diff options
| author | Andrew Morton <akpm@osdl.org> | 2006-03-25 03:08:09 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-25 08:23:00 -0800 |
| commit | 8630282070b4a52b12cfa514ba8558e2f3d56360 (patch) | |
| tree | cf648185ccc0a0ba4e7cf752c1c09a0272a6d192 /lib/cpumask.c | |
| parent | 3d18bd74a22d0bed3bc81fc64c4ba6344a10f155 (diff) | |
| download | lwn-8630282070b4a52b12cfa514ba8558e2f3d56360.tar.gz lwn-8630282070b4a52b12cfa514ba8558e2f3d56360.zip | |
[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.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/lib/cpumask.c b/lib/cpumask.c index ba2f8543052c..ea25a034276c 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); |