Messages in this thread | | | Date | Tue, 10 Oct 2023 02:30:35 +0800 | From | kernel test robot <> | Subject | kernel/fork.c:1134: warning: Function parameter or member 'mm' not described in 'set_mm_exe_file' |
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 94f6f0550c625fab1f373bb86a6669b45e9748b3 commit: b1fbfcb4a20949df08dd995927cdc5ad220c128d kbuild: make single target builds even faster date: 3 years, 11 months ago config: openrisc-allnoconfig (https://download.01.org/0day-ci/archive/20231010/202310100237.RjecPfNo-lkp@intel.com/config) compiler: or1k-linux-gcc (GCC) 12.3.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231010/202310100237.RjecPfNo-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/202310100237.RjecPfNo-lkp@intel.com/
All warnings (new ones prefixed by >>):
>> kernel/fork.c:1134: warning: Function parameter or member 'mm' not described in 'set_mm_exe_file' >> kernel/fork.c:1134: warning: Function parameter or member 'new_exe_file' not described in 'set_mm_exe_file' >> kernel/fork.c:1158: warning: Function parameter or member 'mm' not described in 'get_mm_exe_file' >> kernel/fork.c:1178: warning: Function parameter or member 'task' not described in 'get_task_exe_file' >> kernel/fork.c:1203: warning: Function parameter or member 'task' not described in 'get_task_mm' -- >> kernel/reboot.c:214: warning: Function parameter or member 'cmd' not described in 'do_kernel_restart' -- >> kernel/irq_work.c:53:13: warning: no previous prototype for 'arch_irq_work_raise' [-Wmissing-prototypes] 53 | void __weak arch_irq_work_raise(void) | ^~~~~~~~~~~~~~~~~~~ -- >> kernel/stacktrace.c:139: warning: Function parameter or member 'tsk' not described in 'stack_trace_save_tsk' >> kernel/stacktrace.c:139: warning: Excess function parameter 'task' description in 'stack_trace_save_tsk' -- >> lib/argv_split.c:36: warning: Function parameter or member 'argv' not described in 'argv_free' -- >> lib/scatterlist.c:270: warning: Function parameter or member 'first_chunk' not described in '__sg_alloc_table' >> lib/scatterlist.c:676: warning: Function parameter or member 'flags' not described in 'sg_miter_start' -- >> lib/hweight.c:14: warning: Function parameter or member 'w' not described in '__sw_hweight32' lib/hweight.c:14: warning: Excess function parameter 'x' description in '__sw_hweight32' -- >> kernel/irq/irqdomain.c:105: warning: Function parameter or member 'fwnode' not described in 'irq_domain_free_fwnode' >> kernel/irq/irqdomain.c:930: warning: Function parameter or member 'd' not described in 'irq_domain_xlate_onecell' >> kernel/irq/irqdomain.c:930: warning: Function parameter or member 'ctrlr' not described in 'irq_domain_xlate_onecell' >> kernel/irq/irqdomain.c:930: warning: Function parameter or member 'intspec' not described in 'irq_domain_xlate_onecell' >> kernel/irq/irqdomain.c:930: warning: Function parameter or member 'intsize' not described in 'irq_domain_xlate_onecell' >> kernel/irq/irqdomain.c:930: warning: Function parameter or member 'out_hwirq' not described in 'irq_domain_xlate_onecell' >> kernel/irq/irqdomain.c:930: warning: Function parameter or member 'out_type' not described in 'irq_domain_xlate_onecell' >> kernel/irq/irqdomain.c:949: warning: Function parameter or member 'd' not described in 'irq_domain_xlate_twocell' >> kernel/irq/irqdomain.c:949: warning: Function parameter or member 'ctrlr' not described in 'irq_domain_xlate_twocell' >> kernel/irq/irqdomain.c:949: warning: Function parameter or member 'intspec' not described in 'irq_domain_xlate_twocell' >> kernel/irq/irqdomain.c:949: warning: Function parameter or member 'intsize' not described in 'irq_domain_xlate_twocell' >> kernel/irq/irqdomain.c:949: warning: Function parameter or member 'out_hwirq' not described in 'irq_domain_xlate_twocell' >> kernel/irq/irqdomain.c:949: warning: Function parameter or member 'out_type' not described in 'irq_domain_xlate_twocell' >> kernel/irq/irqdomain.c:972: warning: Function parameter or member 'd' not described in 'irq_domain_xlate_onetwocell' >> kernel/irq/irqdomain.c:972: warning: Function parameter or member 'ctrlr' not described in 'irq_domain_xlate_onetwocell' >> kernel/irq/irqdomain.c:972: warning: Function parameter or member 'intspec' not described in 'irq_domain_xlate_onetwocell' >> kernel/irq/irqdomain.c:972: warning: Function parameter or member 'intsize' not described in 'irq_domain_xlate_onetwocell' >> kernel/irq/irqdomain.c:972: warning: Function parameter or member 'out_hwirq' not described in 'irq_domain_xlate_onetwocell' >> kernel/irq/irqdomain.c:972: warning: Function parameter or member 'out_type' not described in 'irq_domain_xlate_onetwocell' >> kernel/irq/irqdomain.c:1001: warning: Function parameter or member 'd' not described in 'irq_domain_translate_twocell' kernel/irq/irqdomain.c:1001: warning: Function parameter or member 'fwspec' not described in 'irq_domain_translate_twocell' kernel/irq/irqdomain.c:1001: warning: Function parameter or member 'out_hwirq' not described in 'irq_domain_translate_twocell' kernel/irq/irqdomain.c:1001: warning: Function parameter or member 'out_type' not described in 'irq_domain_translate_twocell' kernel/irq/irqdomain.c:1580: warning: Function parameter or member 'domain' not described in 'irq_domain_alloc_irqs_parent' kernel/irq/irqdomain.c:1599: warning: Function parameter or member 'domain' not described in 'irq_domain_free_irqs_parent' -- kernel/sched/fair.c:5095:6: warning: no previous prototype for 'init_cfs_bandwidth' [-Wmissing-prototypes] 5095 | void init_cfs_bandwidth(struct cfs_bandwidth *cfs_b) {} | ^~~~~~~~~~~~~~~~~~ >> kernel/sched/fair.c:10384:6: warning: no previous prototype for 'free_fair_sched_group' [-Wmissing-prototypes] 10384 | void free_fair_sched_group(struct task_group *tg) { } | ^~~~~~~~~~~~~~~~~~~~~ >> kernel/sched/fair.c:10386:5: warning: no previous prototype for 'alloc_fair_sched_group' [-Wmissing-prototypes] 10386 | int alloc_fair_sched_group(struct task_group *tg, struct task_group *parent) | ^~~~~~~~~~~~~~~~~~~~~~ kernel/sched/fair.c:10391:6: warning: no previous prototype for 'online_fair_sched_group' [-Wmissing-prototypes] 10391 | void online_fair_sched_group(struct task_group *tg) { } | ^~~~~~~~~~~~~~~~~~~~~~~ >> kernel/sched/fair.c:10393:6: warning: no previous prototype for 'unregister_fair_sched_group' [-Wmissing-prototypes] 10393 | void unregister_fair_sched_group(struct task_group *tg) { } | ^~~~~~~~~~~~~~~~~~~~~~~~~~~ -- >> kernel/time/tick-broadcast.c:884: warning: Function parameter or member 'bc' not described in 'tick_broadcast_setup_oneshot' -- kernel/time/timekeeping.c:403: warning: Function parameter or member 'tkf' not described in 'update_fast_timekeeper' kernel/time/timekeeping.c:452: warning: Function parameter or member 'tkf' not described in '__ktime_get_fast_ns' kernel/time/timekeeping.c:585: warning: Function parameter or member 'nb' not described in 'pvclock_gtod_register_notifier' kernel/time/timekeeping.c:604: warning: Function parameter or member 'nb' not described in 'pvclock_gtod_unregister_notifier' kernel/time/timekeeping.c:698: warning: Function parameter or member 'tk' not described in 'timekeeping_forward_now' kernel/time/timekeeping.c:1274: warning: Function parameter or member 'ts' not described in 'timekeeping_inject_offset' kernel/time/timekeeping.c:1274: warning: Excess function parameter 'tv' description in 'timekeeping_inject_offset' kernel/time/timekeeping.c:1350: warning: Function parameter or member 'tk' not described in '__timekeeping_set_tai_offset' kernel/time/timekeeping.c:1350: warning: Function parameter or member 'tai_offset' not described in '__timekeeping_set_tai_offset' kernel/time/timekeeping.c:1361: warning: Function parameter or member 'data' not described in 'change_clocksource' kernel/time/timekeeping.c:1486: warning: Function parameter or member 'ts' not described in 'read_persistent_clock64' kernel/time/timekeeping.c:1506: warning: Function parameter or member 'wall_time' not described in 'read_persistent_wall_and_boot_offset' kernel/time/timekeeping.c:1506: warning: Function parameter or member 'boot_offset' not described in 'read_persistent_wall_and_boot_offset' kernel/time/timekeeping.c:1589: warning: Function parameter or member 'tk' not described in '__timekeeping_inject_sleeptime' kernel/time/timekeeping.c:1962: warning: Function parameter or member 'tk' not described in 'accumulate_nsecs_to_secs' kernel/time/timekeeping.c:2012: warning: Function parameter or member 'tk' not described in 'logarithmic_accumulation' kernel/time/timekeeping.c:2012: warning: Function parameter or member 'offset' not described in 'logarithmic_accumulation' kernel/time/timekeeping.c:2012: warning: Function parameter or member 'shift' not described in 'logarithmic_accumulation' kernel/time/timekeeping.c:2012: warning: Function parameter or member 'clock_set' not described in 'logarithmic_accumulation' kernel/time/timekeeping.c:2248: warning: Function parameter or member 'txc' not described in 'timekeeping_validate_timex' >> kernel/time/timekeeping.c:2314: warning: Function parameter or member 'txc' not described in 'do_adjtimex' >> kernel/time/timekeeping.c:2378: warning: Function parameter or member 'phase_ts' not described in 'hardpps' >> kernel/time/timekeeping.c:2378: warning: Function parameter or member 'raw_ts' not described in 'hardpps'
vim +1134 kernel/fork.c
a1b2289cef92ef Sherry Yang 2017-10-03 1121 90f31d0ea88880 Konstantin Khlebnikov 2015-04-16 1122 /** 90f31d0ea88880 Konstantin Khlebnikov 2015-04-16 1123 * set_mm_exe_file - change a reference to the mm's executable file 90f31d0ea88880 Konstantin Khlebnikov 2015-04-16 1124 * 90f31d0ea88880 Konstantin Khlebnikov 2015-04-16 1125 * This changes mm's executable file (shown as symlink /proc/[pid]/exe). 90f31d0ea88880 Konstantin Khlebnikov 2015-04-16 1126 * 6e399cd144d850 Davidlohr Bueso 2015-04-16 1127 * Main users are mmput() and sys_execve(). Callers prevent concurrent 6e399cd144d850 Davidlohr Bueso 2015-04-16 1128 * invocations: in mmput() nobody alive left, in execve task is single 6e399cd144d850 Davidlohr Bueso 2015-04-16 1129 * threaded. sys_prctl(PR_SET_MM_MAP/EXE_FILE) also needs to set the 6e399cd144d850 Davidlohr Bueso 2015-04-16 1130 * mm->exe_file, but does so without using set_mm_exe_file() in order 6e399cd144d850 Davidlohr Bueso 2015-04-16 1131 * to do avoid the need for any locks. 90f31d0ea88880 Konstantin Khlebnikov 2015-04-16 1132 */ 3864601387cf41 Jiri Slaby 2011-05-26 1133 void set_mm_exe_file(struct mm_struct *mm, struct file *new_exe_file) 3864601387cf41 Jiri Slaby 2011-05-26 @1134 { 6e399cd144d850 Davidlohr Bueso 2015-04-16 1135 struct file *old_exe_file; 6e399cd144d850 Davidlohr Bueso 2015-04-16 1136 6e399cd144d850 Davidlohr Bueso 2015-04-16 1137 /* 6e399cd144d850 Davidlohr Bueso 2015-04-16 1138 * It is safe to dereference the exe_file without RCU as 6e399cd144d850 Davidlohr Bueso 2015-04-16 1139 * this function is only called if nobody else can access 6e399cd144d850 Davidlohr Bueso 2015-04-16 1140 * this mm -- see comment above for justification. 6e399cd144d850 Davidlohr Bueso 2015-04-16 1141 */ 6e399cd144d850 Davidlohr Bueso 2015-04-16 1142 old_exe_file = rcu_dereference_raw(mm->exe_file); 90f31d0ea88880 Konstantin Khlebnikov 2015-04-16 1143 3864601387cf41 Jiri Slaby 2011-05-26 1144 if (new_exe_file) 3864601387cf41 Jiri Slaby 2011-05-26 1145 get_file(new_exe_file); 90f31d0ea88880 Konstantin Khlebnikov 2015-04-16 1146 rcu_assign_pointer(mm->exe_file, new_exe_file); 90f31d0ea88880 Konstantin Khlebnikov 2015-04-16 1147 if (old_exe_file) 90f31d0ea88880 Konstantin Khlebnikov 2015-04-16 1148 fput(old_exe_file); 3864601387cf41 Jiri Slaby 2011-05-26 1149 } 3864601387cf41 Jiri Slaby 2011-05-26 1150 90f31d0ea88880 Konstantin Khlebnikov 2015-04-16 1151 /** 90f31d0ea88880 Konstantin Khlebnikov 2015-04-16 1152 * get_mm_exe_file - acquire a reference to the mm's executable file 90f31d0ea88880 Konstantin Khlebnikov 2015-04-16 1153 * 90f31d0ea88880 Konstantin Khlebnikov 2015-04-16 1154 * Returns %NULL if mm has no associated executable file. 90f31d0ea88880 Konstantin Khlebnikov 2015-04-16 1155 * User must release file via fput(). 90f31d0ea88880 Konstantin Khlebnikov 2015-04-16 1156 */ 3864601387cf41 Jiri Slaby 2011-05-26 1157 struct file *get_mm_exe_file(struct mm_struct *mm) 3864601387cf41 Jiri Slaby 2011-05-26 @1158 { 3864601387cf41 Jiri Slaby 2011-05-26 1159 struct file *exe_file; 3864601387cf41 Jiri Slaby 2011-05-26 1160 90f31d0ea88880 Konstantin Khlebnikov 2015-04-16 1161 rcu_read_lock(); 90f31d0ea88880 Konstantin Khlebnikov 2015-04-16 1162 exe_file = rcu_dereference(mm->exe_file); 90f31d0ea88880 Konstantin Khlebnikov 2015-04-16 1163 if (exe_file && !get_file_rcu(exe_file)) 90f31d0ea88880 Konstantin Khlebnikov 2015-04-16 1164 exe_file = NULL; 90f31d0ea88880 Konstantin Khlebnikov 2015-04-16 1165 rcu_read_unlock(); 3864601387cf41 Jiri Slaby 2011-05-26 1166 return exe_file; 3864601387cf41 Jiri Slaby 2011-05-26 1167 } 11163348a23cdb Davidlohr Bueso 2015-04-16 1168 EXPORT_SYMBOL(get_mm_exe_file); 3864601387cf41 Jiri Slaby 2011-05-26 1169 cd81a9170e69e0 Mateusz Guzik 2016-08-23 1170 /** cd81a9170e69e0 Mateusz Guzik 2016-08-23 1171 * get_task_exe_file - acquire a reference to the task's executable file cd81a9170e69e0 Mateusz Guzik 2016-08-23 1172 * cd81a9170e69e0 Mateusz Guzik 2016-08-23 1173 * Returns %NULL if task's mm (if any) has no associated executable file or cd81a9170e69e0 Mateusz Guzik 2016-08-23 1174 * this is a kernel thread with borrowed mm (see the comment above get_task_mm). cd81a9170e69e0 Mateusz Guzik 2016-08-23 1175 * User must release file via fput(). cd81a9170e69e0 Mateusz Guzik 2016-08-23 1176 */ cd81a9170e69e0 Mateusz Guzik 2016-08-23 1177 struct file *get_task_exe_file(struct task_struct *task) cd81a9170e69e0 Mateusz Guzik 2016-08-23 @1178 { cd81a9170e69e0 Mateusz Guzik 2016-08-23 1179 struct file *exe_file = NULL; cd81a9170e69e0 Mateusz Guzik 2016-08-23 1180 struct mm_struct *mm; cd81a9170e69e0 Mateusz Guzik 2016-08-23 1181 cd81a9170e69e0 Mateusz Guzik 2016-08-23 1182 task_lock(task); cd81a9170e69e0 Mateusz Guzik 2016-08-23 1183 mm = task->mm; cd81a9170e69e0 Mateusz Guzik 2016-08-23 1184 if (mm) { cd81a9170e69e0 Mateusz Guzik 2016-08-23 1185 if (!(task->flags & PF_KTHREAD)) cd81a9170e69e0 Mateusz Guzik 2016-08-23 1186 exe_file = get_mm_exe_file(mm); cd81a9170e69e0 Mateusz Guzik 2016-08-23 1187 } cd81a9170e69e0 Mateusz Guzik 2016-08-23 1188 task_unlock(task); cd81a9170e69e0 Mateusz Guzik 2016-08-23 1189 return exe_file; cd81a9170e69e0 Mateusz Guzik 2016-08-23 1190 } cd81a9170e69e0 Mateusz Guzik 2016-08-23 1191 EXPORT_SYMBOL(get_task_exe_file); 3864601387cf41 Jiri Slaby 2011-05-26 1192 ^1da177e4c3f41 Linus Torvalds 2005-04-16 1193 /** ^1da177e4c3f41 Linus Torvalds 2005-04-16 1194 * get_task_mm - acquire a reference to the task's mm ^1da177e4c3f41 Linus Torvalds 2005-04-16 1195 * 246bb0b1deb297 Oleg Nesterov 2008-07-25 1196 * Returns %NULL if the task has no mm. Checks PF_KTHREAD (meaning ^1da177e4c3f41 Linus Torvalds 2005-04-16 1197 * this kernel workthread has transiently adopted a user mm with use_mm, ^1da177e4c3f41 Linus Torvalds 2005-04-16 1198 * to do its AIO) is not set and if so returns a reference to it, after ^1da177e4c3f41 Linus Torvalds 2005-04-16 1199 * bumping up the use count. User must release the mm via mmput() ^1da177e4c3f41 Linus Torvalds 2005-04-16 1200 * after use. Typically used by /proc and ptrace. ^1da177e4c3f41 Linus Torvalds 2005-04-16 1201 */ ^1da177e4c3f41 Linus Torvalds 2005-04-16 1202 struct mm_struct *get_task_mm(struct task_struct *task) ^1da177e4c3f41 Linus Torvalds 2005-04-16 @1203 { ^1da177e4c3f41 Linus Torvalds 2005-04-16 1204 struct mm_struct *mm; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1205 ^1da177e4c3f41 Linus Torvalds 2005-04-16 1206 task_lock(task); ^1da177e4c3f41 Linus Torvalds 2005-04-16 1207 mm = task->mm; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1208 if (mm) { 246bb0b1deb297 Oleg Nesterov 2008-07-25 1209 if (task->flags & PF_KTHREAD) ^1da177e4c3f41 Linus Torvalds 2005-04-16 1210 mm = NULL; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1211 else 3fce371bfac2be Vegard Nossum 2017-02-27 1212 mmget(mm); ^1da177e4c3f41 Linus Torvalds 2005-04-16 1213 } ^1da177e4c3f41 Linus Torvalds 2005-04-16 1214 task_unlock(task); ^1da177e4c3f41 Linus Torvalds 2005-04-16 1215 return mm; ^1da177e4c3f41 Linus Torvalds 2005-04-16 1216 } ^1da177e4c3f41 Linus Torvalds 2005-04-16 1217 EXPORT_SYMBOL_GPL(get_task_mm); ^1da177e4c3f41 Linus Torvalds 2005-04-16 1218
:::::: The code at line 1134 was first introduced by commit :::::: 3864601387cf4196371e3c1897fdffa5228296f9 mm: extract exe_file handling from procfs
:::::: TO: Jiri Slaby <jslaby@suse.cz> :::::: CC: Linus Torvalds <torvalds@linux-foundation.org>
-- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
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