From: kernel test robot <lkp@intel.com>
To: kernel@openeuler.org, xiongzhou4 <xiongzhou4@huawei.com>
Cc: oe-kbuild-all@lists.linux.dev
Subject: [openeuler:OLK-5.10 21262/30000] kernel/gcov/gcc_base.c:92:6: warning: no previous prototype for '__gcov_merge_topn'
Date: Sun, 31 Mar 2024 11:47:18 +0800 [thread overview]
Message-ID: <202403311107.WlS3rnFu-lkp@intel.com> (raw)
tree: https://gitee.com/openeuler/kernel.git OLK-5.10
head: 737efe73dd2ca6ee503ba26e6fc3ee41bd8cf633
commit: 2872514ea26634954ebf05f31ee1691111502df5 [21262/30000] GCC: Add value profile support for kernel.
config: x86_64-randconfig-011-20240331 (https://download.01.org/0day-ci/archive/20240331/202403311107.WlS3rnFu-lkp@intel.com/config)
compiler: gcc-10 (Ubuntu 10.5.0-1ubuntu1) 10.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240331/202403311107.WlS3rnFu-lkp@intel.com/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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202403311107.WlS3rnFu-lkp@intel.com/
All warnings (new ones prefixed by >>):
drivers/media/dvb-core/dvb_net.c: In function 'dvb_net_add_if':
>> drivers/media/dvb-core/dvb_net.c:1362:41: warning: '%d' directive output may be truncated writing between 1 and 10 bytes into a region of size between 0 and 11 [-Wformat-truncation=]
1362 | snprintf(net->name, IFNAMSIZ, "dvb%d%u%d",
| ^~
drivers/media/dvb-core/dvb_net.c:1362:33: note: directive argument in the range [0, 2147483647]
1362 | snprintf(net->name, IFNAMSIZ, "dvb%d%u%d",
| ^~~~~~~~~~~
drivers/media/dvb-core/dvb_net.c:1362:3: note: 'snprintf' output between 7 and 35 bytes into a destination of size 16
1362 | snprintf(net->name, IFNAMSIZ, "dvb%d%u%d",
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1363 | dvbnet->dvbdev->adapter->num, dvbnet->dvbdev->id, if_num);
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
--
kernel/gcov/gcc_base.c:12:6: warning: no previous prototype for '__gcov_init' [-Wmissing-prototypes]
12 | void __gcov_init(struct gcov_info *info)
| ^~~~~~~~~~~
kernel/gcov/gcc_base.c:40:6: warning: no previous prototype for '__gcov_flush' [-Wmissing-prototypes]
40 | void __gcov_flush(void)
| ^~~~~~~~~~~~
kernel/gcov/gcc_base.c:46:6: warning: no previous prototype for '__gcov_merge_add' [-Wmissing-prototypes]
46 | void __gcov_merge_add(gcov_type *counters, unsigned int n_counters)
| ^~~~~~~~~~~~~~~~
kernel/gcov/gcc_base.c:52:6: warning: no previous prototype for '__gcov_merge_single' [-Wmissing-prototypes]
52 | void __gcov_merge_single(gcov_type *counters, unsigned int n_counters)
| ^~~~~~~~~~~~~~~~~~~
kernel/gcov/gcc_base.c:58:6: warning: no previous prototype for '__gcov_merge_delta' [-Wmissing-prototypes]
58 | void __gcov_merge_delta(gcov_type *counters, unsigned int n_counters)
| ^~~~~~~~~~~~~~~~~~
kernel/gcov/gcc_base.c:64:6: warning: no previous prototype for '__gcov_merge_ior' [-Wmissing-prototypes]
64 | void __gcov_merge_ior(gcov_type *counters, unsigned int n_counters)
| ^~~~~~~~~~~~~~~~
kernel/gcov/gcc_base.c:70:6: warning: no previous prototype for '__gcov_merge_time_profile' [-Wmissing-prototypes]
70 | void __gcov_merge_time_profile(gcov_type *counters, unsigned int n_counters)
| ^~~~~~~~~~~~~~~~~~~~~~~~~
kernel/gcov/gcc_base.c:76:6: warning: no previous prototype for '__gcov_merge_icall_topn' [-Wmissing-prototypes]
76 | void __gcov_merge_icall_topn(gcov_type *counters, unsigned int n_counters)
| ^~~~~~~~~~~~~~~~~~~~~~~
kernel/gcov/gcc_base.c:82:6: warning: no previous prototype for '__gcov_exit' [-Wmissing-prototypes]
82 | void __gcov_exit(void)
| ^~~~~~~~~~~
>> kernel/gcov/gcc_base.c:92:6: warning: no previous prototype for '__gcov_merge_topn' [-Wmissing-prototypes]
92 | void __gcov_merge_topn(gcov_type *counters, unsigned int n_counters)
| ^~~~~~~~~~~~~~~~~
>> kernel/gcov/gcc_base.c:146:6: warning: no previous prototype for '__gcov_topn_values_profiler' [-Wmissing-prototypes]
146 | void __gcov_topn_values_profiler(gcov_type *counters, gcov_type value)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
>> kernel/gcov/gcc_base.c:165:6: warning: no previous prototype for '__gcov_indirect_call_profiler_v4' [-Wmissing-prototypes]
165 | void __gcov_indirect_call_profiler_v4(gcov_type value, void *cur_func)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> kernel/gcov/gcc_base.c:174:6: warning: no previous prototype for '__gcov_average_profiler' [-Wmissing-prototypes]
174 | void __gcov_average_profiler(gcov_type *counters, gcov_type value)
| ^~~~~~~~~~~~~~~~~~~~~~~
>> kernel/gcov/gcc_base.c:181:6: warning: no previous prototype for '__gcov_ior_profiler' [-Wmissing-prototypes]
181 | void __gcov_ior_profiler(gcov_type *counters, gcov_type value)
| ^~~~~~~~~~~~~~~~~~~
>> kernel/gcov/gcc_base.c:191:6: warning: no previous prototype for '__gcov_pow2_profiler' [-Wmissing-prototypes]
191 | void __gcov_pow2_profiler(gcov_type *counters, gcov_type value)
| ^~~~~~~~~~~~~~~~~~~~
>> kernel/gcov/gcc_base.c:206:6: warning: no previous prototype for '__gcov_interval_profiler' [-Wmissing-prototypes]
206 | void __gcov_interval_profiler(gcov_type *counters, gcov_type value,
| ^~~~~~~~~~~~~~~~~~~~~~~~
Kconfig warnings: (for reference only)
WARNING: unmet direct dependencies detected for PGP_PRELOAD
Depends on [n]: CRYPTO [=y] && ASYMMETRIC_KEY_TYPE [=n]
Selected by [y]:
- PGP_PRELOAD_PUBLIC_KEYS [=y] && CRYPTO [=y]
vim +/__gcov_merge_topn +92 kernel/gcov/gcc_base.c
69
> 70 void __gcov_merge_time_profile(gcov_type *counters, unsigned int n_counters)
71 {
72 /* Unused. */
73 }
74 EXPORT_SYMBOL(__gcov_merge_time_profile);
75
> 76 void __gcov_merge_icall_topn(gcov_type *counters, unsigned int n_counters)
77 {
78 /* Unused. */
79 }
80 EXPORT_SYMBOL(__gcov_merge_icall_topn);
81
> 82 void __gcov_exit(void)
83 {
84 /* Unused. */
85 }
86 EXPORT_SYMBOL(__gcov_exit);
87
88 #ifdef CONFIG_PGO_KERNEL
89 /* Number of top N value histogram. */
90 #define GCOV_TOPN_VALUES 4
91
> 92 void __gcov_merge_topn(gcov_type *counters, unsigned int n_counters)
93 {
94 /* Unused. */
95 }
96 EXPORT_SYMBOL(__gcov_merge_topn);
97
98 struct indirect_call_tuple {
99 void *callee;
100
101 gcov_type *counters;
102 };
103
104 /* Kernel does not support __thread keyword. */
105 struct indirect_call_tuple __gcov_indirect_call;
106 EXPORT_SYMBOL(__gcov_indirect_call);
107
108 gcov_type __gcov_time_profiler_counter;
109 EXPORT_SYMBOL(__gcov_time_profiler_counter);
110
111 /*
112 * Tries to determine N most commons value among its inputs.
113 */
114 static inline void __gcov_topn_values_profiler_body(gcov_type *counters,
115 gcov_type value)
116 {
117 int empty_counter = -1;
118 unsigned int i;
119
120 counters[0]++;
121 ++counters;
122
123 /* First try to find an existing value. */
124 for (i = 0; i < GCOV_TOPN_VALUES; i++)
125 if (value == counters[2 * i]) {
126 counters[2 * i + 1] += GCOV_TOPN_VALUES;
127 return;
128 } else if (counters[2 * i + 1] <= 0)
129 empty_counter = i;
130
131 /* Find an empty slot for a new value. */
132 if (empty_counter != -1) {
133 counters[2 * empty_counter] = value;
134 counters[2 * empty_counter + 1] = GCOV_TOPN_VALUES;
135 return;
136 }
137
138 /*
139 * We haven't found an empty slot, then decrement all
140 * counter values by one.
141 */
142 for (i = 0; i < GCOV_TOPN_VALUES; i++)
143 counters[2 * i + 1]--;
144 }
145
> 146 void __gcov_topn_values_profiler(gcov_type *counters, gcov_type value)
147 {
148 __gcov_topn_values_profiler_body(counters, value);
149 }
150 EXPORT_SYMBOL(__gcov_topn_values_profiler);
151
152 /*
153 * Tries to determine the most common value among its inputs.
154 */
155 static inline void __gcov_indirect_call_profiler_body(gcov_type value,
156 void *cur_func)
157 {
158 /* Removed the C++ virtual tables contents as kernel is written in C. */
159 if (cur_func == __gcov_indirect_call.callee)
160 __gcov_topn_values_profiler_body(__gcov_indirect_call.counters, value);
161
162 __gcov_indirect_call.callee = NULL;
163 }
164
> 165 void __gcov_indirect_call_profiler_v4(gcov_type value, void *cur_func)
166 {
167 __gcov_indirect_call_profiler_body(value, cur_func);
168 }
169 EXPORT_SYMBOL(__gcov_indirect_call_profiler_v4);
170
171 /*
172 * Increase corresponding COUNTER by VALUE.
173 */
> 174 void __gcov_average_profiler(gcov_type *counters, gcov_type value)
175 {
176 counters[0] += value;
177 counters[1]++;
178 }
179 EXPORT_SYMBOL(__gcov_average_profiler);
180
> 181 void __gcov_ior_profiler(gcov_type *counters, gcov_type value)
182 {
183 *counters |= value;
184 }
185 EXPORT_SYMBOL(__gcov_ior_profiler);
186
187 /*
188 * If VALUE is a power of two, COUNTERS[1] is incremented. Otherwise
189 * COUNTERS[0] is incremented.
190 */
> 191 void __gcov_pow2_profiler(gcov_type *counters, gcov_type value)
192 {
193 if (value == 0 || (value & (value - 1)))
194 counters[0]++;
195 else
196 counters[1]++;
197 }
198 EXPORT_SYMBOL(__gcov_pow2_profiler);
199
200 /*
201 * If VALUE is in interval <START, START + STEPS - 1>, then increases the
202 * corresponding counter in COUNTERS. If the VALUE is above or below
203 * the interval, COUNTERS[STEPS] or COUNTERS[STEPS + 1] is increased
204 * instead.
205 */
> 206 void __gcov_interval_profiler(gcov_type *counters, gcov_type value,
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
reply other threads:[~2024-03-31 3:48 UTC|newest]
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