x86: prepare for cpumask iterators to only go to nr_cpu_ids

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.

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>

diff --git a/arch/x86/kernel/apic.c b/arch/x86/kernel/apic.c
index a375791..3b630ec 100644 (file)
--- a/arch/x86/kernel/apic.c
+++ b/arch/x86/kernel/apic.c
@@ -2106,7 +2106,7 @@ __cpuinit int apic_is_clustered_box(void)
        bios_cpu_apicid = early_per_cpu_ptr(x86_bios_cpu_apicid);
        bitmap_zero(clustermap, NUM_APIC_CLUSTERS);
 
-       for (i = 0; i < NR_CPUS; i++) {
+       for (i = 0; i < nr_cpu_ids; i++) {
                /* are we being called early in kernel startup? */
                if (bios_cpu_apicid) {
                        id = bios_cpu_apicid[i];

diff --git a/arch/x86/mach-voyager/voyager_smp.c b/arch/x86/mach-voyager/voyager_smp.c
index 9c99018..a5bc054 100644 (file)
--- a/arch/x86/mach-voyager/voyager_smp.c
+++ b/arch/x86/mach-voyager/voyager_smp.c
@@ -672,7 +672,7 @@ void __init smp_boot_cpus(void)
 
        /* loop over all the extended VIC CPUs and boot them.  The
         * Quad CPUs must be bootstrapped by their extended VIC cpu */
-       for (i = 0; i < NR_CPUS; i++) {
+       for (i = 0; i < nr_cpu_ids; i++) {
                if (i == boot_cpu_id || !cpu_isset(i, phys_cpu_present_map))
                        continue;
                do_boot_cpu(i);

diff --git a/arch/x86/mm/numa_64.c b/arch/x86/mm/numa_64.c
index cebcbf1..71a14f8 100644 (file)
--- a/arch/x86/mm/numa_64.c
+++ b/arch/x86/mm/numa_64.c
@@ -278,7 +278,7 @@ void __init numa_init_array(void)
        int rr, i;
 
        rr = first_node(node_online_map);
-       for (i = 0; i < NR_CPUS; i++) {
+       for (i = 0; i < nr_cpu_ids; i++) {
                if (early_cpu_to_node(i) != NUMA_NO_NODE)
                        continue;
                numa_set_node(i, rr);
@@ -549,7 +549,7 @@ void __init initmem_init(unsigned long start_pfn, unsigned long last_pfn)
        memnodemap[0] = 0;
        node_set_online(0);
        node_set(0, node_possible_map);
-       for (i = 0; i < NR_CPUS; i++)
+       for (i = 0; i < nr_cpu_ids; i++)
                numa_set_node(i, 0);
        e820_register_active_regions(0, start_pfn, last_pfn);
        setup_node_bootmem(0, start_pfn << PAGE_SHIFT, last_pfn << PAGE_SHIFT);

diff --git a/arch/x86/mm/srat_64.c b/arch/x86/mm/srat_64.c
index 51c0a2f..09737c8 100644 (file)
--- a/arch/x86/mm/srat_64.c
+++ b/arch/x86/mm/srat_64.c
@@ -382,7 +382,7 @@ int __init acpi_scan_nodes(unsigned long start, unsigned long end)
                if (!node_online(i))
                        setup_node_bootmem(i, nodes[i].start, nodes[i].end);
 
-       for (i = 0; i < NR_CPUS; i++) {
+       for (i = 0; i < nr_cpu_ids; i++) {
                int node = early_cpu_to_node(i);
 
                if (node == NUMA_NO_NODE)