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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | #ifndef __LINUX_CPUMASK_H |
3 | #define __LINUX_CPUMASK_H | |
4 | ||
5 | /* | |
6 | * Cpumasks provide a bitmap suitable for representing the | |
6ba2ef7b RR |
7 | * set of CPU's in a system, one bit position per CPU number. In general, |
8 | * only nr_cpu_ids (<= NR_CPUS) bits are valid. | |
1da177e4 | 9 | */ |
1da177e4 LT |
10 | #include <linux/kernel.h> |
11 | #include <linux/threads.h> | |
12 | #include <linux/bitmap.h> | |
0c09ab96 | 13 | #include <linux/atomic.h> |
187f1882 | 14 | #include <linux/bug.h> |
1da177e4 | 15 | |
cdfdef75 | 16 | /* Don't assign or return these: may not be this big! */ |
2d3854a3 | 17 | typedef struct cpumask { DECLARE_BITMAP(bits, NR_CPUS); } cpumask_t; |
1da177e4 | 18 | |
ae7a47e7 | 19 | /** |
6ba2ef7b RR |
20 | * cpumask_bits - get the bits in a cpumask |
21 | * @maskp: the struct cpumask * | |
ae7a47e7 | 22 | * |
6ba2ef7b RR |
23 | * You should only assume nr_cpu_ids bits of this mask are valid. This is |
24 | * a macro so it's const-correct. | |
ae7a47e7 | 25 | */ |
6ba2ef7b | 26 | #define cpumask_bits(maskp) ((maskp)->bits) |
7ea931c9 | 27 | |
f1bbc032 TH |
28 | /** |
29 | * cpumask_pr_args - printf args to output a cpumask | |
30 | * @maskp: cpumask to be printed | |
31 | * | |
32 | * Can be used to provide arguments for '%*pb[l]' when printing a cpumask. | |
33 | */ | |
34 | #define cpumask_pr_args(maskp) nr_cpu_ids, cpumask_bits(maskp) | |
35 | ||
41df0d61 | 36 | #if NR_CPUS == 1 |
9b130ad5 | 37 | #define nr_cpu_ids 1U |
6ba2ef7b | 38 | #else |
9b130ad5 | 39 | extern unsigned int nr_cpu_ids; |
41df0d61 MT |
40 | #endif |
41 | ||
6ba2ef7b RR |
42 | #ifdef CONFIG_CPUMASK_OFFSTACK |
43 | /* Assuming NR_CPUS is huge, a runtime limit is more efficient. Also, | |
44 | * not all bits may be allocated. */ | |
9b130ad5 | 45 | #define nr_cpumask_bits nr_cpu_ids |
6ba2ef7b | 46 | #else |
c311c797 | 47 | #define nr_cpumask_bits ((unsigned int)NR_CPUS) |
6ba2ef7b | 48 | #endif |
1da177e4 LT |
49 | |
50 | /* | |
51 | * The following particular system cpumasks and operations manage | |
b3199c02 | 52 | * possible, present, active and online cpus. |
1da177e4 | 53 | * |
b3199c02 RR |
54 | * cpu_possible_mask- has bit 'cpu' set iff cpu is populatable |
55 | * cpu_present_mask - has bit 'cpu' set iff cpu is populated | |
56 | * cpu_online_mask - has bit 'cpu' set iff cpu available to scheduler | |
57 | * cpu_active_mask - has bit 'cpu' set iff cpu available to migration | |
1da177e4 | 58 | * |
b3199c02 | 59 | * If !CONFIG_HOTPLUG_CPU, present == possible, and active == online. |
1da177e4 | 60 | * |
b3199c02 RR |
61 | * The cpu_possible_mask is fixed at boot time, as the set of CPU id's |
62 | * that it is possible might ever be plugged in at anytime during the | |
63 | * life of that system boot. The cpu_present_mask is dynamic(*), | |
64 | * representing which CPUs are currently plugged in. And | |
65 | * cpu_online_mask is the dynamic subset of cpu_present_mask, | |
66 | * indicating those CPUs available for scheduling. | |
67 | * | |
68 | * If HOTPLUG is enabled, then cpu_possible_mask is forced to have | |
1da177e4 LT |
69 | * all NR_CPUS bits set, otherwise it is just the set of CPUs that |
70 | * ACPI reports present at boot. | |
71 | * | |
b3199c02 | 72 | * If HOTPLUG is enabled, then cpu_present_mask varies dynamically, |
1da177e4 | 73 | * depending on what ACPI reports as currently plugged in, otherwise |
b3199c02 | 74 | * cpu_present_mask is just a copy of cpu_possible_mask. |
1da177e4 | 75 | * |
b3199c02 RR |
76 | * (*) Well, cpu_present_mask is dynamic in the hotplug case. If not |
77 | * hotplug, it's a copy of cpu_possible_mask, hence fixed at boot. | |
1da177e4 LT |
78 | * |
79 | * Subtleties: | |
80 | * 1) UP arch's (NR_CPUS == 1, CONFIG_SMP not defined) hardcode | |
81 | * assumption that their single CPU is online. The UP | |
b3199c02 | 82 | * cpu_{online,possible,present}_masks are placebos. Changing them |
1da177e4 LT |
83 | * will have no useful affect on the following num_*_cpus() |
84 | * and cpu_*() macros in the UP case. This ugliness is a UP | |
85 | * optimization - don't waste any instructions or memory references | |
86 | * asking if you're online or how many CPUs there are if there is | |
87 | * only one CPU. | |
1da177e4 LT |
88 | */ |
89 | ||
4b804c85 RV |
90 | extern struct cpumask __cpu_possible_mask; |
91 | extern struct cpumask __cpu_online_mask; | |
92 | extern struct cpumask __cpu_present_mask; | |
93 | extern struct cpumask __cpu_active_mask; | |
e40f74c5 | 94 | extern struct cpumask __cpu_dying_mask; |
5aec01b8 RV |
95 | #define cpu_possible_mask ((const struct cpumask *)&__cpu_possible_mask) |
96 | #define cpu_online_mask ((const struct cpumask *)&__cpu_online_mask) | |
97 | #define cpu_present_mask ((const struct cpumask *)&__cpu_present_mask) | |
98 | #define cpu_active_mask ((const struct cpumask *)&__cpu_active_mask) | |
e40f74c5 | 99 | #define cpu_dying_mask ((const struct cpumask *)&__cpu_dying_mask) |
b3199c02 | 100 | |
0c09ab96 TG |
101 | extern atomic_t __num_online_cpus; |
102 | ||
e797bda3 TG |
103 | extern cpumask_t cpus_booted_once_mask; |
104 | ||
80d19669 | 105 | static inline void cpu_max_bits_warn(unsigned int cpu, unsigned int bits) |
2d3854a3 RR |
106 | { |
107 | #ifdef CONFIG_DEBUG_PER_CPU_MAPS | |
80d19669 | 108 | WARN_ON_ONCE(cpu >= bits); |
2d3854a3 | 109 | #endif /* CONFIG_DEBUG_PER_CPU_MAPS */ |
80d19669 AN |
110 | } |
111 | ||
112 | /* verify cpu argument to cpumask_* operators */ | |
113 | static inline unsigned int cpumask_check(unsigned int cpu) | |
114 | { | |
115 | cpu_max_bits_warn(cpu, nr_cpumask_bits); | |
2d3854a3 RR |
116 | return cpu; |
117 | } | |
118 | ||
119 | #if NR_CPUS == 1 | |
984f2f37 RR |
120 | /* Uniprocessor. Assume all masks are "1". */ |
121 | static inline unsigned int cpumask_first(const struct cpumask *srcp) | |
122 | { | |
123 | return 0; | |
124 | } | |
125 | ||
e22cdc3f RM |
126 | static inline unsigned int cpumask_last(const struct cpumask *srcp) |
127 | { | |
128 | return 0; | |
129 | } | |
130 | ||
984f2f37 RR |
131 | /* Valid inputs for n are -1 and 0. */ |
132 | static inline unsigned int cpumask_next(int n, const struct cpumask *srcp) | |
133 | { | |
134 | return n+1; | |
135 | } | |
136 | ||
137 | static inline unsigned int cpumask_next_zero(int n, const struct cpumask *srcp) | |
138 | { | |
139 | return n+1; | |
140 | } | |
141 | ||
142 | static inline unsigned int cpumask_next_and(int n, | |
143 | const struct cpumask *srcp, | |
144 | const struct cpumask *andp) | |
145 | { | |
146 | return n+1; | |
147 | } | |
148 | ||
9af18e56 WB |
149 | static inline unsigned int cpumask_next_wrap(int n, const struct cpumask *mask, |
150 | int start, bool wrap) | |
151 | { | |
152 | /* cpu0 unless stop condition, wrap and at cpu0, then nr_cpumask_bits */ | |
153 | return (wrap && n == 0); | |
154 | } | |
155 | ||
984f2f37 RR |
156 | /* cpu must be a valid cpu, ie 0, so there's no other choice. */ |
157 | static inline unsigned int cpumask_any_but(const struct cpumask *mask, | |
158 | unsigned int cpu) | |
159 | { | |
160 | return 1; | |
161 | } | |
2d3854a3 | 162 | |
f36963c9 | 163 | static inline unsigned int cpumask_local_spread(unsigned int i, int node) |
da91309e | 164 | { |
da91309e AV |
165 | return 0; |
166 | } | |
167 | ||
46a87b38 PT |
168 | static inline int cpumask_any_and_distribute(const struct cpumask *src1p, |
169 | const struct cpumask *src2p) { | |
170 | return cpumask_next_and(-1, src1p, src2p); | |
171 | } | |
172 | ||
14e292f8 PZ |
173 | static inline int cpumask_any_distribute(const struct cpumask *srcp) |
174 | { | |
175 | return cpumask_first(srcp); | |
176 | } | |
177 | ||
2d3854a3 RR |
178 | #define for_each_cpu(cpu, mask) \ |
179 | for ((cpu) = 0; (cpu) < 1; (cpu)++, (void)mask) | |
8bd93a2c PM |
180 | #define for_each_cpu_not(cpu, mask) \ |
181 | for ((cpu) = 0; (cpu) < 1; (cpu)++, (void)mask) | |
d207af2e MK |
182 | #define for_each_cpu_wrap(cpu, mask, start) \ |
183 | for ((cpu) = 0; (cpu) < 1; (cpu)++, (void)mask, (void)(start)) | |
2a4a4082 AD |
184 | #define for_each_cpu_and(cpu, mask1, mask2) \ |
185 | for ((cpu) = 0; (cpu) < 1; (cpu)++, (void)mask1, (void)mask2) | |
2d3854a3 RR |
186 | #else |
187 | /** | |
188 | * cpumask_first - get the first cpu in a cpumask | |
189 | * @srcp: the cpumask pointer | |
190 | * | |
191 | * Returns >= nr_cpu_ids if no cpus set. | |
192 | */ | |
193 | static inline unsigned int cpumask_first(const struct cpumask *srcp) | |
194 | { | |
195 | return find_first_bit(cpumask_bits(srcp), nr_cpumask_bits); | |
196 | } | |
197 | ||
e22cdc3f RM |
198 | /** |
199 | * cpumask_last - get the last CPU in a cpumask | |
200 | * @srcp: - the cpumask pointer | |
201 | * | |
202 | * Returns >= nr_cpumask_bits if no CPUs set. | |
203 | */ | |
204 | static inline unsigned int cpumask_last(const struct cpumask *srcp) | |
205 | { | |
206 | return find_last_bit(cpumask_bits(srcp), nr_cpumask_bits); | |
207 | } | |
208 | ||
291c4011 | 209 | unsigned int __pure cpumask_next(int n, const struct cpumask *srcp); |
2d3854a3 RR |
210 | |
211 | /** | |
212 | * cpumask_next_zero - get the next unset cpu in a cpumask | |
213 | * @n: the cpu prior to the place to search (ie. return will be > @n) | |
214 | * @srcp: the cpumask pointer | |
215 | * | |
216 | * Returns >= nr_cpu_ids if no further cpus unset. | |
217 | */ | |
218 | static inline unsigned int cpumask_next_zero(int n, const struct cpumask *srcp) | |
219 | { | |
220 | /* -1 is a legal arg here. */ | |
221 | if (n != -1) | |
222 | cpumask_check(n); | |
223 | return find_next_zero_bit(cpumask_bits(srcp), nr_cpumask_bits, n+1); | |
224 | } | |
225 | ||
291c4011 NA |
226 | int __pure cpumask_next_and(int n, const struct cpumask *, const struct cpumask *); |
227 | int __pure cpumask_any_but(const struct cpumask *mask, unsigned int cpu); | |
f36963c9 | 228 | unsigned int cpumask_local_spread(unsigned int i, int node); |
46a87b38 PT |
229 | int cpumask_any_and_distribute(const struct cpumask *src1p, |
230 | const struct cpumask *src2p); | |
14e292f8 | 231 | int cpumask_any_distribute(const struct cpumask *srcp); |
2d3854a3 | 232 | |
984f2f37 RR |
233 | /** |
234 | * for_each_cpu - iterate over every cpu in a mask | |
235 | * @cpu: the (optionally unsigned) integer iterator | |
236 | * @mask: the cpumask pointer | |
237 | * | |
238 | * After the loop, cpu is >= nr_cpu_ids. | |
239 | */ | |
2d3854a3 RR |
240 | #define for_each_cpu(cpu, mask) \ |
241 | for ((cpu) = -1; \ | |
242 | (cpu) = cpumask_next((cpu), (mask)), \ | |
243 | (cpu) < nr_cpu_ids;) | |
984f2f37 | 244 | |
8bd93a2c PM |
245 | /** |
246 | * for_each_cpu_not - iterate over every cpu in a complemented mask | |
247 | * @cpu: the (optionally unsigned) integer iterator | |
248 | * @mask: the cpumask pointer | |
249 | * | |
250 | * After the loop, cpu is >= nr_cpu_ids. | |
251 | */ | |
252 | #define for_each_cpu_not(cpu, mask) \ | |
253 | for ((cpu) = -1; \ | |
254 | (cpu) = cpumask_next_zero((cpu), (mask)), \ | |
255 | (cpu) < nr_cpu_ids;) | |
256 | ||
c743f0a5 PZ |
257 | extern int cpumask_next_wrap(int n, const struct cpumask *mask, int start, bool wrap); |
258 | ||
259 | /** | |
260 | * for_each_cpu_wrap - iterate over every cpu in a mask, starting at a specified location | |
261 | * @cpu: the (optionally unsigned) integer iterator | |
262 | * @mask: the cpumask poiter | |
263 | * @start: the start location | |
264 | * | |
265 | * The implementation does not assume any bit in @mask is set (including @start). | |
266 | * | |
267 | * After the loop, cpu is >= nr_cpu_ids. | |
268 | */ | |
269 | #define for_each_cpu_wrap(cpu, mask, start) \ | |
270 | for ((cpu) = cpumask_next_wrap((start)-1, (mask), (start), false); \ | |
271 | (cpu) < nr_cpumask_bits; \ | |
272 | (cpu) = cpumask_next_wrap((cpu), (mask), (start), true)) | |
273 | ||
984f2f37 RR |
274 | /** |
275 | * for_each_cpu_and - iterate over every cpu in both masks | |
276 | * @cpu: the (optionally unsigned) integer iterator | |
2a4a4082 AD |
277 | * @mask1: the first cpumask pointer |
278 | * @mask2: the second cpumask pointer | |
984f2f37 RR |
279 | * |
280 | * This saves a temporary CPU mask in many places. It is equivalent to: | |
281 | * struct cpumask tmp; | |
2a4a4082 | 282 | * cpumask_and(&tmp, &mask1, &mask2); |
984f2f37 RR |
283 | * for_each_cpu(cpu, &tmp) |
284 | * ... | |
285 | * | |
286 | * After the loop, cpu is >= nr_cpu_ids. | |
287 | */ | |
2a4a4082 | 288 | #define for_each_cpu_and(cpu, mask1, mask2) \ |
2d3854a3 | 289 | for ((cpu) = -1; \ |
2a4a4082 | 290 | (cpu) = cpumask_next_and((cpu), (mask1), (mask2)), \ |
2d3854a3 RR |
291 | (cpu) < nr_cpu_ids;) |
292 | #endif /* SMP */ | |
293 | ||
294 | #define CPU_BITS_NONE \ | |
295 | { \ | |
296 | [0 ... BITS_TO_LONGS(NR_CPUS)-1] = 0UL \ | |
297 | } | |
298 | ||
299 | #define CPU_BITS_CPU0 \ | |
300 | { \ | |
301 | [0] = 1UL \ | |
302 | } | |
303 | ||
304 | /** | |
305 | * cpumask_set_cpu - set a cpu in a cpumask | |
306 | * @cpu: cpu number (< nr_cpu_ids) | |
307 | * @dstp: the cpumask pointer | |
308 | */ | |
309 | static inline void cpumask_set_cpu(unsigned int cpu, struct cpumask *dstp) | |
310 | { | |
311 | set_bit(cpumask_check(cpu), cpumask_bits(dstp)); | |
312 | } | |
313 | ||
6c8557bd PZ |
314 | static inline void __cpumask_set_cpu(unsigned int cpu, struct cpumask *dstp) |
315 | { | |
316 | __set_bit(cpumask_check(cpu), cpumask_bits(dstp)); | |
317 | } | |
318 | ||
319 | ||
2d3854a3 RR |
320 | /** |
321 | * cpumask_clear_cpu - clear a cpu in a cpumask | |
322 | * @cpu: cpu number (< nr_cpu_ids) | |
323 | * @dstp: the cpumask pointer | |
324 | */ | |
325 | static inline void cpumask_clear_cpu(int cpu, struct cpumask *dstp) | |
326 | { | |
327 | clear_bit(cpumask_check(cpu), cpumask_bits(dstp)); | |
328 | } | |
329 | ||
6c8557bd PZ |
330 | static inline void __cpumask_clear_cpu(int cpu, struct cpumask *dstp) |
331 | { | |
332 | __clear_bit(cpumask_check(cpu), cpumask_bits(dstp)); | |
333 | } | |
334 | ||
2d3854a3 RR |
335 | /** |
336 | * cpumask_test_cpu - test for a cpu in a cpumask | |
337 | * @cpu: cpu number (< nr_cpu_ids) | |
338 | * @cpumask: the cpumask pointer | |
339 | * | |
c777ad69 | 340 | * Returns 1 if @cpu is set in @cpumask, else returns 0 |
2d3854a3 | 341 | */ |
3bbf7f46 RV |
342 | static inline int cpumask_test_cpu(int cpu, const struct cpumask *cpumask) |
343 | { | |
344 | return test_bit(cpumask_check(cpu), cpumask_bits((cpumask))); | |
345 | } | |
2d3854a3 RR |
346 | |
347 | /** | |
348 | * cpumask_test_and_set_cpu - atomically test and set a cpu in a cpumask | |
349 | * @cpu: cpu number (< nr_cpu_ids) | |
350 | * @cpumask: the cpumask pointer | |
351 | * | |
c777ad69 AS |
352 | * Returns 1 if @cpu is set in old bitmap of @cpumask, else returns 0 |
353 | * | |
2d3854a3 RR |
354 | * test_and_set_bit wrapper for cpumasks. |
355 | */ | |
356 | static inline int cpumask_test_and_set_cpu(int cpu, struct cpumask *cpumask) | |
357 | { | |
358 | return test_and_set_bit(cpumask_check(cpu), cpumask_bits(cpumask)); | |
359 | } | |
360 | ||
54fdade1 XG |
361 | /** |
362 | * cpumask_test_and_clear_cpu - atomically test and clear a cpu in a cpumask | |
363 | * @cpu: cpu number (< nr_cpu_ids) | |
364 | * @cpumask: the cpumask pointer | |
365 | * | |
c777ad69 AS |
366 | * Returns 1 if @cpu is set in old bitmap of @cpumask, else returns 0 |
367 | * | |
54fdade1 XG |
368 | * test_and_clear_bit wrapper for cpumasks. |
369 | */ | |
370 | static inline int cpumask_test_and_clear_cpu(int cpu, struct cpumask *cpumask) | |
371 | { | |
372 | return test_and_clear_bit(cpumask_check(cpu), cpumask_bits(cpumask)); | |
373 | } | |
374 | ||
2d3854a3 RR |
375 | /** |
376 | * cpumask_setall - set all cpus (< nr_cpu_ids) in a cpumask | |
377 | * @dstp: the cpumask pointer | |
378 | */ | |
379 | static inline void cpumask_setall(struct cpumask *dstp) | |
380 | { | |
381 | bitmap_fill(cpumask_bits(dstp), nr_cpumask_bits); | |
382 | } | |
383 | ||
384 | /** | |
385 | * cpumask_clear - clear all cpus (< nr_cpu_ids) in a cpumask | |
386 | * @dstp: the cpumask pointer | |
387 | */ | |
388 | static inline void cpumask_clear(struct cpumask *dstp) | |
389 | { | |
390 | bitmap_zero(cpumask_bits(dstp), nr_cpumask_bits); | |
391 | } | |
392 | ||
393 | /** | |
394 | * cpumask_and - *dstp = *src1p & *src2p | |
395 | * @dstp: the cpumask result | |
396 | * @src1p: the first input | |
397 | * @src2p: the second input | |
c777ad69 AS |
398 | * |
399 | * If *@dstp is empty, returns 0, else returns 1 | |
2d3854a3 | 400 | */ |
f4b0373b | 401 | static inline int cpumask_and(struct cpumask *dstp, |
2d3854a3 RR |
402 | const struct cpumask *src1p, |
403 | const struct cpumask *src2p) | |
404 | { | |
f4b0373b | 405 | return bitmap_and(cpumask_bits(dstp), cpumask_bits(src1p), |
2d3854a3 RR |
406 | cpumask_bits(src2p), nr_cpumask_bits); |
407 | } | |
408 | ||
409 | /** | |
410 | * cpumask_or - *dstp = *src1p | *src2p | |
411 | * @dstp: the cpumask result | |
412 | * @src1p: the first input | |
413 | * @src2p: the second input | |
414 | */ | |
415 | static inline void cpumask_or(struct cpumask *dstp, const struct cpumask *src1p, | |
416 | const struct cpumask *src2p) | |
417 | { | |
418 | bitmap_or(cpumask_bits(dstp), cpumask_bits(src1p), | |
419 | cpumask_bits(src2p), nr_cpumask_bits); | |
420 | } | |
421 | ||
422 | /** | |
423 | * cpumask_xor - *dstp = *src1p ^ *src2p | |
424 | * @dstp: the cpumask result | |
425 | * @src1p: the first input | |
426 | * @src2p: the second input | |
427 | */ | |
428 | static inline void cpumask_xor(struct cpumask *dstp, | |
429 | const struct cpumask *src1p, | |
430 | const struct cpumask *src2p) | |
431 | { | |
432 | bitmap_xor(cpumask_bits(dstp), cpumask_bits(src1p), | |
433 | cpumask_bits(src2p), nr_cpumask_bits); | |
434 | } | |
435 | ||
436 | /** | |
437 | * cpumask_andnot - *dstp = *src1p & ~*src2p | |
438 | * @dstp: the cpumask result | |
439 | * @src1p: the first input | |
440 | * @src2p: the second input | |
c777ad69 AS |
441 | * |
442 | * If *@dstp is empty, returns 0, else returns 1 | |
2d3854a3 | 443 | */ |
f4b0373b | 444 | static inline int cpumask_andnot(struct cpumask *dstp, |
2d3854a3 RR |
445 | const struct cpumask *src1p, |
446 | const struct cpumask *src2p) | |
447 | { | |
f4b0373b | 448 | return bitmap_andnot(cpumask_bits(dstp), cpumask_bits(src1p), |
2d3854a3 RR |
449 | cpumask_bits(src2p), nr_cpumask_bits); |
450 | } | |
451 | ||
452 | /** | |
453 | * cpumask_complement - *dstp = ~*srcp | |
454 | * @dstp: the cpumask result | |
455 | * @srcp: the input to invert | |
456 | */ | |
457 | static inline void cpumask_complement(struct cpumask *dstp, | |
458 | const struct cpumask *srcp) | |
459 | { | |
460 | bitmap_complement(cpumask_bits(dstp), cpumask_bits(srcp), | |
461 | nr_cpumask_bits); | |
462 | } | |
463 | ||
464 | /** | |
465 | * cpumask_equal - *src1p == *src2p | |
466 | * @src1p: the first input | |
467 | * @src2p: the second input | |
468 | */ | |
469 | static inline bool cpumask_equal(const struct cpumask *src1p, | |
470 | const struct cpumask *src2p) | |
471 | { | |
472 | return bitmap_equal(cpumask_bits(src1p), cpumask_bits(src2p), | |
473 | nr_cpumask_bits); | |
474 | } | |
475 | ||
b9fa6442 TG |
476 | /** |
477 | * cpumask_or_equal - *src1p | *src2p == *src3p | |
478 | * @src1p: the first input | |
479 | * @src2p: the second input | |
480 | * @src3p: the third input | |
481 | */ | |
482 | static inline bool cpumask_or_equal(const struct cpumask *src1p, | |
483 | const struct cpumask *src2p, | |
484 | const struct cpumask *src3p) | |
485 | { | |
486 | return bitmap_or_equal(cpumask_bits(src1p), cpumask_bits(src2p), | |
487 | cpumask_bits(src3p), nr_cpumask_bits); | |
488 | } | |
489 | ||
2d3854a3 RR |
490 | /** |
491 | * cpumask_intersects - (*src1p & *src2p) != 0 | |
492 | * @src1p: the first input | |
493 | * @src2p: the second input | |
494 | */ | |
495 | static inline bool cpumask_intersects(const struct cpumask *src1p, | |
496 | const struct cpumask *src2p) | |
497 | { | |
498 | return bitmap_intersects(cpumask_bits(src1p), cpumask_bits(src2p), | |
499 | nr_cpumask_bits); | |
500 | } | |
501 | ||
502 | /** | |
503 | * cpumask_subset - (*src1p & ~*src2p) == 0 | |
504 | * @src1p: the first input | |
505 | * @src2p: the second input | |
c777ad69 AS |
506 | * |
507 | * Returns 1 if *@src1p is a subset of *@src2p, else returns 0 | |
2d3854a3 RR |
508 | */ |
509 | static inline int cpumask_subset(const struct cpumask *src1p, | |
510 | const struct cpumask *src2p) | |
511 | { | |
512 | return bitmap_subset(cpumask_bits(src1p), cpumask_bits(src2p), | |
513 | nr_cpumask_bits); | |
514 | } | |
515 | ||
516 | /** | |
517 | * cpumask_empty - *srcp == 0 | |
518 | * @srcp: the cpumask to that all cpus < nr_cpu_ids are clear. | |
519 | */ | |
520 | static inline bool cpumask_empty(const struct cpumask *srcp) | |
521 | { | |
522 | return bitmap_empty(cpumask_bits(srcp), nr_cpumask_bits); | |
523 | } | |
524 | ||
525 | /** | |
526 | * cpumask_full - *srcp == 0xFFFFFFFF... | |
527 | * @srcp: the cpumask to that all cpus < nr_cpu_ids are set. | |
528 | */ | |
529 | static inline bool cpumask_full(const struct cpumask *srcp) | |
530 | { | |
531 | return bitmap_full(cpumask_bits(srcp), nr_cpumask_bits); | |
532 | } | |
533 | ||
534 | /** | |
535 | * cpumask_weight - Count of bits in *srcp | |
536 | * @srcp: the cpumask to count bits (< nr_cpu_ids) in. | |
537 | */ | |
538 | static inline unsigned int cpumask_weight(const struct cpumask *srcp) | |
539 | { | |
540 | return bitmap_weight(cpumask_bits(srcp), nr_cpumask_bits); | |
541 | } | |
542 | ||
543 | /** | |
544 | * cpumask_shift_right - *dstp = *srcp >> n | |
545 | * @dstp: the cpumask result | |
546 | * @srcp: the input to shift | |
547 | * @n: the number of bits to shift by | |
548 | */ | |
549 | static inline void cpumask_shift_right(struct cpumask *dstp, | |
550 | const struct cpumask *srcp, int n) | |
551 | { | |
552 | bitmap_shift_right(cpumask_bits(dstp), cpumask_bits(srcp), n, | |
553 | nr_cpumask_bits); | |
554 | } | |
555 | ||
556 | /** | |
557 | * cpumask_shift_left - *dstp = *srcp << n | |
558 | * @dstp: the cpumask result | |
559 | * @srcp: the input to shift | |
560 | * @n: the number of bits to shift by | |
561 | */ | |
562 | static inline void cpumask_shift_left(struct cpumask *dstp, | |
563 | const struct cpumask *srcp, int n) | |
564 | { | |
565 | bitmap_shift_left(cpumask_bits(dstp), cpumask_bits(srcp), n, | |
566 | nr_cpumask_bits); | |
567 | } | |
568 | ||
569 | /** | |
570 | * cpumask_copy - *dstp = *srcp | |
571 | * @dstp: the result | |
572 | * @srcp: the input cpumask | |
573 | */ | |
574 | static inline void cpumask_copy(struct cpumask *dstp, | |
575 | const struct cpumask *srcp) | |
576 | { | |
577 | bitmap_copy(cpumask_bits(dstp), cpumask_bits(srcp), nr_cpumask_bits); | |
578 | } | |
579 | ||
580 | /** | |
581 | * cpumask_any - pick a "random" cpu from *srcp | |
582 | * @srcp: the input cpumask | |
583 | * | |
584 | * Returns >= nr_cpu_ids if no cpus set. | |
585 | */ | |
586 | #define cpumask_any(srcp) cpumask_first(srcp) | |
587 | ||
588 | /** | |
589 | * cpumask_first_and - return the first cpu from *srcp1 & *srcp2 | |
590 | * @src1p: the first input | |
591 | * @src2p: the second input | |
592 | * | |
593 | * Returns >= nr_cpu_ids if no cpus set in both. See also cpumask_next_and(). | |
594 | */ | |
595 | #define cpumask_first_and(src1p, src2p) cpumask_next_and(-1, (src1p), (src2p)) | |
596 | ||
597 | /** | |
598 | * cpumask_any_and - pick a "random" cpu from *mask1 & *mask2 | |
599 | * @mask1: the first input cpumask | |
600 | * @mask2: the second input cpumask | |
601 | * | |
602 | * Returns >= nr_cpu_ids if no cpus set. | |
603 | */ | |
604 | #define cpumask_any_and(mask1, mask2) cpumask_first_and((mask1), (mask2)) | |
605 | ||
cd83e42c RR |
606 | /** |
607 | * cpumask_of - the cpumask containing just a given cpu | |
608 | * @cpu: the cpu (<= nr_cpu_ids) | |
609 | */ | |
610 | #define cpumask_of(cpu) (get_cpu_mask(cpu)) | |
611 | ||
29c0177e RR |
612 | /** |
613 | * cpumask_parse_user - extract a cpumask from a user string | |
614 | * @buf: the buffer to extract from | |
615 | * @len: the length of the buffer | |
616 | * @dstp: the cpumask to set. | |
617 | * | |
618 | * Returns -errno, or 0 for success. | |
619 | */ | |
620 | static inline int cpumask_parse_user(const char __user *buf, int len, | |
621 | struct cpumask *dstp) | |
622 | { | |
4d59b6cc | 623 | return bitmap_parse_user(buf, len, cpumask_bits(dstp), nr_cpumask_bits); |
29c0177e RR |
624 | } |
625 | ||
4b060420 MT |
626 | /** |
627 | * cpumask_parselist_user - extract a cpumask from a user string | |
628 | * @buf: the buffer to extract from | |
629 | * @len: the length of the buffer | |
630 | * @dstp: the cpumask to set. | |
631 | * | |
632 | * Returns -errno, or 0 for success. | |
633 | */ | |
634 | static inline int cpumask_parselist_user(const char __user *buf, int len, | |
635 | struct cpumask *dstp) | |
636 | { | |
637 | return bitmap_parselist_user(buf, len, cpumask_bits(dstp), | |
4d59b6cc | 638 | nr_cpumask_bits); |
4b060420 MT |
639 | } |
640 | ||
ba630e49 | 641 | /** |
b06fb415 | 642 | * cpumask_parse - extract a cpumask from a string |
ba630e49 TH |
643 | * @buf: the buffer to extract from |
644 | * @dstp: the cpumask to set. | |
645 | * | |
646 | * Returns -errno, or 0 for success. | |
647 | */ | |
648 | static inline int cpumask_parse(const char *buf, struct cpumask *dstp) | |
649 | { | |
190535f7 | 650 | return bitmap_parse(buf, UINT_MAX, cpumask_bits(dstp), nr_cpumask_bits); |
ba630e49 TH |
651 | } |
652 | ||
29c0177e | 653 | /** |
231daf07 | 654 | * cpulist_parse - extract a cpumask from a user string of ranges |
29c0177e | 655 | * @buf: the buffer to extract from |
29c0177e RR |
656 | * @dstp: the cpumask to set. |
657 | * | |
658 | * Returns -errno, or 0 for success. | |
659 | */ | |
660 | static inline int cpulist_parse(const char *buf, struct cpumask *dstp) | |
661 | { | |
4d59b6cc | 662 | return bitmap_parselist(buf, cpumask_bits(dstp), nr_cpumask_bits); |
2d3854a3 RR |
663 | } |
664 | ||
665 | /** | |
666 | * cpumask_size - size to allocate for a 'struct cpumask' in bytes | |
2d3854a3 | 667 | */ |
4de373a1 | 668 | static inline unsigned int cpumask_size(void) |
2d3854a3 | 669 | { |
cdfdef75 | 670 | return BITS_TO_LONGS(nr_cpumask_bits) * sizeof(long); |
2d3854a3 RR |
671 | } |
672 | ||
673 | /* | |
674 | * cpumask_var_t: struct cpumask for stack usage. | |
675 | * | |
676 | * Oh, the wicked games we play! In order to make kernel coding a | |
677 | * little more difficult, we typedef cpumask_var_t to an array or a | |
678 | * pointer: doing &mask on an array is a noop, so it still works. | |
679 | * | |
680 | * ie. | |
681 | * cpumask_var_t tmpmask; | |
682 | * if (!alloc_cpumask_var(&tmpmask, GFP_KERNEL)) | |
683 | * return -ENOMEM; | |
684 | * | |
685 | * ... use 'tmpmask' like a normal struct cpumask * ... | |
686 | * | |
687 | * free_cpumask_var(tmpmask); | |
a64a26e8 KM |
688 | * |
689 | * | |
690 | * However, one notable exception is there. alloc_cpumask_var() allocates | |
691 | * only nr_cpumask_bits bits (in the other hand, real cpumask_t always has | |
692 | * NR_CPUS bits). Therefore you don't have to dereference cpumask_var_t. | |
693 | * | |
694 | * cpumask_var_t tmpmask; | |
695 | * if (!alloc_cpumask_var(&tmpmask, GFP_KERNEL)) | |
696 | * return -ENOMEM; | |
697 | * | |
698 | * var = *tmpmask; | |
699 | * | |
700 | * This code makes NR_CPUS length memcopy and brings to a memory corruption. | |
701 | * cpumask_copy() provide safe copy functionality. | |
4ba29684 CL |
702 | * |
703 | * Note that there is another evil here: If you define a cpumask_var_t | |
704 | * as a percpu variable then the way to obtain the address of the cpumask | |
705 | * structure differently influences what this_cpu_* operation needs to be | |
706 | * used. Please use this_cpu_cpumask_var_t in those cases. The direct use | |
707 | * of this_cpu_ptr() or this_cpu_read() will lead to failures when the | |
708 | * other type of cpumask_var_t implementation is configured. | |
668802c2 WL |
709 | * |
710 | * Please also note that __cpumask_var_read_mostly can be used to declare | |
711 | * a cpumask_var_t variable itself (not its content) as read mostly. | |
2d3854a3 RR |
712 | */ |
713 | #ifdef CONFIG_CPUMASK_OFFSTACK | |
714 | typedef struct cpumask *cpumask_var_t; | |
715 | ||
668802c2 WL |
716 | #define this_cpu_cpumask_var_ptr(x) this_cpu_read(x) |
717 | #define __cpumask_var_read_mostly __read_mostly | |
4ba29684 | 718 | |
7b4967c5 | 719 | bool alloc_cpumask_var_node(cpumask_var_t *mask, gfp_t flags, int node); |
2d3854a3 | 720 | bool alloc_cpumask_var(cpumask_var_t *mask, gfp_t flags); |
0281b5dc YL |
721 | bool zalloc_cpumask_var_node(cpumask_var_t *mask, gfp_t flags, int node); |
722 | bool zalloc_cpumask_var(cpumask_var_t *mask, gfp_t flags); | |
2d3854a3 RR |
723 | void alloc_bootmem_cpumask_var(cpumask_var_t *mask); |
724 | void free_cpumask_var(cpumask_var_t mask); | |
cd83e42c | 725 | void free_bootmem_cpumask_var(cpumask_var_t mask); |
2d3854a3 | 726 | |
f7e30f01 MK |
727 | static inline bool cpumask_available(cpumask_var_t mask) |
728 | { | |
729 | return mask != NULL; | |
730 | } | |
731 | ||
2d3854a3 RR |
732 | #else |
733 | typedef struct cpumask cpumask_var_t[1]; | |
734 | ||
4ba29684 | 735 | #define this_cpu_cpumask_var_ptr(x) this_cpu_ptr(x) |
668802c2 | 736 | #define __cpumask_var_read_mostly |
4ba29684 | 737 | |
2d3854a3 RR |
738 | static inline bool alloc_cpumask_var(cpumask_var_t *mask, gfp_t flags) |
739 | { | |
740 | return true; | |
741 | } | |
742 | ||
7b4967c5 MT |
743 | static inline bool alloc_cpumask_var_node(cpumask_var_t *mask, gfp_t flags, |
744 | int node) | |
745 | { | |
746 | return true; | |
747 | } | |
748 | ||
0281b5dc YL |
749 | static inline bool zalloc_cpumask_var(cpumask_var_t *mask, gfp_t flags) |
750 | { | |
751 | cpumask_clear(*mask); | |
752 | return true; | |
753 | } | |
754 | ||
755 | static inline bool zalloc_cpumask_var_node(cpumask_var_t *mask, gfp_t flags, | |
756 | int node) | |
757 | { | |
758 | cpumask_clear(*mask); | |
759 | return true; | |
760 | } | |
761 | ||
2d3854a3 RR |
762 | static inline void alloc_bootmem_cpumask_var(cpumask_var_t *mask) |
763 | { | |
764 | } | |
765 | ||
766 | static inline void free_cpumask_var(cpumask_var_t mask) | |
767 | { | |
768 | } | |
cd83e42c RR |
769 | |
770 | static inline void free_bootmem_cpumask_var(cpumask_var_t mask) | |
771 | { | |
772 | } | |
f7e30f01 MK |
773 | |
774 | static inline bool cpumask_available(cpumask_var_t mask) | |
775 | { | |
776 | return true; | |
777 | } | |
2d3854a3 RR |
778 | #endif /* CONFIG_CPUMASK_OFFSTACK */ |
779 | ||
2d3854a3 RR |
780 | /* It's common to want to use cpu_all_mask in struct member initializers, |
781 | * so it has to refer to an address rather than a pointer. */ | |
782 | extern const DECLARE_BITMAP(cpu_all_bits, NR_CPUS); | |
783 | #define cpu_all_mask to_cpumask(cpu_all_bits) | |
784 | ||
785 | /* First bits of cpu_bit_bitmap are in fact unset. */ | |
786 | #define cpu_none_mask to_cpumask(cpu_bit_bitmap[0]) | |
787 | ||
ae7a47e7 RR |
788 | #define for_each_possible_cpu(cpu) for_each_cpu((cpu), cpu_possible_mask) |
789 | #define for_each_online_cpu(cpu) for_each_cpu((cpu), cpu_online_mask) | |
790 | #define for_each_present_cpu(cpu) for_each_cpu((cpu), cpu_present_mask) | |
791 | ||
2d3854a3 | 792 | /* Wrappers for arch boot code to manipulate normally-constant masks */ |
3fa41520 RR |
793 | void init_cpu_present(const struct cpumask *src); |
794 | void init_cpu_possible(const struct cpumask *src); | |
795 | void init_cpu_online(const struct cpumask *src); | |
6ba2ef7b | 796 | |
427d77a3 TG |
797 | static inline void reset_cpu_possible_mask(void) |
798 | { | |
799 | bitmap_zero(cpumask_bits(&__cpu_possible_mask), NR_CPUS); | |
800 | } | |
801 | ||
9425676a RV |
802 | static inline void |
803 | set_cpu_possible(unsigned int cpu, bool possible) | |
804 | { | |
805 | if (possible) | |
806 | cpumask_set_cpu(cpu, &__cpu_possible_mask); | |
807 | else | |
808 | cpumask_clear_cpu(cpu, &__cpu_possible_mask); | |
809 | } | |
810 | ||
811 | static inline void | |
812 | set_cpu_present(unsigned int cpu, bool present) | |
813 | { | |
814 | if (present) | |
815 | cpumask_set_cpu(cpu, &__cpu_present_mask); | |
816 | else | |
817 | cpumask_clear_cpu(cpu, &__cpu_present_mask); | |
818 | } | |
819 | ||
0c09ab96 | 820 | void set_cpu_online(unsigned int cpu, bool online); |
9425676a RV |
821 | |
822 | static inline void | |
823 | set_cpu_active(unsigned int cpu, bool active) | |
824 | { | |
825 | if (active) | |
826 | cpumask_set_cpu(cpu, &__cpu_active_mask); | |
827 | else | |
828 | cpumask_clear_cpu(cpu, &__cpu_active_mask); | |
829 | } | |
830 | ||
e40f74c5 PZ |
831 | static inline void |
832 | set_cpu_dying(unsigned int cpu, bool dying) | |
833 | { | |
834 | if (dying) | |
835 | cpumask_set_cpu(cpu, &__cpu_dying_mask); | |
836 | else | |
837 | cpumask_clear_cpu(cpu, &__cpu_dying_mask); | |
838 | } | |
9425676a | 839 | |
6ba2ef7b RR |
840 | /** |
841 | * to_cpumask - convert an NR_CPUS bitmap to a struct cpumask * | |
842 | * @bitmap: the bitmap | |
843 | * | |
844 | * There are a few places where cpumask_var_t isn't appropriate and | |
845 | * static cpumasks must be used (eg. very early boot), yet we don't | |
846 | * expose the definition of 'struct cpumask'. | |
847 | * | |
848 | * This does the conversion, and can be used as a constant initializer. | |
849 | */ | |
850 | #define to_cpumask(bitmap) \ | |
851 | ((struct cpumask *)(1 ? (bitmap) \ | |
852 | : (void *)sizeof(__check_is_bitmap(bitmap)))) | |
853 | ||
854 | static inline int __check_is_bitmap(const unsigned long *bitmap) | |
855 | { | |
856 | return 1; | |
857 | } | |
858 | ||
859 | /* | |
860 | * Special-case data structure for "single bit set only" constant CPU masks. | |
861 | * | |
862 | * We pre-generate all the 64 (or 32) possible bit positions, with enough | |
863 | * padding to the left and the right, and return the constant pointer | |
864 | * appropriately offset. | |
865 | */ | |
866 | extern const unsigned long | |
867 | cpu_bit_bitmap[BITS_PER_LONG+1][BITS_TO_LONGS(NR_CPUS)]; | |
868 | ||
869 | static inline const struct cpumask *get_cpu_mask(unsigned int cpu) | |
870 | { | |
871 | const unsigned long *p = cpu_bit_bitmap[1 + cpu % BITS_PER_LONG]; | |
872 | p -= cpu / BITS_PER_LONG; | |
873 | return to_cpumask(p); | |
874 | } | |
875 | ||
b02a4fd8 PZ |
876 | #if NR_CPUS > 1 |
877 | /** | |
878 | * num_online_cpus() - Read the number of online CPUs | |
879 | * | |
880 | * Despite the fact that __num_online_cpus is of type atomic_t, this | |
881 | * interface gives only a momentary snapshot and is not protected against | |
882 | * concurrent CPU hotplug operations unless invoked from a cpuhp_lock held | |
883 | * region. | |
884 | */ | |
885 | static inline unsigned int num_online_cpus(void) | |
886 | { | |
887 | return atomic_read(&__num_online_cpus); | |
888 | } | |
889 | #define num_possible_cpus() cpumask_weight(cpu_possible_mask) | |
890 | #define num_present_cpus() cpumask_weight(cpu_present_mask) | |
891 | #define num_active_cpus() cpumask_weight(cpu_active_mask) | |
892 | ||
893 | static inline bool cpu_online(unsigned int cpu) | |
894 | { | |
895 | return cpumask_test_cpu(cpu, cpu_online_mask); | |
896 | } | |
897 | ||
898 | static inline bool cpu_possible(unsigned int cpu) | |
899 | { | |
900 | return cpumask_test_cpu(cpu, cpu_possible_mask); | |
901 | } | |
902 | ||
903 | static inline bool cpu_present(unsigned int cpu) | |
904 | { | |
905 | return cpumask_test_cpu(cpu, cpu_present_mask); | |
906 | } | |
907 | ||
908 | static inline bool cpu_active(unsigned int cpu) | |
909 | { | |
910 | return cpumask_test_cpu(cpu, cpu_active_mask); | |
911 | } | |
912 | ||
e40f74c5 PZ |
913 | static inline bool cpu_dying(unsigned int cpu) |
914 | { | |
915 | return cpumask_test_cpu(cpu, cpu_dying_mask); | |
916 | } | |
917 | ||
b02a4fd8 PZ |
918 | #else |
919 | ||
920 | #define num_online_cpus() 1U | |
921 | #define num_possible_cpus() 1U | |
922 | #define num_present_cpus() 1U | |
923 | #define num_active_cpus() 1U | |
924 | ||
925 | static inline bool cpu_online(unsigned int cpu) | |
926 | { | |
927 | return cpu == 0; | |
928 | } | |
929 | ||
930 | static inline bool cpu_possible(unsigned int cpu) | |
931 | { | |
932 | return cpu == 0; | |
933 | } | |
934 | ||
935 | static inline bool cpu_present(unsigned int cpu) | |
936 | { | |
937 | return cpu == 0; | |
938 | } | |
939 | ||
940 | static inline bool cpu_active(unsigned int cpu) | |
941 | { | |
942 | return cpu == 0; | |
943 | } | |
944 | ||
e40f74c5 PZ |
945 | static inline bool cpu_dying(unsigned int cpu) |
946 | { | |
947 | return false; | |
948 | } | |
949 | ||
b02a4fd8 PZ |
950 | #endif /* NR_CPUS > 1 */ |
951 | ||
6ba2ef7b RR |
952 | #define cpu_is_offline(cpu) unlikely(!cpu_online(cpu)) |
953 | ||
954 | #if NR_CPUS <= BITS_PER_LONG | |
955 | #define CPU_BITS_ALL \ | |
956 | { \ | |
9941a383 | 957 | [BITS_TO_LONGS(NR_CPUS)-1] = BITMAP_LAST_WORD_MASK(NR_CPUS) \ |
6ba2ef7b RR |
958 | } |
959 | ||
960 | #else /* NR_CPUS > BITS_PER_LONG */ | |
961 | ||
962 | #define CPU_BITS_ALL \ | |
963 | { \ | |
964 | [0 ... BITS_TO_LONGS(NR_CPUS)-2] = ~0UL, \ | |
9941a383 | 965 | [BITS_TO_LONGS(NR_CPUS)-1] = BITMAP_LAST_WORD_MASK(NR_CPUS) \ |
6ba2ef7b RR |
966 | } |
967 | #endif /* NR_CPUS > BITS_PER_LONG */ | |
968 | ||
5aaba363 SH |
969 | /** |
970 | * cpumap_print_to_pagebuf - copies the cpumask into the buffer either | |
971 | * as comma-separated list of cpus or hex values of cpumask | |
972 | * @list: indicates whether the cpumap must be list | |
973 | * @mask: the cpumask to copy | |
974 | * @buf: the buffer to copy into | |
975 | * | |
976 | * Returns the length of the (null-terminated) @buf string, zero if | |
977 | * nothing is copied. | |
978 | */ | |
979 | static inline ssize_t | |
980 | cpumap_print_to_pagebuf(bool list, char *buf, const struct cpumask *mask) | |
981 | { | |
982 | return bitmap_print_to_pagebuf(list, buf, cpumask_bits(mask), | |
513e3d2d | 983 | nr_cpu_ids); |
5aaba363 SH |
984 | } |
985 | ||
6ba2ef7b | 986 | #if NR_CPUS <= BITS_PER_LONG |
6ba2ef7b RR |
987 | #define CPU_MASK_ALL \ |
988 | (cpumask_t) { { \ | |
9941a383 | 989 | [BITS_TO_LONGS(NR_CPUS)-1] = BITMAP_LAST_WORD_MASK(NR_CPUS) \ |
6ba2ef7b | 990 | } } |
6ba2ef7b | 991 | #else |
6ba2ef7b RR |
992 | #define CPU_MASK_ALL \ |
993 | (cpumask_t) { { \ | |
994 | [0 ... BITS_TO_LONGS(NR_CPUS)-2] = ~0UL, \ | |
9941a383 | 995 | [BITS_TO_LONGS(NR_CPUS)-1] = BITMAP_LAST_WORD_MASK(NR_CPUS) \ |
6ba2ef7b | 996 | } } |
9941a383 | 997 | #endif /* NR_CPUS > BITS_PER_LONG */ |
6ba2ef7b RR |
998 | |
999 | #define CPU_MASK_NONE \ | |
1000 | (cpumask_t) { { \ | |
1001 | [0 ... BITS_TO_LONGS(NR_CPUS)-1] = 0UL \ | |
1002 | } } | |
1003 | ||
1527781d RR |
1004 | #define CPU_MASK_CPU0 \ |
1005 | (cpumask_t) { { \ | |
1006 | [0] = 1UL \ | |
1007 | } } | |
1008 | ||
1da177e4 | 1009 | #endif /* __LINUX_CPUMASK_H */ |