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[PATCH] Convert highest_possible_processor_id to nr_cpu_ids

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We frequently need the maximum number of possible processors in order to
allocate arrays for all processors.  So far this was done using
highest_possible_processor_id().  However, we do need the number of
processors not the highest id.  Moreover the number was so far dynamically
calculated on each invokation.  The number of possible processors does not
change when the system is running.  We can therefore calculate that number
once.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Cc: Frederik Deweerdt <frederik.deweerdt@gmail.com>
Cc: Neil Brown <neilb@suse.de>
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Christoph Lameter
2007-02-20 13:57:51 -08:00
committed by Linus Torvalds
parent 74c7aa8b85
commit 53b8a315b7
5 changed files with 17 additions and 29 deletions
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init/main.c
+9 -4
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@@ -387,14 +387,19 @@ static void __init setup_per_cpu_areas(void)
/* Called by boot processor to activate the rest. */
static void __init smp_init(void)
{
unsigned int i;
unsigned int cpu;
unsigned highest = 0;
for_each_cpu_mask(cpu, cpu_possible_map)
highest = cpu;
nr_cpu_ids = highest + 1;
/* FIXME: This should be done in userspace --RR */
for_each_present_cpu(i) {
for_each_present_cpu(cpu) {
if (num_online_cpus() >= max_cpus)
break;
if (!cpu_online(i))
cpu_up(i);
if (!cpu_online(cpu))
cpu_up(cpu);
}
/* Any cleanup work */