* [arnd-playground:warnings-5.10-2 49/55] include/linux/bitmap.h:636:18: warning: array subscript 1 is outside array bounds of 'long unsigned
@ 2020-11-24 20:40 kernel test robot
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From: kernel test robot @ 2020-11-24 20:40 UTC (permalink / raw)
To: kbuild-all
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git warnings-5.10-2
head: 6bf755201c867bd34e151e90a111722f74bd91cf
commit: bc440d869326e303a9e77f5b9369b9b2636caf67 [49/55] Kbuild: enable more warnings by default
config: x86_64-randconfig-s021-20201124 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
reproduce:
# apt-get install sparse
# sparse version: v0.6.3-151-g540c2c4b-dirty
# https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git/commit/?id=bc440d869326e303a9e77f5b9369b9b2636caf67
git remote add arnd-playground https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git
git fetch --no-tags arnd-playground warnings-5.10-2
git checkout bc440d869326e303a9e77f5b9369b9b2636caf67
# save the attached .config to linux build tree
make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=x86_64
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
In file included from include/linux/cpumask.h:12,
from include/linux/smp.h:13,
from include/linux/lockdep.h:14,
from include/linux/mutex.h:17,
from include/linux/notifier.h:14,
from include/linux/clk.h:14,
from drivers/gpio/gpio-xilinx.c:9:
drivers/gpio/gpio-xilinx.c: In function 'xgpio_set_multiple':
>> include/linux/bitmap.h:636:18: warning: array subscript 1 is outside array bounds of 'long unsigned int[1]' [-Warray-bounds]
636 | map[index + 1] &= ~BITMAP_LAST_WORD_MASK(start + nbits);
| ^~
In file included from include/linux/kasan-checks.h:5,
from include/asm-generic/rwonce.h:26,
from ./arch/x86/include/generated/asm/rwonce.h:1,
from include/linux/compiler.h:246,
from include/linux/build_bug.h:5,
from include/linux/bits.h:22,
from include/linux/bitops.h:6,
from drivers/gpio/gpio-xilinx.c:8:
drivers/gpio/gpio-xilinx.c:147:17: note: while referencing 'old'
147 | DECLARE_BITMAP(old, 64);
| ^~~
include/linux/types.h:11:16: note: in definition of macro 'DECLARE_BITMAP'
11 | unsigned long name[BITS_TO_LONGS(bits)]
| ^~~~
In file included from include/linux/cpumask.h:12,
from include/linux/smp.h:13,
from include/linux/lockdep.h:14,
from include/linux/mutex.h:17,
from include/linux/notifier.h:14,
from include/linux/clk.h:14,
from drivers/gpio/gpio-xilinx.c:9:
include/linux/bitmap.h:637:18: warning: array subscript 1 is outside array bounds of 'long unsigned int[1]' [-Warray-bounds]
637 | map[index + 1] |= value >> space;
| ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~
In file included from include/linux/kasan-checks.h:5,
from include/asm-generic/rwonce.h:26,
from ./arch/x86/include/generated/asm/rwonce.h:1,
from include/linux/compiler.h:246,
from include/linux/build_bug.h:5,
from include/linux/bits.h:22,
from include/linux/bitops.h:6,
from drivers/gpio/gpio-xilinx.c:8:
drivers/gpio/gpio-xilinx.c:147:17: note: while referencing 'old'
147 | DECLARE_BITMAP(old, 64);
| ^~~
include/linux/types.h:11:16: note: in definition of macro 'DECLARE_BITMAP'
11 | unsigned long name[BITS_TO_LONGS(bits)]
| ^~~~
In file included from include/linux/cpumask.h:12,
from include/linux/smp.h:13,
from include/linux/lockdep.h:14,
from include/linux/mutex.h:17,
from include/linux/notifier.h:14,
from include/linux/clk.h:14,
from drivers/gpio/gpio-xilinx.c:9:
include/linux/bitmap.h:636:18: warning: array subscript [1, 67108864] is outside array bounds of 'long unsigned int[1]' [-Warray-bounds]
636 | map[index + 1] &= ~BITMAP_LAST_WORD_MASK(start + nbits);
| ^~
In file included from include/linux/kasan-checks.h:5,
from include/asm-generic/rwonce.h:26,
from ./arch/x86/include/generated/asm/rwonce.h:1,
from include/linux/compiler.h:246,
from include/linux/build_bug.h:5,
from include/linux/bits.h:22,
from include/linux/bitops.h:6,
from drivers/gpio/gpio-xilinx.c:8:
drivers/gpio/gpio-xilinx.c:147:17: note: while referencing 'old'
147 | DECLARE_BITMAP(old, 64);
| ^~~
include/linux/types.h:11:16: note: in definition of macro 'DECLARE_BITMAP'
11 | unsigned long name[BITS_TO_LONGS(bits)]
| ^~~~
In file included from include/linux/cpumask.h:12,
from include/linux/smp.h:13,
from include/linux/lockdep.h:14,
from include/linux/mutex.h:17,
from include/linux/notifier.h:14,
from include/linux/clk.h:14,
from drivers/gpio/gpio-xilinx.c:9:
include/linux/bitmap.h:637:18: warning: array subscript [1, 67108864] is outside array bounds of 'long unsigned int[1]' [-Warray-bounds]
637 | map[index + 1] |= value >> space;
| ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~
In file included from include/linux/kasan-checks.h:5,
from include/asm-generic/rwonce.h:26,
from ./arch/x86/include/generated/asm/rwonce.h:1,
from include/linux/compiler.h:246,
from include/linux/build_bug.h:5,
from include/linux/bits.h:22,
from include/linux/bitops.h:6,
from drivers/gpio/gpio-xilinx.c:8:
drivers/gpio/gpio-xilinx.c:147:17: note: while referencing 'old'
147 | DECLARE_BITMAP(old, 64);
| ^~~
include/linux/types.h:11:16: note: in definition of macro 'DECLARE_BITMAP'
11 | unsigned long name[BITS_TO_LONGS(bits)]
| ^~~~
In file included from include/linux/cpumask.h:12,
from include/linux/smp.h:13,
from include/linux/lockdep.h:14,
from include/linux/mutex.h:17,
from include/linux/notifier.h:14,
from include/linux/clk.h:14,
from drivers/gpio/gpio-xilinx.c:9:
include/linux/bitmap.h:591:19: warning: array subscript [1, 67108864] is outside array bounds of 'long unsigned int[1]' [-Warray-bounds]
591 | value_high = map[index + 1] & BITMAP_LAST_WORD_MASK(start + nbits);
| ~~~^~~~~~~~~~~
In file included from include/linux/kasan-checks.h:5,
from include/asm-generic/rwonce.h:26,
vim +636 include/linux/bitmap.h
169c474fb22d8a5 William Breathitt Gray 2019-12-04 611
3acfc95acd57710 Syed Nayyar Waris 2020-11-24 612 /**
3acfc95acd57710 Syed Nayyar Waris 2020-11-24 613 * bitmap_set_value - set n-bit value within a memory region
3acfc95acd57710 Syed Nayyar Waris 2020-11-24 614 * @map: address to the bitmap memory region
3acfc95acd57710 Syed Nayyar Waris 2020-11-24 615 * @value: value of nbits
3acfc95acd57710 Syed Nayyar Waris 2020-11-24 616 * @start: bit offset of the n-bit value
3acfc95acd57710 Syed Nayyar Waris 2020-11-24 617 * @nbits: size of value in bits (must be between 1 and BITS_PER_LONG inclusive).
3acfc95acd57710 Syed Nayyar Waris 2020-11-24 618 */
3acfc95acd57710 Syed Nayyar Waris 2020-11-24 619 static inline void bitmap_set_value(unsigned long *map,
3acfc95acd57710 Syed Nayyar Waris 2020-11-24 620 unsigned long value,
3acfc95acd57710 Syed Nayyar Waris 2020-11-24 621 unsigned long start, unsigned long nbits)
3acfc95acd57710 Syed Nayyar Waris 2020-11-24 622 {
3acfc95acd57710 Syed Nayyar Waris 2020-11-24 623 const size_t index = BIT_WORD(start);
3acfc95acd57710 Syed Nayyar Waris 2020-11-24 624 const unsigned long offset = start % BITS_PER_LONG;
3acfc95acd57710 Syed Nayyar Waris 2020-11-24 625 const unsigned long ceiling = round_up(start + 1, BITS_PER_LONG);
3acfc95acd57710 Syed Nayyar Waris 2020-11-24 626 const unsigned long space = ceiling - start;
3acfc95acd57710 Syed Nayyar Waris 2020-11-24 627
3acfc95acd57710 Syed Nayyar Waris 2020-11-24 628 value &= GENMASK(nbits - 1, 0);
3acfc95acd57710 Syed Nayyar Waris 2020-11-24 629
3acfc95acd57710 Syed Nayyar Waris 2020-11-24 630 if (space >= nbits) {
3acfc95acd57710 Syed Nayyar Waris 2020-11-24 631 map[index] &= ~(GENMASK(nbits - 1, 0) << offset);
3acfc95acd57710 Syed Nayyar Waris 2020-11-24 632 map[index] |= value << offset;
3acfc95acd57710 Syed Nayyar Waris 2020-11-24 633 } else {
3acfc95acd57710 Syed Nayyar Waris 2020-11-24 634 map[index + 0] &= ~BITMAP_FIRST_WORD_MASK(start);
3acfc95acd57710 Syed Nayyar Waris 2020-11-24 635 map[index + 0] |= value << offset;
3acfc95acd57710 Syed Nayyar Waris 2020-11-24 @636 map[index + 1] &= ~BITMAP_LAST_WORD_MASK(start + nbits);
3acfc95acd57710 Syed Nayyar Waris 2020-11-24 637 map[index + 1] |= value >> space;
3acfc95acd57710 Syed Nayyar Waris 2020-11-24 638 }
3acfc95acd57710 Syed Nayyar Waris 2020-11-24 639 }
3acfc95acd57710 Syed Nayyar Waris 2020-11-24 640
:::::: The code at line 636 was first introduced by commit
:::::: 3acfc95acd57710ccc4f65d150295af1475bdc3e bitops: introduce the for_each_set_clump macro
:::::: TO: Syed Nayyar Waris <syednwaris@gmail.com>
:::::: CC: Stephen Rothwell <sfr@canb.auug.org.au>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org
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2020-11-24 20:40 [arnd-playground:warnings-5.10-2 49/55] include/linux/bitmap.h:636:18: warning: array subscript 1 is outside array bounds of 'long unsigned kernel test robot
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