diff options
author | Jeff Garzik <jeff@garzik.org> | 2006-03-29 17:18:49 -0500 |
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committer | Jeff Garzik <jeff@garzik.org> | 2006-03-29 17:18:49 -0500 |
commit | e02a4cabfcb9a999b74a2e2e6f13ffcb7ff2d606 (patch) | |
tree | 2f3db60be4c57eca2a4c3ab3f3122dcf1ec0c624 /lib/cpumask.c | |
parent | 600511e86babe3727264a0883a3a264f6fb6caf5 (diff) | |
parent | f3cab8a0b1a772dc8b055b7affa567a366627c9e (diff) |
Merge branch 'master'
Diffstat (limited to 'lib/cpumask.c')
-rw-r--r-- | lib/cpumask.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/lib/cpumask.c b/lib/cpumask.c new file mode 100644 index 00000000000..3a67dc5ada7 --- /dev/null +++ b/lib/cpumask.c @@ -0,0 +1,45 @@ +#include <linux/kernel.h> +#include <linux/bitops.h> +#include <linux/cpumask.h> +#include <linux/module.h> + +int __first_cpu(const cpumask_t *srcp) +{ + return min_t(int, NR_CPUS, find_first_bit(srcp->bits, NR_CPUS)); +} +EXPORT_SYMBOL(__first_cpu); + +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); + +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); |