cpumask: prepare for iterators to only go to nr_cpu_ids/nr_cpumask_bits.: core

Impact: cleanup

In future, all cpumask ops will only be valid (in general) for bit
numbers < nr_cpu_ids.  So use that instead of NR_CPUS in iterators
and other comparisons.

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>
Acked-by: James Morris <jmorris@namei.org>
Cc: Eric Biederman <ebiederm@xmission.com>

diff --git a/kernel/kexec.c b/kernel/kexec.c
index ac0fde7..3fb855a 100644 (file)
--- a/kernel/kexec.c
+++ b/kernel/kexec.c
@@ -1116,7 +1116,7 @@ void crash_save_cpu(struct pt_regs *regs, int cpu)
        struct elf_prstatus prstatus;
        u32 *buf;
 
-       if ((cpu < 0) || (cpu >= NR_CPUS))
+       if ((cpu < 0) || (cpu >= nr_cpu_ids))
                return;
 
        /* Using ELF notes here is opportunistic.

diff --git a/kernel/smp.c b/kernel/smp.c
index 172b182..5cfa0e5 100644 (file)
--- a/kernel/smp.c
+++ b/kernel/smp.c
@@ -223,7 +223,7 @@ int smp_call_function_single(int cpu, void (*func) (void *info), void *info,
                local_irq_save(flags);
                func(info);
                local_irq_restore(flags);
-       } else if ((unsigned)cpu < NR_CPUS && cpu_online(cpu)) {
+       } else if ((unsigned)cpu < nr_cpu_ids && cpu_online(cpu)) {
                struct call_single_data *data = NULL;
 
                if (!wait) {

diff --git a/security/selinux/selinuxfs.c b/security/selinux/selinuxfs.c
index c863036..e552099 100644 (file)
--- a/security/selinux/selinuxfs.c
+++ b/security/selinux/selinuxfs.c
@@ -1211,7 +1211,7 @@ static struct avc_cache_stats *sel_avc_get_stat_idx(loff_t *idx)
 {
        int cpu;
 
-       for (cpu = *idx; cpu < NR_CPUS; ++cpu) {
+       for (cpu = *idx; cpu < nr_cpu_ids; ++cpu) {
                if (!cpu_possible(cpu))
                        continue;
                *idx = cpu + 1;