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authorChristoph Lameter <clameter@sgi.com>2007-02-20 13:57:51 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-02-20 17:10:13 -0800
commit53b8a315b76a3f3c70a5644976c0095460eb13d8 (patch)
treef407a607adb1f552942aef9150ec709ed3f01798 /lib/cpumask.c
parent74c7aa8b8581e0ba8d6d17c623b9279aaabbb0cf (diff)
downloadlinux-53b8a315b76a3f3c70a5644976c0095460eb13d8.tar.gz
[PATCH] Convert highest_possible_processor_id to nr_cpu_ids
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>
Diffstat (limited to 'lib/cpumask.c')
-rw-r--r--lib/cpumask.c18
1 files changed, 2 insertions, 16 deletions
diff --git a/lib/cpumask.c b/lib/cpumask.c
index 3a67dc5ada7..1ea2c184315 100644
--- a/lib/cpumask.c
+++ b/lib/cpumask.c
@@ -15,22 +15,8 @@ int __next_cpu(int n, const cpumask_t *srcp)
}
EXPORT_SYMBOL(__next_cpu);
-/*
- * Find the highest possible smp_processor_id()
- *
- * Note: if we're prepared to assume that cpu_possible_map never changes
- * (reasonable) then this function should cache its return value.
- */
-int highest_possible_processor_id(void)
-{
- unsigned int cpu;
- unsigned highest = 0;
-
- for_each_cpu_mask(cpu, cpu_possible_map)
- highest = cpu;
- return highest;
-}
-EXPORT_SYMBOL(highest_possible_processor_id);
+int nr_cpu_ids;
+EXPORT_SYMBOL(nr_cpu_ids);
int __any_online_cpu(const cpumask_t *mask)
{