Re: [PATCH 6/6] bitmap: move bitmap_*_region functions to bitmap.h

From: kernel test robot
Date: Thu Jul 27 2023 - 01:09:49 EST

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In reply to: Yury Norov: "[PATCH 6/6] bitmap: move bitmap_*_region functions to bitmap.h"
Next in thread: kernel test robot: "Re: [PATCH 6/6] bitmap: move bitmap_*_region functions to bitmap.h"
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Hi Yury,

kernel test robot noticed the following build errors:

[auto build test ERROR on linus/master]
[also build test ERROR on v6.5-rc3 next-20230726]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url: https://github.com/intel-lab-lkp/linux/commits/Yury-Norov/bitmap-fix-opencoded-bitmap_allocate_region/20230727-100500
base: linus/master
patch link: https://lore.kernel.org/r/20230727020207.36314-7-yury.norov%40gmail.com
patch subject: [PATCH 6/6] bitmap: move bitmap_*_region functions to bitmap.h
config: loongarch-allyesconfig (https://download.01.org/0day-ci/archive/20230727/202307271224.8Qeoqasq-lkp@xxxxxxxxx/config)
compiler: loongarch64-linux-gcc (GCC) 12.3.0
reproduce: (https://download.01.org/0day-ci/archive/20230727/202307271224.8Qeoqasq-lkp@xxxxxxxxx/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202307271224.8Qeoqasq-lkp@xxxxxxxxx/

All error/warnings (new ones prefixed by >>):

scripts/genksyms/parse.y: warning: 9 shift/reduce conflicts [-Wconflicts-sr]
scripts/genksyms/parse.y: warning: 5 reduce/reduce conflicts [-Wconflicts-rr]
scripts/genksyms/parse.y: note: rerun with option '-Wcounterexamples' to generate conflict counterexamples
In file included from include/linux/cpumask.h:12,
from arch/loongarch/include/asm/processor.h:9,
from arch/loongarch/include/asm/thread_info.h:15,
from include/linux/thread_info.h:60,
from include/asm-generic/current.h:5,
from ./arch/loongarch/include/generated/asm/current.h:1,
from include/linux/sched.h:12,
from arch/loongarch/kernel/asm-offsets.c:8:
include/linux/bitmap.h: In function 'bitmap_find_free_region':
>> include/linux/bitmap.h:239:22: error: implicit declaration of function 'bitmap_allocate_region' [-Werror=implicit-function-declaration]
239 | if (!bitmap_allocate_region(bitmap, pos, order))
| ^~~~~~~~~~~~~~~~~~~~~~
include/linux/bitmap.h: In function 'bitmap_release_region':
>> include/linux/bitmap.h:258:9: error: implicit declaration of function 'bitmap_clear'; did you mean 'bitmap_remap'? [-Werror=implicit-function-declaration]
258 | bitmap_clear(bitmap, pos, pos + BIT(order));
| ^~~~~~~~~~~~
| bitmap_remap
include/linux/bitmap.h: At top level:
>> include/linux/bitmap.h:272:19: error: static declaration of 'bitmap_allocate_region' follows non-static declaration
272 | static inline int bitmap_allocate_region(unsigned long *bitmap, unsigned int pos, int order)
| ^~~~~~~~~~~~~~~~~~~~~~
include/linux/bitmap.h:239:22: note: previous implicit declaration of 'bitmap_allocate_region' with type 'int()'
239 | if (!bitmap_allocate_region(bitmap, pos, order))
| ^~~~~~~~~~~~~~~~~~~~~~
include/linux/bitmap.h: In function 'bitmap_allocate_region':
>> include/linux/bitmap.h:278:9: error: implicit declaration of function 'bitmap_set'; did you mean 'bitmap_cut'? [-Werror=implicit-function-declaration]
278 | bitmap_set(bitmap, pos, nbits);
| ^~~~~~~~~~
| bitmap_cut
include/linux/bitmap.h: At top level:
>> include/linux/bitmap.h:510:29: warning: conflicting types for 'bitmap_set'; have 'void(long unsigned int *, unsigned int, unsigned int)'
510 | static __always_inline void bitmap_set(unsigned long *map, unsigned int start,
| ^~~~~~~~~~
>> include/linux/bitmap.h:510:29: error: static declaration of 'bitmap_set' follows non-static declaration
include/linux/bitmap.h:278:9: note: previous implicit declaration of 'bitmap_set' with type 'void(long unsigned int *, unsigned int, unsigned int)'
278 | bitmap_set(bitmap, pos, nbits);
| ^~~~~~~~~~
>> include/linux/bitmap.h:526:29: warning: conflicting types for 'bitmap_clear'; have 'void(long unsigned int *, unsigned int, unsigned int)'
526 | static __always_inline void bitmap_clear(unsigned long *map, unsigned int start,
| ^~~~~~~~~~~~
>> include/linux/bitmap.h:526:29: error: static declaration of 'bitmap_clear' follows non-static declaration
include/linux/bitmap.h:258:9: note: previous implicit declaration of 'bitmap_clear' with type 'void(long unsigned int *, unsigned int, unsigned int)'
258 | bitmap_clear(bitmap, pos, pos + BIT(order));
| ^~~~~~~~~~~~
arch/loongarch/kernel/asm-offsets.c:17:6: warning: no previous prototype for 'output_ptreg_defines' [-Wmissing-prototypes]
17 | void output_ptreg_defines(void)
| ^~~~~~~~~~~~~~~~~~~~
arch/loongarch/kernel/asm-offsets.c:64:6: warning: no previous prototype for 'output_task_defines' [-Wmissing-prototypes]
64 | void output_task_defines(void)
| ^~~~~~~~~~~~~~~~~~~
arch/loongarch/kernel/asm-offsets.c:79:6: warning: no previous prototype for 'output_thread_info_defines' [-Wmissing-prototypes]
79 | void output_thread_info_defines(void)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
arch/loongarch/kernel/asm-offsets.c:95:6: warning: no previous prototype for 'output_thread_defines' [-Wmissing-prototypes]
95 | void output_thread_defines(void)
| ^~~~~~~~~~~~~~~~~~~~~
arch/loongarch/kernel/asm-offsets.c:138:6: warning: no previous prototype for 'output_thread_fpu_defines' [-Wmissing-prototypes]
138 | void output_thread_fpu_defines(void)
| ^~~~~~~~~~~~~~~~~~~~~~~~~
arch/loongarch/kernel/asm-offsets.c:178:6: warning: no previous prototype for 'output_mm_defines' [-Wmissing-prototypes]
178 | void output_mm_defines(void)
| ^~~~~~~~~~~~~~~~~
arch/loongarch/kernel/asm-offsets.c:210:6: warning: no previous prototype for 'output_sc_defines' [-Wmissing-prototypes]
210 | void output_sc_defines(void)
| ^~~~~~~~~~~~~~~~~
arch/loongarch/kernel/asm-offsets.c:218:6: warning: no previous prototype for 'output_signal_defines' [-Wmissing-prototypes]
218 | void output_signal_defines(void)
| ^~~~~~~~~~~~~~~~~~~~~
arch/loongarch/kernel/asm-offsets.c:256:6: warning: no previous prototype for 'output_smpboot_defines' [-Wmissing-prototypes]
256 | void output_smpboot_defines(void)
| ^~~~~~~~~~~~~~~~~~~~~~
arch/loongarch/kernel/asm-offsets.c:266:6: warning: no previous prototype for 'output_pbe_defines' [-Wmissing-prototypes]
266 | void output_pbe_defines(void)
| ^~~~~~~~~~~~~~~~~~
arch/loongarch/kernel/asm-offsets.c:278:6: warning: no previous prototype for 'output_fgraph_ret_regs_defines' [-Wmissing-prototypes]
278 | void output_fgraph_ret_regs_defines(void)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: some warnings being treated as errors
make[3]: *** [scripts/Makefile.build:116: arch/loongarch/kernel/asm-offsets.s] Error 1
make[3]: Target 'prepare' not remade because of errors.
make[2]: *** [Makefile:1287: prepare0] Error 2
make[2]: Target 'prepare' not remade because of errors.
make[1]: *** [Makefile:234: __sub-make] Error 2
make[1]: Target 'prepare' not remade because of errors.
make: *** [Makefile:234: __sub-make] Error 2
make: Target 'prepare' not remade because of errors.

vim +/bitmap_allocate_region +239 include/linux/bitmap.h

202
203 int bitmap_parse(const char *buf, unsigned int buflen,
204 unsigned long *dst, int nbits);
205 int bitmap_parse_user(const char __user *ubuf, unsigned int ulen,
206 unsigned long *dst, int nbits);
207 int bitmap_parselist(const char *buf, unsigned long *maskp,
208 int nmaskbits);
209 int bitmap_parselist_user(const char __user *ubuf, unsigned int ulen,
210 unsigned long *dst, int nbits);
211 void bitmap_remap(unsigned long *dst, const unsigned long *src,
212 const unsigned long *old, const unsigned long *new, unsigned int nbits);
213 int bitmap_bitremap(int oldbit,
214 const unsigned long *old, const unsigned long *new, int bits);
215 void bitmap_onto(unsigned long *dst, const unsigned long *orig,
216 const unsigned long *relmap, unsigned int bits);
217 void bitmap_fold(unsigned long *dst, const unsigned long *orig,
218 unsigned int sz, unsigned int nbits);
219
220 /**
221 * bitmap_find_free_region - find a contiguous aligned mem region
222 * @bitmap: array of unsigned longs corresponding to the bitmap
223 * @bits: number of bits in the bitmap
224 * @order: region size (log base 2 of number of bits) to find
225 *
226 * Find a region of free (zero) bits in a @bitmap of @bits bits and
227 * allocate them (set them to one). Only consider regions of length
228 * a power (@order) of two, aligned to that power of two, which
229 * makes the search algorithm much faster.
230 *
231 * Return the bit offset in bitmap of the allocated region,
232 * or -errno on failure.
233 */
234 static inline int bitmap_find_free_region(unsigned long *bitmap, unsigned int bits, int order)
235 {
236 unsigned int pos, end; /* scans bitmap by regions of size order */
237
238 for (pos = 0 ; (end = pos + (1U << order)) <= bits; pos = end)
> 239 if (!bitmap_allocate_region(bitmap, pos, order))
240 return pos;
241
242 return -ENOMEM;
243 }
244
245 /**
246 * bitmap_release_region - release allocated bitmap region
247 * @bitmap: array of unsigned longs corresponding to the bitmap
248 * @pos: beginning of bit region to release
249 * @order: region size (log base 2 of number of bits) to release
250 *
251 * This is the complement to __bitmap_find_free_region() and releases
252 * the found region (by clearing it in the bitmap).
253 *
254 * No return value.
255 */
256 static inline void bitmap_release_region(unsigned long *bitmap, unsigned int pos, int order)
257 {
> 258 bitmap_clear(bitmap, pos, pos + BIT(order));
259 }
260
261 /**
262 * bitmap_allocate_region - allocate bitmap region
263 * @bitmap: array of unsigned longs corresponding to the bitmap
264 * @pos: beginning of bit region to allocate
265 * @order: region size (log base 2 of number of bits) to allocate
266 *
267 * Allocate (set bits in) a specified region of a bitmap.
268 *
269 * Return 0 on success, or %-EBUSY if specified region wasn't
270 * free (not all bits were zero).
271 */
> 272 static inline int bitmap_allocate_region(unsigned long *bitmap, unsigned int pos, int order)
273 {
274 unsigned int nbits = pos + BIT(order);
275
276 if (find_next_bit(bitmap, pos, nbits) < nbits)
277 return -EBUSY;
> 278 bitmap_set(bitmap, pos, nbits);
279 return 0;
280 }
281

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Next message: patchwork-bot+netdevbpf: "Re: [PATCH v3] net/sched: mqprio: Add length check for TCA_MQPRIO_{MAX/MIN}_RATE64"
Previous message: Jakub Kicinski: "Re: [PATCH net-next v6 0/8] net: ethernet: mtk_eth_soc: add basic support for MT7988 SoC"
In reply to: Yury Norov: "[PATCH 6/6] bitmap: move bitmap_*_region functions to bitmap.h"
Next in thread: kernel test robot: "Re: [PATCH 6/6] bitmap: move bitmap_*_region functions to bitmap.h"
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