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authorRusty Russell <rusty@rustcorp.com.au>2009-09-24 11:34:53 -0400
committerRusty Russell <rusty@rustcorp.com.au>2009-09-23 20:04:53 -0400
commit6ba2ef7baac23a5d9bb85e28b882d16b439a2293 (patch)
tree609150ce473b6466d53d42bd7bf9353b7a65ab66 /include
parent4b805b17382c11a8b1c9bb8053ce9d1dcde0701a (diff)
cpumask: Move deprecated functions to end of header.
The new ones have pretty kerneldoc. Move the old ones to the end to avoid confusing people. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: benh@kernel.crashing.org
Diffstat (limited to 'include')
-rw-r--r--include/linux/cpumask.h593
1 files changed, 252 insertions, 341 deletions
diff --git a/include/linux/cpumask.h b/include/linux/cpumask.h
index e162d13c65ab..789cf5f920ce 100644
--- a/include/linux/cpumask.h
+++ b/include/linux/cpumask.h
@@ -3,328 +3,37 @@
3 3
4/* 4/*
5 * Cpumasks provide a bitmap suitable for representing the 5 * Cpumasks provide a bitmap suitable for representing the
6 * set of CPU's in a system, one bit position per CPU number. 6 * set of CPU's in a system, one bit position per CPU number. In general,
7 * 7 * only nr_cpu_ids (<= NR_CPUS) bits are valid.
8 * The new cpumask_ ops take a "struct cpumask *"; the old ones
9 * use cpumask_t.
10 *
11 * See detailed comments in the file linux/bitmap.h describing the
12 * data type on which these cpumasks are based.
13 *
14 * For details of cpumask_scnprintf() and cpumask_parse_user(),
15 * see bitmap_scnprintf() and bitmap_parse_user() in lib/bitmap.c.
16 * For details of cpulist_scnprintf() and cpulist_parse(), see
17 * bitmap_scnlistprintf() and bitmap_parselist(), also in bitmap.c.
18 *
19 * . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
20 * Note: The alternate operations with the suffix "_nr" are used
21 * to limit the range of the loop to nr_cpu_ids instead of
22 * NR_CPUS when NR_CPUS > 64 for performance reasons.
23 * If NR_CPUS is <= 64 then most assembler bitmask
24 * operators execute faster with a constant range, so
25 * the operator will continue to use NR_CPUS.
26 *
27 * Another consideration is that nr_cpu_ids is initialized
28 * to NR_CPUS and isn't lowered until the possible cpus are
29 * discovered (including any disabled cpus). So early uses
30 * will span the entire range of NR_CPUS.
31 * . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
32 *
33 * The obsolescent cpumask operations are:
34 *
35 * void cpu_set(cpu, mask) turn on bit 'cpu' in mask
36 * void cpu_clear(cpu, mask) turn off bit 'cpu' in mask
37 * void cpus_setall(mask) set all bits
38 * void cpus_clear(mask) clear all bits
39 * int cpu_isset(cpu, mask) true iff bit 'cpu' set in mask
40 * int cpu_test_and_set(cpu, mask) test and set bit 'cpu' in mask
41 *
42 * int cpus_and(dst, src1, src2) dst = src1 & src2 [intersection]
43 * void cpus_or(dst, src1, src2) dst = src1 | src2 [union]
44 * void cpus_xor(dst, src1, src2) dst = src1 ^ src2
45 * int cpus_andnot(dst, src1, src2) dst = src1 & ~src2
46 *
47 * int cpus_equal(mask1, mask2) Does mask1 == mask2?
48 * int cpus_intersects(mask1, mask2) Do mask1 and mask2 intersect?
49 * int cpus_subset(mask1, mask2) Is mask1 a subset of mask2?
50 * int cpus_empty(mask) Is mask empty (no bits sets)?
51 * int cpus_weight(mask) Hamming weigh - number of set bits
52 *
53 * void cpus_shift_left(dst, src, n) Shift left
54 *
55 * int first_cpu(mask) Number lowest set bit, or NR_CPUS
56 * int next_cpu(cpu, mask) Next cpu past 'cpu', or NR_CPUS
57 *
58 * cpumask_t cpumask_of_cpu(cpu) Return cpumask with bit 'cpu' set
59 * (can be used as an lvalue)
60 * CPU_MASK_ALL Initializer - all bits set
61 * CPU_MASK_NONE Initializer - no bits set
62 * unsigned long *cpus_addr(mask) Array of unsigned long's in mask
63 *
64 * int cpumask_scnprintf(buf, len, mask) Format cpumask for printing
65 * int cpumask_parse_user(ubuf, ulen, mask) Parse ascii string as cpumask
66 * int cpulist_scnprintf(buf, len, mask) Format cpumask as list for printing
67 * int cpulist_parse(buf, map) Parse ascii string as cpulist
68 *
69 * for_each_cpu_mask(cpu, mask) for-loop cpu over mask using NR_CPUS
70 * for_each_cpu_mask_nr(cpu, mask) for-loop cpu over mask using nr_cpu_ids
71 *
72 * int num_online_cpus() Number of online CPUs
73 * int num_possible_cpus() Number of all possible CPUs
74 * int num_present_cpus() Number of present CPUs
75 *
76 * int cpu_online(cpu) Is some cpu online?
77 * int cpu_possible(cpu) Is some cpu possible?
78 * int cpu_present(cpu) Is some cpu present (can schedule)?
79 *
80 * int any_online_cpu(mask) First online cpu in mask
81 *
82 * for_each_possible_cpu(cpu) for-loop cpu over cpu_possible_map
83 * for_each_online_cpu(cpu) for-loop cpu over cpu_online_map
84 * for_each_present_cpu(cpu) for-loop cpu over cpu_present_map
85 *
86 * Subtlety:
87 * 1) The 'type-checked' form of cpu_isset() causes gcc (3.3.2, anyway)
88 * to generate slightly worse code. Note for example the additional
89 * 40 lines of assembly code compiling the "for each possible cpu"
90 * loops buried in the disk_stat_read() macros calls when compiling
91 * drivers/block/genhd.c (arch i386, CONFIG_SMP=y). So use a simple
92 * one-line #define for cpu_isset(), instead of wrapping an inline
93 * inside a macro, the way we do the other calls.
94 */ 8 */
95
96#include <linux/kernel.h> 9#include <linux/kernel.h>
97#include <linux/threads.h> 10#include <linux/threads.h>
98#include <linux/bitmap.h> 11#include <linux/bitmap.h>
99 12
100typedef struct cpumask { DECLARE_BITMAP(bits, NR_CPUS); } cpumask_t; 13typedef struct cpumask { DECLARE_BITMAP(bits, NR_CPUS); } cpumask_t;
101 14
102#ifndef CONFIG_DISABLE_OBSOLETE_CPUMASK_FUNCTIONS
103#define cpu_set(cpu, dst) __cpu_set((cpu), &(dst))
104static inline void __cpu_set(int cpu, volatile cpumask_t *dstp)
105{
106 set_bit(cpu, dstp->bits);
107}
108
109#define cpu_clear(cpu, dst) __cpu_clear((cpu), &(dst))
110static inline void __cpu_clear(int cpu, volatile cpumask_t *dstp)
111{
112 clear_bit(cpu, dstp->bits);
113}
114
115#define cpus_setall(dst) __cpus_setall(&(dst), NR_CPUS)
116static inline void __cpus_setall(cpumask_t *dstp, int nbits)
117{
118 bitmap_fill(dstp->bits, nbits);
119}
120
121#define cpus_clear(dst) __cpus_clear(&(dst), NR_CPUS)
122static inline void __cpus_clear(cpumask_t *dstp, int nbits)
123{
124 bitmap_zero(dstp->bits, nbits);
125}
126
127/* No static inline type checking - see Subtlety (1) above. */
128#define cpu_isset(cpu, cpumask) test_bit((cpu), (cpumask).bits)
129
130#define cpu_test_and_set(cpu, cpumask) __cpu_test_and_set((cpu), &(cpumask))
131static inline int __cpu_test_and_set(int cpu, cpumask_t *addr)
132{
133 return test_and_set_bit(cpu, addr->bits);
134}
135
136#define cpus_and(dst, src1, src2) __cpus_and(&(dst), &(src1), &(src2), NR_CPUS)
137static inline int __cpus_and(cpumask_t *dstp, const cpumask_t *src1p,
138 const cpumask_t *src2p, int nbits)
139{
140 return bitmap_and(dstp->bits, src1p->bits, src2p->bits, nbits);
141}
142
143#define cpus_or(dst, src1, src2) __cpus_or(&(dst), &(src1), &(src2), NR_CPUS)
144static inline void __cpus_or(cpumask_t *dstp, const cpumask_t *src1p,
145 const cpumask_t *src2p, int nbits)
146{
147 bitmap_or(dstp->bits, src1p->bits, src2p->bits, nbits);
148}
149
150#define cpus_xor(dst, src1, src2) __cpus_xor(&(dst), &(src1), &(src2), NR_CPUS)
151static inline void __cpus_xor(cpumask_t *dstp, const cpumask_t *src1p,
152 const cpumask_t *src2p, int nbits)
153{
154 bitmap_xor(dstp->bits, src1p->bits, src2p->bits, nbits);
155}
156
157#define cpus_andnot(dst, src1, src2) \
158 __cpus_andnot(&(dst), &(src1), &(src2), NR_CPUS)
159static inline int __cpus_andnot(cpumask_t *dstp, const cpumask_t *src1p,
160 const cpumask_t *src2p, int nbits)
161{
162 return bitmap_andnot(dstp->bits, src1p->bits, src2p->bits, nbits);
163}
164
165#define cpus_equal(src1, src2) __cpus_equal(&(src1), &(src2), NR_CPUS)
166static inline int __cpus_equal(const cpumask_t *src1p,
167 const cpumask_t *src2p, int nbits)
168{
169 return bitmap_equal(src1p->bits, src2p->bits, nbits);
170}
171
172#define cpus_intersects(src1, src2) __cpus_intersects(&(src1), &(src2), NR_CPUS)
173static inline int __cpus_intersects(const cpumask_t *src1p,
174 const cpumask_t *src2p, int nbits)
175{
176 return bitmap_intersects(src1p->bits, src2p->bits, nbits);
177}
178
179#define cpus_subset(src1, src2) __cpus_subset(&(src1), &(src2), NR_CPUS)
180static inline int __cpus_subset(const cpumask_t *src1p,
181 const cpumask_t *src2p, int nbits)
182{
183 return bitmap_subset(src1p->bits, src2p->bits, nbits);
184}
185
186#define cpus_empty(src) __cpus_empty(&(src), NR_CPUS)
187static inline int __cpus_empty(const cpumask_t *srcp, int nbits)
188{
189 return bitmap_empty(srcp->bits, nbits);
190}
191
192#define cpus_weight(cpumask) __cpus_weight(&(cpumask), NR_CPUS)
193static inline int __cpus_weight(const cpumask_t *srcp, int nbits)
194{
195 return bitmap_weight(srcp->bits, nbits);
196}
197
198#define cpus_shift_left(dst, src, n) \
199 __cpus_shift_left(&(dst), &(src), (n), NR_CPUS)
200static inline void __cpus_shift_left(cpumask_t *dstp,
201 const cpumask_t *srcp, int n, int nbits)
202{
203 bitmap_shift_left(dstp->bits, srcp->bits, n, nbits);
204}
205#endif /* !CONFIG_DISABLE_OBSOLETE_CPUMASK_FUNCTIONS */
206
207/** 15/**
208 * to_cpumask - convert an NR_CPUS bitmap to a struct cpumask * 16 * cpumask_bits - get the bits in a cpumask
209 * @bitmap: the bitmap 17 * @maskp: the struct cpumask *
210 * 18 *
211 * There are a few places where cpumask_var_t isn't appropriate and 19 * You should only assume nr_cpu_ids bits of this mask are valid. This is
212 * static cpumasks must be used (eg. very early boot), yet we don't 20 * a macro so it's const-correct.
213 * expose the definition of 'struct cpumask'.
214 *
215 * This does the conversion, and can be used as a constant initializer.
216 */ 21 */
217#define to_cpumask(bitmap) \ 22#define cpumask_bits(maskp) ((maskp)->bits)
218 ((struct cpumask *)(1 ? (bitmap) \
219 : (void *)sizeof(__check_is_bitmap(bitmap))))
220
221static inline int __check_is_bitmap(const unsigned long *bitmap)
222{
223 return 1;
224}
225
226/*
227 * Special-case data structure for "single bit set only" constant CPU masks.
228 *
229 * We pre-generate all the 64 (or 32) possible bit positions, with enough
230 * padding to the left and the right, and return the constant pointer
231 * appropriately offset.
232 */
233extern const unsigned long
234 cpu_bit_bitmap[BITS_PER_LONG+1][BITS_TO_LONGS(NR_CPUS)];
235
236static inline const struct cpumask *get_cpu_mask(unsigned int cpu)
237{
238 const unsigned long *p = cpu_bit_bitmap[1 + cpu % BITS_PER_LONG];
239 p -= cpu / BITS_PER_LONG;
240 return to_cpumask(p);
241}
242
243#ifndef CONFIG_DISABLE_OBSOLETE_CPUMASK_FUNCTIONS
244/*
245 * In cases where we take the address of the cpumask immediately,
246 * gcc optimizes it out (it's a constant) and there's no huge stack
247 * variable created:
248 */
249#define cpumask_of_cpu(cpu) (*get_cpu_mask(cpu))
250
251
252#define CPU_MASK_LAST_WORD BITMAP_LAST_WORD_MASK(NR_CPUS)
253
254#if NR_CPUS <= BITS_PER_LONG
255
256#define CPU_MASK_ALL \
257(cpumask_t) { { \
258 [BITS_TO_LONGS(NR_CPUS)-1] = CPU_MASK_LAST_WORD \
259} }
260
261#else
262
263#define CPU_MASK_ALL \
264(cpumask_t) { { \
265 [0 ... BITS_TO_LONGS(NR_CPUS)-2] = ~0UL, \
266 [BITS_TO_LONGS(NR_CPUS)-1] = CPU_MASK_LAST_WORD \
267} }
268
269#endif
270
271#define CPU_MASK_NONE \
272(cpumask_t) { { \
273 [0 ... BITS_TO_LONGS(NR_CPUS)-1] = 0UL \
274} }
275
276#define CPU_MASK_CPU0 \
277(cpumask_t) { { \
278 [0] = 1UL \
279} }
280
281#define cpus_addr(src) ((src).bits)
282
283#endif /* !CONFIG_DISABLE_OBSOLETE_CPUMASK_FUNCTIONS */
284 23
285#if NR_CPUS == 1 24#if NR_CPUS == 1
286
287#define nr_cpu_ids 1 25#define nr_cpu_ids 1
288#ifndef CONFIG_DISABLE_OBSOLETE_CPUMASK_FUNCTIONS 26#else
289#define first_cpu(src) ({ (void)(src); 0; })
290#define next_cpu(n, src) ({ (void)(src); 1; })
291#define any_online_cpu(mask) 0
292#define for_each_cpu_mask(cpu, mask) \
293 for ((cpu) = 0; (cpu) < 1; (cpu)++, (void)mask)
294#endif /* !CONFIG_DISABLE_OBSOLETE_CPUMASK_FUNCTIONS */
295#else /* NR_CPUS > 1 */
296
297extern int nr_cpu_ids; 27extern int nr_cpu_ids;
298#ifndef CONFIG_DISABLE_OBSOLETE_CPUMASK_FUNCTIONS
299int __first_cpu(const cpumask_t *srcp);
300int __next_cpu(int n, const cpumask_t *srcp);
301int __any_online_cpu(const cpumask_t *mask);
302
303#define first_cpu(src) __first_cpu(&(src))
304#define next_cpu(n, src) __next_cpu((n), &(src))
305#define any_online_cpu(mask) __any_online_cpu(&(mask))
306#define for_each_cpu_mask(cpu, mask) \
307 for ((cpu) = -1; \
308 (cpu) = next_cpu((cpu), (mask)), \
309 (cpu) < NR_CPUS; )
310#endif /* !CONFIG_DISABLE_OBSOLETE_CPUMASK_FUNCTIONS */
311#endif 28#endif
312 29
313#ifndef CONFIG_DISABLE_OBSOLETE_CPUMASK_FUNCTIONS 30#ifdef CONFIG_CPUMASK_OFFSTACK
314#if NR_CPUS <= 64 31/* Assuming NR_CPUS is huge, a runtime limit is more efficient. Also,
315 32 * not all bits may be allocated. */
316#define for_each_cpu_mask_nr(cpu, mask) for_each_cpu_mask(cpu, mask) 33#define nr_cpumask_bits nr_cpu_ids
317 34#else
318#else /* NR_CPUS > 64 */ 35#define nr_cpumask_bits NR_CPUS
319 36#endif
320int __next_cpu_nr(int n, const cpumask_t *srcp);
321#define for_each_cpu_mask_nr(cpu, mask) \
322 for ((cpu) = -1; \
323 (cpu) = __next_cpu_nr((cpu), &(mask)), \
324 (cpu) < nr_cpu_ids; )
325
326#endif /* NR_CPUS > 64 */
327#endif /* !CONFIG_DISABLE_OBSOLETE_CPUMASK_FUNCTIONS */
328 37
329/* 38/*
330 * The following particular system cpumasks and operations manage 39 * The following particular system cpumasks and operations manage
@@ -371,12 +80,6 @@ extern const struct cpumask *const cpu_online_mask;
371extern const struct cpumask *const cpu_present_mask; 80extern const struct cpumask *const cpu_present_mask;
372extern const struct cpumask *const cpu_active_mask; 81extern const struct cpumask *const cpu_active_mask;
373 82
374/* These strip const, as traditionally they weren't const. */
375#define cpu_possible_map (*(cpumask_t *)cpu_possible_mask)
376#define cpu_online_map (*(cpumask_t *)cpu_online_mask)
377#define cpu_present_map (*(cpumask_t *)cpu_present_mask)
378#define cpu_active_map (*(cpumask_t *)cpu_active_mask)
379
380#if NR_CPUS > 1 83#if NR_CPUS > 1
381#define num_online_cpus() cpumask_weight(cpu_online_mask) 84#define num_online_cpus() cpumask_weight(cpu_online_mask)
382#define num_possible_cpus() cpumask_weight(cpu_possible_mask) 85#define num_possible_cpus() cpumask_weight(cpu_possible_mask)
@@ -395,35 +98,6 @@ extern const struct cpumask *const cpu_active_mask;
395#define cpu_active(cpu) ((cpu) == 0) 98#define cpu_active(cpu) ((cpu) == 0)
396#endif 99#endif
397 100
398#define cpu_is_offline(cpu) unlikely(!cpu_online(cpu))
399
400/* These are the new versions of the cpumask operators: passed by pointer.
401 * The older versions will be implemented in terms of these, then deleted. */
402#define cpumask_bits(maskp) ((maskp)->bits)
403
404#if NR_CPUS <= BITS_PER_LONG
405#define CPU_BITS_ALL \
406{ \
407 [BITS_TO_LONGS(NR_CPUS)-1] = CPU_MASK_LAST_WORD \
408}
409
410#else /* NR_CPUS > BITS_PER_LONG */
411
412#define CPU_BITS_ALL \
413{ \
414 [0 ... BITS_TO_LONGS(NR_CPUS)-2] = ~0UL, \
415 [BITS_TO_LONGS(NR_CPUS)-1] = CPU_MASK_LAST_WORD \
416}
417#endif /* NR_CPUS > BITS_PER_LONG */
418
419#ifdef CONFIG_CPUMASK_OFFSTACK
420/* Assuming NR_CPUS is huge, a runtime limit is more efficient. Also,
421 * not all bits may be allocated. */
422#define nr_cpumask_bits nr_cpu_ids
423#else
424#define nr_cpumask_bits NR_CPUS
425#endif
426
427/* verify cpu argument to cpumask_* operators */ 101/* verify cpu argument to cpumask_* operators */
428static inline unsigned int cpumask_check(unsigned int cpu) 102static inline unsigned int cpumask_check(unsigned int cpu)
429{ 103{
@@ -984,4 +658,241 @@ void set_cpu_active(unsigned int cpu, bool active);
984void init_cpu_present(const struct cpumask *src); 658void init_cpu_present(const struct cpumask *src);
985void init_cpu_possible(const struct cpumask *src); 659void init_cpu_possible(const struct cpumask *src);
986void init_cpu_online(const struct cpumask *src); 660void init_cpu_online(const struct cpumask *src);
661
662/**
663 * to_cpumask - convert an NR_CPUS bitmap to a struct cpumask *
664 * @bitmap: the bitmap
665 *
666 * There are a few places where cpumask_var_t isn't appropriate and
667 * static cpumasks must be used (eg. very early boot), yet we don't
668 * expose the definition of 'struct cpumask'.
669 *
670 * This does the conversion, and can be used as a constant initializer.
671 */
672#define to_cpumask(bitmap) \
673 ((struct cpumask *)(1 ? (bitmap) \
674 : (void *)sizeof(__check_is_bitmap(bitmap))))
675
676static inline int __check_is_bitmap(const unsigned long *bitmap)
677{
678 return 1;
679}
680
681/*
682 * Special-case data structure for "single bit set only" constant CPU masks.
683 *
684 * We pre-generate all the 64 (or 32) possible bit positions, with enough
685 * padding to the left and the right, and return the constant pointer
686 * appropriately offset.
687 */
688extern const unsigned long
689 cpu_bit_bitmap[BITS_PER_LONG+1][BITS_TO_LONGS(NR_CPUS)];
690
691static inline const struct cpumask *get_cpu_mask(unsigned int cpu)
692{
693 const unsigned long *p = cpu_bit_bitmap[1 + cpu % BITS_PER_LONG];
694 p -= cpu / BITS_PER_LONG;
695 return to_cpumask(p);
696}
697
698#define cpu_is_offline(cpu) unlikely(!cpu_online(cpu))
699
700#if NR_CPUS <= BITS_PER_LONG
701#define CPU_BITS_ALL \
702{ \
703 [BITS_TO_LONGS(NR_CPUS)-1] = CPU_MASK_LAST_WORD \
704}
705
706#else /* NR_CPUS > BITS_PER_LONG */
707
708#define CPU_BITS_ALL \
709{ \
710 [0 ... BITS_TO_LONGS(NR_CPUS)-2] = ~0UL, \
711 [BITS_TO_LONGS(NR_CPUS)-1] = CPU_MASK_LAST_WORD \
712}
713#endif /* NR_CPUS > BITS_PER_LONG */
714
715/*
716 *
717 * From here down, all obsolete. Use cpumask_ variants!
718 *
719 */
720#ifndef CONFIG_DISABLE_OBSOLETE_CPUMASK_FUNCTIONS
721/* These strip const, as traditionally they weren't const. */
722#define cpu_possible_map (*(cpumask_t *)cpu_possible_mask)
723#define cpu_online_map (*(cpumask_t *)cpu_online_mask)
724#define cpu_present_map (*(cpumask_t *)cpu_present_mask)
725#define cpu_active_map (*(cpumask_t *)cpu_active_mask)
726
727#define cpumask_of_cpu(cpu) (*get_cpu_mask(cpu))
728
729#define CPU_MASK_LAST_WORD BITMAP_LAST_WORD_MASK(NR_CPUS)
730
731#if NR_CPUS <= BITS_PER_LONG
732
733#define CPU_MASK_ALL \
734(cpumask_t) { { \
735 [BITS_TO_LONGS(NR_CPUS)-1] = CPU_MASK_LAST_WORD \
736} }
737
738#else
739
740#define CPU_MASK_ALL \
741(cpumask_t) { { \
742 [0 ... BITS_TO_LONGS(NR_CPUS)-2] = ~0UL, \
743 [BITS_TO_LONGS(NR_CPUS)-1] = CPU_MASK_LAST_WORD \
744} }
745
746#endif
747
748#define CPU_MASK_NONE \
749(cpumask_t) { { \
750 [0 ... BITS_TO_LONGS(NR_CPUS)-1] = 0UL \
751} }
752
753#define CPU_MASK_CPU0 \
754(cpumask_t) { { \
755 [0] = 1UL \
756} }
757
758#if NR_CPUS == 1
759#define first_cpu(src) ({ (void)(src); 0; })
760#define next_cpu(n, src) ({ (void)(src); 1; })
761#define any_online_cpu(mask) 0
762#define for_each_cpu_mask(cpu, mask) \
763 for ((cpu) = 0; (cpu) < 1; (cpu)++, (void)mask)
764#else /* NR_CPUS > 1 */
765int __first_cpu(const cpumask_t *srcp);
766int __next_cpu(int n, const cpumask_t *srcp);
767int __any_online_cpu(const cpumask_t *mask);
768
769#define first_cpu(src) __first_cpu(&(src))
770#define next_cpu(n, src) __next_cpu((n), &(src))
771#define any_online_cpu(mask) __any_online_cpu(&(mask))
772#define for_each_cpu_mask(cpu, mask) \
773 for ((cpu) = -1; \
774 (cpu) = next_cpu((cpu), (mask)), \
775 (cpu) < NR_CPUS; )
776#endif /* SMP */
777
778#if NR_CPUS <= 64
779
780#define for_each_cpu_mask_nr(cpu, mask) for_each_cpu_mask(cpu, mask)
781
782#else /* NR_CPUS > 64 */
783
784int __next_cpu_nr(int n, const cpumask_t *srcp);
785#define for_each_cpu_mask_nr(cpu, mask) \
786 for ((cpu) = -1; \
787 (cpu) = __next_cpu_nr((cpu), &(mask)), \
788 (cpu) < nr_cpu_ids; )
789
790#endif /* NR_CPUS > 64 */
791
792#define cpus_addr(src) ((src).bits)
793
794#define cpu_set(cpu, dst) __cpu_set((cpu), &(dst))
795static inline void __cpu_set(int cpu, volatile cpumask_t *dstp)
796{
797 set_bit(cpu, dstp->bits);
798}
799
800#define cpu_clear(cpu, dst) __cpu_clear((cpu), &(dst))
801static inline void __cpu_clear(int cpu, volatile cpumask_t *dstp)
802{
803 clear_bit(cpu, dstp->bits);
804}
805
806#define cpus_setall(dst) __cpus_setall(&(dst), NR_CPUS)
807static inline void __cpus_setall(cpumask_t *dstp, int nbits)
808{
809 bitmap_fill(dstp->bits, nbits);
810}
811
812#define cpus_clear(dst) __cpus_clear(&(dst), NR_CPUS)
813static inline void __cpus_clear(cpumask_t *dstp, int nbits)
814{
815 bitmap_zero(dstp->bits, nbits);
816}
817
818/* No static inline type checking - see Subtlety (1) above. */
819#define cpu_isset(cpu, cpumask) test_bit((cpu), (cpumask).bits)
820
821#define cpu_test_and_set(cpu, cpumask) __cpu_test_and_set((cpu), &(cpumask))
822static inline int __cpu_test_and_set(int cpu, cpumask_t *addr)
823{
824 return test_and_set_bit(cpu, addr->bits);
825}
826
827#define cpus_and(dst, src1, src2) __cpus_and(&(dst), &(src1), &(src2), NR_CPUS)
828static inline int __cpus_and(cpumask_t *dstp, const cpumask_t *src1p,
829 const cpumask_t *src2p, int nbits)
830{
831 return bitmap_and(dstp->bits, src1p->bits, src2p->bits, nbits);
832}
833
834#define cpus_or(dst, src1, src2) __cpus_or(&(dst), &(src1), &(src2), NR_CPUS)
835static inline void __cpus_or(cpumask_t *dstp, const cpumask_t *src1p,
836 const cpumask_t *src2p, int nbits)
837{
838 bitmap_or(dstp->bits, src1p->bits, src2p->bits, nbits);
839}
840
841#define cpus_xor(dst, src1, src2) __cpus_xor(&(dst), &(src1), &(src2), NR_CPUS)
842static inline void __cpus_xor(cpumask_t *dstp, const cpumask_t *src1p,
843 const cpumask_t *src2p, int nbits)
844{
845 bitmap_xor(dstp->bits, src1p->bits, src2p->bits, nbits);
846}
847
848#define cpus_andnot(dst, src1, src2) \
849 __cpus_andnot(&(dst), &(src1), &(src2), NR_CPUS)
850static inline int __cpus_andnot(cpumask_t *dstp, const cpumask_t *src1p,
851 const cpumask_t *src2p, int nbits)
852{
853 return bitmap_andnot(dstp->bits, src1p->bits, src2p->bits, nbits);
854}
855
856#define cpus_equal(src1, src2) __cpus_equal(&(src1), &(src2), NR_CPUS)
857static inline int __cpus_equal(const cpumask_t *src1p,
858 const cpumask_t *src2p, int nbits)
859{
860 return bitmap_equal(src1p->bits, src2p->bits, nbits);
861}
862
863#define cpus_intersects(src1, src2) __cpus_intersects(&(src1), &(src2), NR_CPUS)
864static inline int __cpus_intersects(const cpumask_t *src1p,
865 const cpumask_t *src2p, int nbits)
866{
867 return bitmap_intersects(src1p->bits, src2p->bits, nbits);
868}
869
870#define cpus_subset(src1, src2) __cpus_subset(&(src1), &(src2), NR_CPUS)
871static inline int __cpus_subset(const cpumask_t *src1p,
872 const cpumask_t *src2p, int nbits)
873{
874 return bitmap_subset(src1p->bits, src2p->bits, nbits);
875}
876
877#define cpus_empty(src) __cpus_empty(&(src), NR_CPUS)
878static inline int __cpus_empty(const cpumask_t *srcp, int nbits)
879{
880 return bitmap_empty(srcp->bits, nbits);
881}
882
883#define cpus_weight(cpumask) __cpus_weight(&(cpumask), NR_CPUS)
884static inline int __cpus_weight(const cpumask_t *srcp, int nbits)
885{
886 return bitmap_weight(srcp->bits, nbits);
887}
888
889#define cpus_shift_left(dst, src, n) \
890 __cpus_shift_left(&(dst), &(src), (n), NR_CPUS)
891static inline void __cpus_shift_left(cpumask_t *dstp,
892 const cpumask_t *srcp, int n, int nbits)
893{
894 bitmap_shift_left(dstp->bits, srcp->bits, n, nbits);
895}
896#endif /* !CONFIG_DISABLE_OBSOLETE_CPUMASK_FUNCTIONS */
897
987#endif /* __LINUX_CPUMASK_H */ 898#endif /* __LINUX_CPUMASK_H */
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-29 02:36:55 -0500