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authorDavid S. Miller <davem@davemloft.net>2008-11-11 18:43:02 -0500
committerDavid S. Miller <davem@davemloft.net>2008-11-11 18:43:02 -0500
commit7e452baf6b96b5aeba097afd91501d33d390cc97 (patch)
tree9b0e062d3677d50d731ffd0fba47423bfdee9253 /lib
parent3ac38c3a2e7dac3f8f35a56eb85c27881a4c3833 (diff)
parentf21f237cf55494c3a4209de323281a3b0528da10 (diff)
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
Conflicts: drivers/message/fusion/mptlan.c drivers/net/sfc/ethtool.c net/mac80211/debugfs_sta.c
Diffstat (limited to 'lib')
-rw-r--r--lib/cpumask.c79
1 files changed, 79 insertions, 0 deletions
diff --git a/lib/cpumask.c b/lib/cpumask.c
index 5f97dc25ef9c..8d03f22c6ced 100644
--- a/lib/cpumask.c
+++ b/lib/cpumask.c
@@ -2,6 +2,7 @@
2#include <linux/bitops.h> 2#include <linux/bitops.h>
3#include <linux/cpumask.h> 3#include <linux/cpumask.h>
4#include <linux/module.h> 4#include <linux/module.h>
5#include <linux/bootmem.h>
5 6
6int __first_cpu(const cpumask_t *srcp) 7int __first_cpu(const cpumask_t *srcp)
7{ 8{
@@ -35,3 +36,81 @@ int __any_online_cpu(const cpumask_t *mask)
35 return cpu; 36 return cpu;
36} 37}
37EXPORT_SYMBOL(__any_online_cpu); 38EXPORT_SYMBOL(__any_online_cpu);
39
40/**
41 * cpumask_next_and - get the next cpu in *src1p & *src2p
42 * @n: the cpu prior to the place to search (ie. return will be > @n)
43 * @src1p: the first cpumask pointer
44 * @src2p: the second cpumask pointer
45 *
46 * Returns >= nr_cpu_ids if no further cpus set in both.
47 */
48int cpumask_next_and(int n, const struct cpumask *src1p,
49 const struct cpumask *src2p)
50{
51 while ((n = cpumask_next(n, src1p)) < nr_cpu_ids)
52 if (cpumask_test_cpu(n, src2p))
53 break;
54 return n;
55}
56EXPORT_SYMBOL(cpumask_next_and);
57
58/**
59 * cpumask_any_but - return a "random" in a cpumask, but not this one.
60 * @mask: the cpumask to search
61 * @cpu: the cpu to ignore.
62 *
63 * Often used to find any cpu but smp_processor_id() in a mask.
64 * Returns >= nr_cpu_ids if no cpus set.
65 */
66int cpumask_any_but(const struct cpumask *mask, unsigned int cpu)
67{
68 unsigned int i;
69
70 cpumask_check(cpu);
71 for_each_cpu(i, mask)
72 if (i != cpu)
73 break;
74 return i;
75}
76
77/* These are not inline because of header tangles. */
78#ifdef CONFIG_CPUMASK_OFFSTACK
79bool alloc_cpumask_var(cpumask_var_t *mask, gfp_t flags)
80{
81 if (likely(slab_is_available()))
82 *mask = kmalloc(cpumask_size(), flags);
83 else {
84#ifdef CONFIG_DEBUG_PER_CPU_MAPS
85 printk(KERN_ERR
86 "=> alloc_cpumask_var: kmalloc not available!\n");
87 dump_stack();
88#endif
89 *mask = NULL;
90 }
91#ifdef CONFIG_DEBUG_PER_CPU_MAPS
92 if (!*mask) {
93 printk(KERN_ERR "=> alloc_cpumask_var: failed!\n");
94 dump_stack();
95 }
96#endif
97 return *mask != NULL;
98}
99EXPORT_SYMBOL(alloc_cpumask_var);
100
101void __init alloc_bootmem_cpumask_var(cpumask_var_t *mask)
102{
103 *mask = alloc_bootmem(cpumask_size());
104}
105
106void free_cpumask_var(cpumask_var_t mask)
107{
108 kfree(mask);
109}
110EXPORT_SYMBOL(free_cpumask_var);
111
112void __init free_bootmem_cpumask_var(cpumask_var_t mask)
113{
114 free_bootmem((unsigned long)mask, cpumask_size());
115}
116#endif