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| author | Andrew Morton <akpm@osdl.org> | 2006-03-25 03:08:10 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-25 08:23:00 -0800 |
| commit | 96a9b4d31eba4722ba7aad2cc15118a7799f499f (patch) | |
| tree | f96739e328e3e50b43122e551a36415f6e26a1e8 /lib/cpumask.c | |
| parent | 8630282070b4a52b12cfa514ba8558e2f3d56360 (diff) | |
| download | lwn-96a9b4d31eba4722ba7aad2cc15118a7799f499f.tar.gz lwn-96a9b4d31eba4722ba7aad2cc15118a7799f499f.zip | |
[PATCH] cpumask: uninline any_online_cpu()
text data bss dec hex filename
before: 3605597 1363528 363328 5332453 515de5 vmlinux
after: 3605295 1363612 363200 5332107 515c8b vmlinux
218 bytes saved.
Also, optimise any_online_cpu() out of existence on CONFIG_SMP=n.
This function seems inefficient. Can't we simply AND the two masks, then use
find_first_bit()?
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 | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/lib/cpumask.c b/lib/cpumask.c index ea25a034276c..3a67dc5ada7d 100644 --- a/lib/cpumask.c +++ b/lib/cpumask.c @@ -31,3 +31,15 @@ int highest_possible_processor_id(void) return highest; } EXPORT_SYMBOL(highest_possible_processor_id); + +int __any_online_cpu(const cpumask_t *mask) +{ + int cpu; + + for_each_cpu_mask(cpu, *mask) { + if (cpu_online(cpu)) + break; + } + return cpu; +} +EXPORT_SYMBOL(__any_online_cpu); |