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[S390] cpumask: prepare for iterators to only go to nr_cpu_ids/nr_cpumask_bits.

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Impact: cleanup, futureproof

In fact, all cpumask ops will only be valid (in general) for bit
numbers < nr_cpu_ids.  So use that instead of NR_CPUS in various
places (I also updated the immediate sites to use the new cpumask_
operators).

This is always safe: no cpu number can be >= nr_cpu_ids, and
nr_cpu_ids is initialized to NR_CPUS at boot.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Mike Travis <travis@sgi.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Rusty Russell 2009-03-26 15:24:59 +01:00 committed by Martin Schwidefsky
parent 6f7a321d5f
commit 93632d1bf7
1 changed files with 9 additions and 9 deletions
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18
arch/s390/kernel/smp.c
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@ -297,8 +297,8 @@ static int smp_rescan_cpus_sigp(cpumask_t avail)
{
int cpu_id, logical_cpu;
logical_cpu = first_cpu(avail);
if (logical_cpu == NR_CPUS)
logical_cpu = cpumask_first(&avail);
if (logical_cpu >= nr_cpu_ids)
return 0;
for (cpu_id = 0; cpu_id <= 65535; cpu_id++) {
if (cpu_known(cpu_id))
@ -309,8 +309,8 @@ static int smp_rescan_cpus_sigp(cpumask_t avail)
continue;
cpu_set(logical_cpu, cpu_present_map);
smp_cpu_state[logical_cpu] = CPU_STATE_CONFIGURED;
logical_cpu = next_cpu(logical_cpu, avail);
if (logical_cpu == NR_CPUS)
logical_cpu = cpumask_next(logical_cpu, &avail);
if (logical_cpu >= nr_cpu_ids)
break;
}
return 0;
@ -322,8 +322,8 @@ static int smp_rescan_cpus_sclp(cpumask_t avail)
int cpu_id, logical_cpu, cpu;
int rc;
logical_cpu = first_cpu(avail);
if (logical_cpu == NR_CPUS)
logical_cpu = cpumask_first(&avail);
if (logical_cpu >= nr_cpu_ids)
return 0;
info = kmalloc(sizeof(*info), GFP_KERNEL);
if (!info)
@ -344,8 +344,8 @@ static int smp_rescan_cpus_sclp(cpumask_t avail)
smp_cpu_state[logical_cpu] = CPU_STATE_STANDBY;
else
smp_cpu_state[logical_cpu] = CPU_STATE_CONFIGURED;
logical_cpu = next_cpu(logical_cpu, avail);
if (logical_cpu == NR_CPUS)
logical_cpu = cpumask_next(logical_cpu, &avail);
if (logical_cpu >= nr_cpu_ids)
break;
}
out:
@ -591,7 +591,7 @@ static int __init setup_possible_cpus(char *s)
pcpus = simple_strtoul(s, NULL, 0);
cpu_possible_map = cpumask_of_cpu(0);
for (cpu = 1; cpu < pcpus && cpu < NR_CPUS; cpu++)
for (cpu = 1; cpu < pcpus && cpu < nr_cpu_ids; cpu++)
cpu_set(cpu, cpu_possible_map);
return 0;
}