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authorAndrew Morton <akpm@osdl.org>2006-03-25 03:08:09 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-25 08:23:00 -0800
commit8630282070b4a52b12cfa514ba8558e2f3d56360 (patch)
treecf648185ccc0a0ba4e7cf752c1c09a0272a6d192 /lib/cpumask.c
parent3d18bd74a22d0bed3bc81fc64c4ba6344a10f155 (diff)
downloadlinux-8630282070b4a52b12cfa514ba8558e2f3d56360.tar.gz
[PATCH] cpumask: uninline highest_possible_processor_id()
Shrinks the only caller (net/bridge/netfilter/ebtables.c) by 174 bytes. Also, optimise highest_possible_processor_id() out of existence on CONFIG_SMP=n. Cc: Paul Jackson <pj@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'lib/cpumask.c')
-rw-r--r--lib/cpumask.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/lib/cpumask.c b/lib/cpumask.c
index ba2f8543052..ea25a034276 100644
--- a/lib/cpumask.c
+++ b/lib/cpumask.c
@@ -14,3 +14,20 @@ int __next_cpu(int n, const cpumask_t *srcp)
return min_t(int, NR_CPUS, find_next_bit(srcp->bits, NR_CPUS, n+1));
}
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);