL, 0);
+ return 0;
+}
+early_param("possible_cpus", setup_possible_cpus);
+
int
__cpu_disable(void)
{