4:28 p.m.
tree: https://github.com/norov/linux find_bit_smallconst_v4
head: 747508d50b9b17dcf850b2a9c07156bf52e147df
commit: 1c7083bf4aab3b8d9dedc5155a5a82741cc161bc [11/13] lib: add fast path for
find_first_*_bit() and find_last_bit()
config: sh-randconfig-m031-20210312 (attached as .config)
compiler: sh4-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O
~/bin/make.cross
chmod +x ~/bin/make.cross
# https://github.com/norov/linux/commit/1c7083bf4aab3b8d9dedc5155a5a82741cc...
git remote add norov https://github.com/norov/linux
git fetch --no-tags norov find_bit_smallconst_v4
git checkout 1c7083bf4aab3b8d9dedc5155a5a82741cc161bc
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=sh
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp(a)intel.com>
All errors (new ones prefixed by >>):
In file included from include/asm-generic/bitops/le.h:5,
from arch/sh/include/asm/bitops.h:65,
from include/linux/bitops.h:32,
from include/linux/kernel.h:11,
from include/asm-generic/bug.h:20,
from arch/sh/include/asm/bug.h:112,
from include/linux/bug.h:5,
from include/linux/page-flags.h:10,
from kernel/bounds.c:10:
include/asm-generic/bitops/find.h: In function 'find_last_bit':
> include/asm-generic/bitops/find.h:164:16: error: implicit
declaration of function '__fls'; did you mean '__ffs'?
[-Werror=implicit-function-declaration]
164 | return val ? __fls(val) :
size;
| ^~~~~
| __ffs
In file included from arch/sh/include/asm/bitops.h:68,
from include/linux/bitops.h:32,
from include/linux/kernel.h:11,
from include/asm-generic/bug.h:20,
from arch/sh/include/asm/bug.h:112,
from include/linux/bug.h:5,
from include/linux/page-flags.h:10,
from kernel/bounds.c:10:
include/asm-generic/bitops/__fls.h: At top level:
> include/asm-generic/bitops/__fls.h:13:38: error: conflicting
types for '__fls'
13 | static __always_inline unsigned long
__fls(unsigned long word)
| ^~~~~
In file included from include/asm-generic/bitops/le.h:5,
from arch/sh/include/asm/bitops.h:65,
from include/linux/bitops.h:32,
from include/linux/kernel.h:11,
from include/asm-generic/bug.h:20,
from arch/sh/include/asm/bug.h:112,
from include/linux/bug.h:5,
from include/linux/page-flags.h:10,
from kernel/bounds.c:10:
include/asm-generic/bitops/find.h:164:16: note: previous implicit declaration of
'__fls' was here
164 | return val ? __fls(val) : size;
| ^~~~~
cc1: some warnings being treated as errors
--
In file included from include/asm-generic/bitops/le.h:5,
from arch/sh/include/asm/bitops.h:65,
from include/linux/bitops.h:32,
from include/linux/kernel.h:11,
from include/asm-generic/bug.h:20,
from arch/sh/include/asm/bug.h:112,
from include/linux/bug.h:5,
from include/linux/page-flags.h:10,
from kernel/bounds.c:10:
include/asm-generic/bitops/find.h: In function 'find_last_bit':
> include/asm-generic/bitops/find.h:164:16: error: implicit
declaration of function '__fls'; did you mean '__ffs'?
[-Werror=implicit-function-declaration]
164 | return val ? __fls(val) :
size;
| ^~~~~
| __ffs
In file included from arch/sh/include/asm/bitops.h:68,
from include/linux/bitops.h:32,
from include/linux/kernel.h:11,
from include/asm-generic/bug.h:20,
from arch/sh/include/asm/bug.h:112,
from include/linux/bug.h:5,
from include/linux/page-flags.h:10,
from kernel/bounds.c:10:
include/asm-generic/bitops/__fls.h: At top level:
> include/asm-generic/bitops/__fls.h:13:38: error: conflicting
types for '__fls'
13 | static __always_inline unsigned long
__fls(unsigned long word)
| ^~~~~
In file included from include/asm-generic/bitops/le.h:5,
from arch/sh/include/asm/bitops.h:65,
from include/linux/bitops.h:32,
from include/linux/kernel.h:11,
from include/asm-generic/bug.h:20,
from arch/sh/include/asm/bug.h:112,
from include/linux/bug.h:5,
from include/linux/page-flags.h:10,
from kernel/bounds.c:10:
include/asm-generic/bitops/find.h:164:16: note: previous implicit declaration of
'__fls' was here
164 | return val ? __fls(val) : size;
| ^~~~~
cc1: some warnings being treated as errors
make[2]: *** [scripts/Makefile.build:116: kernel/bounds.s] Error 1
make[2]: Target '__build' not remade because of errors.
make[1]: *** [Makefile:1233: prepare0] Error 2
make[1]: Target 'prepare' not remade because of errors.
make: *** [Makefile:215: __sub-make] Error 2
make: Target 'prepare' not remade because of errors.
vim +164 include/asm-generic/bitops/find.h
149
150 #ifndef find_last_bit
151 /**
152 * find_last_bit - find the last set bit in a memory region
153 * @addr: The address to start the search at
154 * @size: The number of bits to search
155 *
156 * Returns the bit number of the last set bit, or size.
157 */
158 static inline
159 unsigned long find_last_bit(const unsigned long *addr, unsigned long size)
160 {
161 if (small_const_nbits(size)) {
162 unsigned long val = *addr & BITS_FIRST(size - 1);
163
164 return val ? __fls(val) : size;
165 }
166
167 return _find_last_bit(addr, size);
168 }
169 #endif
170
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org