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Message-ID: <202206250613.W0GZVb51-lkp@intel.com>
Date: Sat, 25 Jun 2022 10:59:39 +0800
From: kernel test robot <lkp@...el.com>
To: Yury Norov <yury.norov@...il.com>
Cc: kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: [norov:fns 13/15] include/linux/find.h:35:24: error: implicit
declaration of function 'find_next_bit'; did you mean '_find_next_bit'?
tree: https://github.com/norov/linux fns
head: 15f7ffc3e9c1d0388c86efdb29d9a2c32aac0697
commit: a59b3e90bb16de4e813c83e6481731bba0309cfa [13/15] find_next_bit_wrap
config: um-i386_defconfig
compiler: gcc-11 (Debian 11.3.0-3) 11.3.0
reproduce (this is a W=1 build):
# https://github.com/norov/linux/commit/a59b3e90bb16de4e813c83e6481731bba0309cfa
git remote add norov https://github.com/norov/linux
git fetch --no-tags norov fns
git checkout a59b3e90bb16de4e813c83e6481731bba0309cfa
# save the config file
mkdir build_dir && cp config build_dir/.config
make W=1 O=build_dir ARCH=um SUBARCH=i386 prepare
If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@...el.com>
All errors (new ones prefixed by >>):
arch/x86/um/user-offsets.c:17:6: warning: no previous prototype for 'foo' [-Wmissing-prototypes]
17 | void foo(void)
| ^~~
In file included from include/linux/bitmap.h:9,
from include/linux/cpumask.h:12,
from include/linux/smp.h:13,
from include/linux/lockdep.h:14,
from include/linux/rcupdate.h:29,
from include/linux/rculist.h:11,
from include/linux/pid.h:5,
from include/linux/sched.h:14,
from arch/x86/um/shared/sysdep/kernel-offsets.h:3,
from arch/um/kernel/asm-offsets.c:1:
include/linux/find.h: In function 'find_next_bit_wrap':
>> include/linux/find.h:35:24: error: implicit declaration of function 'find_next_bit'; did you mean '_find_next_bit'? [-Werror=implicit-function-declaration]
35 | from = find_next_bit(addr, to, from);
| ^~~~~~~~~~~~~
| _find_next_bit
>> include/linux/find.h:43:16: error: implicit declaration of function 'find_first_bit'; did you mean '_find_first_bit'? [-Werror=implicit-function-declaration]
43 | from = find_first_bit(addr, to);
| ^~~~~~~~~~~~~~
| _find_first_bit
include/linux/find.h: At top level:
>> include/linux/find.h:58:15: error: conflicting types for 'find_next_bit'; have 'long unsigned int(const long unsigned int *, long unsigned int, long unsigned int)'
58 | unsigned long find_next_bit(const unsigned long *addr, unsigned long size,
| ^~~~~~~~~~~~~
include/linux/find.h:35:24: note: previous implicit declaration of 'find_next_bit' with type 'int()'
35 | from = find_next_bit(addr, to, from);
| ^~~~~~~~~~~~~
>> include/linux/find.h:143:15: error: conflicting types for 'find_first_bit'; have 'long unsigned int(const long unsigned int *, long unsigned int)'
143 | unsigned long find_first_bit(const unsigned long *addr, unsigned long size)
| ^~~~~~~~~~~~~~
include/linux/find.h:43:16: note: previous implicit declaration of 'find_first_bit' with type 'int()'
43 | from = find_first_bit(addr, to);
| ^~~~~~~~~~~~~~
In file included from include/linux/sched.h:22,
from arch/x86/um/shared/sysdep/kernel-offsets.h:3,
from arch/um/kernel/asm-offsets.c:1:
include/linux/nodemask.h: In function '__next_node_in':
>> include/linux/nodemask.h:281:61: error: 'n' undeclared (first use in this function)
281 | return find_next_bit_wrap(srcp->bits, MAX_NUMNODES, n+1, n+1);
| ^
include/linux/nodemask.h:281:61: note: each undeclared identifier is reported only once for each function it appears in
In file included from arch/um/kernel/asm-offsets.c:1:
arch/x86/um/shared/sysdep/kernel-offsets.h: At top level:
arch/x86/um/shared/sysdep/kernel-offsets.h:9:6: warning: no previous prototype for 'foo' [-Wmissing-prototypes]
9 | void foo(void)
| ^~~
cc1: some warnings being treated as errors
make[2]: *** [scripts/Makefile.build:117: arch/um/kernel/asm-offsets.s] Error 1
make[2]: Target '__build' not remade because of errors.
make[1]: *** [Makefile:1200: prepare0] Error 2
make[1]: Target 'prepare' not remade because of errors.
make: *** [Makefile:219: __sub-make] Error 2
make: Target 'prepare' not remade because of errors.
vim +35 include/linux/find.h
20
21 /**
22 * find_next_bit_wrap - find the next set bit in a memory region
23 * @addr: The address to base the search on
24 * @size: The bitmap size in bits
25 * @offset: The bitnumber to start searching at
26 *
27 * Returns the bit number for the next set bit
28 * If no bits are set, returns @size.
29 */
30 static inline
31 unsigned long find_next_bit_wrap(const unsigned long *addr, unsigned long size,
32 unsigned long from, unsigned long to)
33 {
34 if (from < to) {
> 35 from = find_next_bit(addr, to, from);
36 return from < to ? from : size;
37 }
38
39 from = find_next_bit(addr, size, from);
40 if (from < size)
41 return from;
42
> 43 from = find_first_bit(addr, to);
44 return from < to ? from : size;
45 }
46
47 #ifndef find_next_bit
48 /**
49 * find_next_bit - find the next set bit in a memory region
50 * @addr: The address to base the search on
51 * @size: The bitmap size in bits
52 * @offset: The bitnumber to start searching at
53 *
54 * Returns the bit number for the next set bit
55 * If no bits are set, returns @size.
56 */
57 static inline
> 58 unsigned long find_next_bit(const unsigned long *addr, unsigned long size,
59 unsigned long offset)
60 {
61 if (small_const_nbits(size)) {
62 unsigned long val;
63
64 if (unlikely(offset >= size))
65 return size;
66
67 val = *addr & GENMASK(size - 1, offset);
68 return val ? __ffs(val) : size;
69 }
70
71 return _find_next_bit(addr, NULL, size, offset, 0UL, 0);
72 }
73 #endif
74
75 #ifndef find_next_and_bit
76 /**
77 * find_next_and_bit - find the next set bit in both memory regions
78 * @addr1: The first address to base the search on
79 * @addr2: The second address to base the search on
80 * @size: The bitmap size in bits
81 * @offset: The bitnumber to start searching at
82 *
83 * Returns the bit number for the next set bit
84 * If no bits are set, returns @size.
85 */
86 static inline
87 unsigned long find_next_and_bit(const unsigned long *addr1,
88 const unsigned long *addr2, unsigned long size,
89 unsigned long offset)
90 {
91 if (small_const_nbits(size)) {
92 unsigned long val;
93
94 if (unlikely(offset >= size))
95 return size;
96
97 val = *addr1 & *addr2 & GENMASK(size - 1, offset);
98 return val ? __ffs(val) : size;
99 }
100
101 return _find_next_bit(addr1, addr2, size, offset, 0UL, 0);
102 }
103 #endif
104
105 #ifndef find_next_zero_bit
106 /**
107 * find_next_zero_bit - find the next cleared bit in a memory region
108 * @addr: The address to base the search on
109 * @size: The bitmap size in bits
110 * @offset: The bitnumber to start searching at
111 *
112 * Returns the bit number of the next zero bit
113 * If no bits are zero, returns @size.
114 */
115 static inline
116 unsigned long find_next_zero_bit(const unsigned long *addr, unsigned long size,
117 unsigned long offset)
118 {
119 if (small_const_nbits(size)) {
120 unsigned long val;
121
122 if (unlikely(offset >= size))
123 return size;
124
125 val = *addr | ~GENMASK(size - 1, offset);
126 return val == ~0UL ? size : ffz(val);
127 }
128
129 return _find_next_bit(addr, NULL, size, offset, ~0UL, 0);
130 }
131 #endif
132
133 #ifndef find_first_bit
134 /**
135 * find_first_bit - find the first set bit in a memory region
136 * @addr: The address to start the search at
137 * @size: The maximum number of bits to search
138 *
139 * Returns the bit number of the first set bit.
140 * If no bits are set, returns @size.
141 */
142 static inline
> 143 unsigned long find_first_bit(const unsigned long *addr, unsigned long size)
144 {
145 if (small_const_nbits(size)) {
146 unsigned long val = *addr & GENMASK(size - 1, 0);
147
148 return val ? __ffs(val) : size;
149 }
150
151 return _find_first_bit(addr, size);
152 }
153 #endif
154
--
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