Root/
Source at commit b386be689295730688885552666ea40b2e639b14 created 11 years 11 months ago. By Maarten ter Huurne, Revert "MIPS: JZ4740: reset: Initialize hibernate wakeup counters." | |
---|---|
1 | #include <linux/slab.h> |
2 | #include <linux/kernel.h> |
3 | #include <linux/bitops.h> |
4 | #include <linux/cpumask.h> |
5 | #include <linux/module.h> |
6 | #include <linux/bootmem.h> |
7 | |
8 | int __first_cpu(const cpumask_t *srcp) |
9 | { |
10 | return min_t(int, NR_CPUS, find_first_bit(srcp->bits, NR_CPUS)); |
11 | } |
12 | EXPORT_SYMBOL(__first_cpu); |
13 | |
14 | int __next_cpu(int n, const cpumask_t *srcp) |
15 | { |
16 | return min_t(int, NR_CPUS, find_next_bit(srcp->bits, NR_CPUS, n+1)); |
17 | } |
18 | EXPORT_SYMBOL(__next_cpu); |
19 | |
20 | #if NR_CPUS > 64 |
21 | int __next_cpu_nr(int n, const cpumask_t *srcp) |
22 | { |
23 | return min_t(int, nr_cpu_ids, |
24 | find_next_bit(srcp->bits, nr_cpu_ids, n+1)); |
25 | } |
26 | EXPORT_SYMBOL(__next_cpu_nr); |
27 | #endif |
28 | |
29 | int __any_online_cpu(const cpumask_t *mask) |
30 | { |
31 | int cpu; |
32 | |
33 | for_each_cpu(cpu, mask) { |
34 | if (cpu_online(cpu)) |
35 | break; |
36 | } |
37 | return cpu; |
38 | } |
39 | EXPORT_SYMBOL(__any_online_cpu); |
40 | |
41 | /** |
42 | * cpumask_next_and - get the next cpu in *src1p & *src2p |
43 | * @n: the cpu prior to the place to search (ie. return will be > @n) |
44 | * @src1p: the first cpumask pointer |
45 | * @src2p: the second cpumask pointer |
46 | * |
47 | * Returns >= nr_cpu_ids if no further cpus set in both. |
48 | */ |
49 | int cpumask_next_and(int n, const struct cpumask *src1p, |
50 | const struct cpumask *src2p) |
51 | { |
52 | while ((n = cpumask_next(n, src1p)) < nr_cpu_ids) |
53 | if (cpumask_test_cpu(n, src2p)) |
54 | break; |
55 | return n; |
56 | } |
57 | EXPORT_SYMBOL(cpumask_next_and); |
58 | |
59 | /** |
60 | * cpumask_any_but - return a "random" in a cpumask, but not this one. |
61 | * @mask: the cpumask to search |
62 | * @cpu: the cpu to ignore. |
63 | * |
64 | * Often used to find any cpu but smp_processor_id() in a mask. |
65 | * Returns >= nr_cpu_ids if no cpus set. |
66 | */ |
67 | int cpumask_any_but(const struct cpumask *mask, unsigned int cpu) |
68 | { |
69 | unsigned int i; |
70 | |
71 | cpumask_check(cpu); |
72 | for_each_cpu(i, mask) |
73 | if (i != cpu) |
74 | break; |
75 | return i; |
76 | } |
77 | |
78 | /* These are not inline because of header tangles. */ |
79 | #ifdef CONFIG_CPUMASK_OFFSTACK |
80 | /** |
81 | * alloc_cpumask_var_node - allocate a struct cpumask on a given node |
82 | * @mask: pointer to cpumask_var_t where the cpumask is returned |
83 | * @flags: GFP_ flags |
84 | * |
85 | * Only defined when CONFIG_CPUMASK_OFFSTACK=y, otherwise is |
86 | * a nop returning a constant 1 (in <linux/cpumask.h>) |
87 | * Returns TRUE if memory allocation succeeded, FALSE otherwise. |
88 | * |
89 | * In addition, mask will be NULL if this fails. Note that gcc is |
90 | * usually smart enough to know that mask can never be NULL if |
91 | * CONFIG_CPUMASK_OFFSTACK=n, so does code elimination in that case |
92 | * too. |
93 | */ |
94 | bool alloc_cpumask_var_node(cpumask_var_t *mask, gfp_t flags, int node) |
95 | { |
96 | *mask = kmalloc_node(cpumask_size(), flags, node); |
97 | |
98 | #ifdef CONFIG_DEBUG_PER_CPU_MAPS |
99 | if (!*mask) { |
100 | printk(KERN_ERR "=> alloc_cpumask_var: failed!\n"); |
101 | dump_stack(); |
102 | } |
103 | #endif |
104 | /* FIXME: Bandaid to save us from old primitives which go to NR_CPUS. */ |
105 | if (*mask) { |
106 | unsigned char *ptr = (unsigned char *)cpumask_bits(*mask); |
107 | unsigned int tail; |
108 | tail = BITS_TO_LONGS(NR_CPUS - nr_cpumask_bits) * sizeof(long); |
109 | memset(ptr + cpumask_size() - tail, 0, tail); |
110 | } |
111 | |
112 | return *mask != NULL; |
113 | } |
114 | EXPORT_SYMBOL(alloc_cpumask_var_node); |
115 | |
116 | bool zalloc_cpumask_var_node(cpumask_var_t *mask, gfp_t flags, int node) |
117 | { |
118 | return alloc_cpumask_var_node(mask, flags | __GFP_ZERO, node); |
119 | } |
120 | EXPORT_SYMBOL(zalloc_cpumask_var_node); |
121 | |
122 | /** |
123 | * alloc_cpumask_var - allocate a struct cpumask |
124 | * @mask: pointer to cpumask_var_t where the cpumask is returned |
125 | * @flags: GFP_ flags |
126 | * |
127 | * Only defined when CONFIG_CPUMASK_OFFSTACK=y, otherwise is |
128 | * a nop returning a constant 1 (in <linux/cpumask.h>). |
129 | * |
130 | * See alloc_cpumask_var_node. |
131 | */ |
132 | bool alloc_cpumask_var(cpumask_var_t *mask, gfp_t flags) |
133 | { |
134 | return alloc_cpumask_var_node(mask, flags, NUMA_NO_NODE); |
135 | } |
136 | EXPORT_SYMBOL(alloc_cpumask_var); |
137 | |
138 | bool zalloc_cpumask_var(cpumask_var_t *mask, gfp_t flags) |
139 | { |
140 | return alloc_cpumask_var(mask, flags | __GFP_ZERO); |
141 | } |
142 | EXPORT_SYMBOL(zalloc_cpumask_var); |
143 | |
144 | /** |
145 | * alloc_bootmem_cpumask_var - allocate a struct cpumask from the bootmem arena. |
146 | * @mask: pointer to cpumask_var_t where the cpumask is returned |
147 | * |
148 | * Only defined when CONFIG_CPUMASK_OFFSTACK=y, otherwise is |
149 | * a nop (in <linux/cpumask.h>). |
150 | * Either returns an allocated (zero-filled) cpumask, or causes the |
151 | * system to panic. |
152 | */ |
153 | void __init alloc_bootmem_cpumask_var(cpumask_var_t *mask) |
154 | { |
155 | *mask = alloc_bootmem(cpumask_size()); |
156 | } |
157 | |
158 | /** |
159 | * free_cpumask_var - frees memory allocated for a struct cpumask. |
160 | * @mask: cpumask to free |
161 | * |
162 | * This is safe on a NULL mask. |
163 | */ |
164 | void free_cpumask_var(cpumask_var_t mask) |
165 | { |
166 | kfree(mask); |
167 | } |
168 | EXPORT_SYMBOL(free_cpumask_var); |
169 | |
170 | /** |
171 | * free_bootmem_cpumask_var - frees result of alloc_bootmem_cpumask_var |
172 | * @mask: cpumask to free |
173 | */ |
174 | void __init free_bootmem_cpumask_var(cpumask_var_t mask) |
175 | { |
176 | free_bootmem((unsigned long)mask, cpumask_size()); |
177 | } |
178 | #endif |
179 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9