ia64/linux-2.6.18-xen.hg

view lib/cpumask.c @ 912:dd42cdb0ab89

[IA64] Build blktap2 driver by default in x86 builds.

add CONFIG_XEN_BLKDEV_TAP2=y to buildconfigs/linux-defconfig_xen_ia64.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
author Isaku Yamahata <yamahata@valinux.co.jp>
date Mon Jun 29 12:09:16 2009 +0900 (2009-06-29)
parents 831230e53067
children
line source
1 #include <linux/kernel.h>
2 #include <linux/bitops.h>
3 #include <linux/cpumask.h>
4 #include <linux/module.h>
6 int __first_cpu(const cpumask_t *srcp)
7 {
8 return min_t(int, NR_CPUS, find_first_bit(srcp->bits, NR_CPUS));
9 }
10 EXPORT_SYMBOL(__first_cpu);
12 int __next_cpu(int n, const cpumask_t *srcp)
13 {
14 return min_t(int, NR_CPUS, find_next_bit(srcp->bits, NR_CPUS, n+1));
15 }
16 EXPORT_SYMBOL(__next_cpu);
18 /*
19 * Find the highest possible smp_processor_id()
20 *
21 * Note: if we're prepared to assume that cpu_possible_map never changes
22 * (reasonable) then this function should cache its return value.
23 */
24 int highest_possible_processor_id(void)
25 {
26 unsigned int cpu;
27 unsigned highest = 0;
29 for_each_cpu_mask(cpu, cpu_possible_map)
30 highest = cpu;
31 return highest;
32 }
33 EXPORT_SYMBOL(highest_possible_processor_id);
35 int __any_online_cpu(const cpumask_t *mask)
36 {
37 int cpu;
39 for_each_cpu_mask(cpu, *mask) {
40 if (cpu_online(cpu))
41 break;
42 }
43 return cpu;
44 }
45 EXPORT_SYMBOL(__any_online_cpu);