[kbuild-all] [tip:tmp.tmp2 154/364] include/linux/latencytop.h:41:30: warning: 'struct ctl_table' declared inside parameter list will not be visible outside of this definition or declaration

tree: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git tmp.tmp2 head: adcceb5eb7aee38e4a9c15bdf599655f0e1b1324 commit: 6ca85f643325cbbcd70bc08bfab7ee67c26b8607 [154/364] sched/headers: Remove <linux/nodemask.h> from <linux/sched.h> config: x86_64-rhel-8.3 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=6c... git remote add tip https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git git fetch --no-tags tip tmp.tmp2 git checkout 6ca85f643325cbbcd70bc08bfab7ee67c26b8607 # save the attached .config to linux build tree make W=1 ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): In file included from include/linux/sched.h:22, from include/linux/uaccess.h:9, from kernel/header_test_uaccess.h.c:1: 41 | int sysctl_latencytop(struct ctl_table *table, int write, void *buffer, | ^~~~~~~~~ -- In file included from include/linux/sched.h:22, from include/linux/utsname.h:6, from drivers/char/random.c:312: 41 | int sysctl_latencytop(struct ctl_table *table, int write, void *buffer, | ^~~~~~~~~ drivers/char/random.c:2273:6: warning: no previous prototype for 'add_hwgenerator_randomness' [-Wmissing-prototypes] 2273 | void add_hwgenerator_randomness(const char *buffer, size_t count, | ^~~~~~~~~~~~~~~~~~~~~~~~~~ -- In file included from include/linux/sched.h:22, from include/linux/sched/cond_resched.h:9, from kernel/sched/core.c:9: 41 | int sysctl_latencytop(struct ctl_table *table, int write, void *buffer, | ^~~~~~~~~ kernel/sched/core.c:3315:6: warning: no previous prototype for 'sched_set_stop_task' [-Wmissing-prototypes] 3315 | void sched_set_stop_task(int cpu, struct task_struct *stop) | ^~~~~~~~~~~~~~~~~~~ kernel/sched/core.c:9032:13: warning: no previous prototype for 'per_task_init' [-Wmissing-prototypes] 9032 | void __init per_task_init(void) | ^~~~~~~~~~~~~ -- In file included from include/linux/sched.h:22, from kernel/sched/sched.h:8, from kernel/sched/fair.c:23: 41 | int sysctl_latencytop(struct ctl_table *table, int write, void *buffer, | ^~~~~~~~~ kernel/sched/fair.c:10856:6: warning: no previous prototype for 'task_vruntime_update' [-Wmissing-prototypes] 10856 | void task_vruntime_update(struct rq *rq, struct task_struct *p, bool in_fi) | ^~~~~~~~~~~~~~~~~~~~ -- In file included from include/linux/sched.h:22, from kernel/sched/sched.h:8, from kernel/sched/rt.c:6: 41 | int sysctl_latencytop(struct ctl_table *table, int write, void *buffer, | ^~~~~~~~~ In file included from <command-line>: kernel/sched/rt.c: In function 'rt_task_of': include/linux/kernel.h:706:51: error: 'struct task_struct' has no member named 'rt' 706 | BUILD_BUG_ON_MSG(!__same_type(*(ptr), ((type *)0)->member) && \ | ^~ include/linux/compiler_types.h:308:9: note: in definition of macro '__compiletime_assert' 308 | if (!(condition)) \ | ^~~~~~~~~ include/linux/compiler_types.h:328:2: note: in expansion of macro '_compiletime_assert' 328 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) | ^~~~~~~~~~~~~~~~~~~ include/linux/build_bug.h:39:37: note: in expansion of macro 'compiletime_assert' 39 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg) | ^~~~~~~~~~~~~~~~~~ include/linux/kernel.h:706:2: note: in expansion of macro 'BUILD_BUG_ON_MSG' 706 | BUILD_BUG_ON_MSG(!__same_type(*(ptr), ((type *)0)->member) && \ | ^~~~~~~~~~~~~~~~ include/linux/kernel.h:706:20: note: in expansion of macro '__same_type' 706 | BUILD_BUG_ON_MSG(!__same_type(*(ptr), ((type *)0)->member) && \ | ^~~~~~~~~~~ kernel/sched/rt.c:121:9: note: in expansion of macro 'container_of' 121 | return container_of(rt_se, struct task_struct, rt); | ^~~~~~~~~~~~ include/linux/compiler_types.h:140:35: error: 'struct task_struct' has no member named 'rt' 140 | #define __compiler_offsetof(a, b) __builtin_offsetof(a, b) | ^~~~~~~~~~~~~~~~~~ include/linux/stddef.h:17:32: note: in expansion of macro '__compiler_offsetof' 17 | #define offsetof(TYPE, MEMBER) __compiler_offsetof(TYPE, MEMBER) | ^~~~~~~~~~~~~~~~~~~ include/linux/kernel.h:709:21: note: in expansion of macro 'offsetof' 709 | ((type *)(__mptr - offsetof(type, member))); }) | ^~~~~~~~ kernel/sched/rt.c:121:9: note: in expansion of macro 'container_of' 121 | return container_of(rt_se, struct task_struct, rt); | ^~~~~~~~~~~~ kernel/sched/rt.c: At top level: kernel/sched/rt.c:671:6: warning: no previous prototype for 'sched_rt_bandwidth_account' [-Wmissing-prototypes] 671 | bool sched_rt_bandwidth_account(struct rt_rq *rt_rq) | ^~~~~~~~~~~~~~~~~~~~~~~~~~ kernel/sched/rt.c: In function 'rt_task_of': kernel/sched/rt.c:122:1: error: control reaches end of non-void function [-Werror=return-type] 122 | } | ^ cc1: some warnings being treated as errors -- In file included from include/linux/sched.h:22, from include/linux/ratelimit.h:6, from include/linux/dev_printk.h:16, from include/linux/device.h:16, from include/linux/node.h:18, from include/linux/cpu.h:17, from include/linux/stop_machine.h:5, from kernel/trace/ftrace.c:17: 41 | int sysctl_latencytop(struct ctl_table *table, int write, void *buffer, | ^~~~~~~~~ kernel/trace/ftrace.c:303:5: warning: no previous prototype for '__register_ftrace_function' [-Wmissing-prototypes] 303 | int __register_ftrace_function(struct ftrace_ops *ops) | ^~~~~~~~~~~~~~~~~~~~~~~~~~ kernel/trace/ftrace.c:346:5: warning: no previous prototype for '__unregister_ftrace_function' [-Wmissing-prototypes] 346 | int __unregister_ftrace_function(struct ftrace_ops *ops) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ kernel/trace/ftrace.c:585:5: warning: no previous prototype for 'ftrace_profile_pages_init' [-Wmissing-prototypes] 585 | int ftrace_profile_pages_init(struct ftrace_profile_stat *stat) | ^~~~~~~~~~~~~~~~~~~~~~~~~ kernel/trace/ftrace.c:3877:15: warning: no previous prototype for 'arch_ftrace_match_adjust' [-Wmissing-prototypes] 3877 | char * __weak arch_ftrace_match_adjust(char *str, const char *search) | ^~~~~~~~~~~~~~~~~~~~~~~~ -- In file included from include/linux/sched.h:22, from include/linux/ratelimit.h:6, from include/linux/dev_printk.h:16, from include/linux/device.h:16, from include/linux/node.h:18, from include/linux/cpu.h:17, from kernel/time/hrtimer.c:25: 41 | int sysctl_latencytop(struct ctl_table *table, int write, void *buffer, | ^~~~~~~~~ kernel/time/hrtimer.c:120:21: warning: initialized field overwritten [-Woverride-init] 120 | [CLOCK_REALTIME] = HRTIMER_BASE_REALTIME, | ^~~~~~~~~~~~~~~~~~~~~ kernel/time/hrtimer.c:120:21: note: (near initialization for 'hrtimer_clock_to_base_table[0]') kernel/time/hrtimer.c:121:22: warning: initialized field overwritten [-Woverride-init] 121 | [CLOCK_MONOTONIC] = HRTIMER_BASE_MONOTONIC, | ^~~~~~~~~~~~~~~~~~~~~~ kernel/time/hrtimer.c:121:22: note: (near initialization for 'hrtimer_clock_to_base_table[1]') kernel/time/hrtimer.c:122:21: warning: initialized field overwritten [-Woverride-init] 122 | [CLOCK_BOOTTIME] = HRTIMER_BASE_BOOTTIME, | ^~~~~~~~~~~~~~~~~~~~~ kernel/time/hrtimer.c:122:21: note: (near initialization for 'hrtimer_clock_to_base_table[7]') kernel/time/hrtimer.c:123:17: warning: initialized field overwritten [-Woverride-init] 123 | [CLOCK_TAI] = HRTIMER_BASE_TAI, | ^~~~~~~~~~~~~~~~ kernel/time/hrtimer.c:123:17: note: (near initialization for 'hrtimer_clock_to_base_table[11]') kernel/time/hrtimer.c: In function '__run_hrtimer': kernel/time/hrtimer.c:1500:7: warning: variable 'expires_in_hardirq' set but not used [-Wunused-but-set-variable] 1500 | bool expires_in_hardirq; | ^~~~~~~~~~~~~~~~~~ -- In file included from include/linux/sched.h:22, from include/linux/ptrace.h:6, from include/uapi/asm-generic/bpf_perf_event.h:4, from ./arch/x86/include/generated/uapi/asm/bpf_perf_event.h:1, from include/uapi/linux/bpf_perf_event.h:11, from kernel/bpf/btf.c:6: 41 | int sysctl_latencytop(struct ctl_table *table, int write, void *buffer, | ^~~~~~~~~ kernel/bpf/btf.c: In function 'btf_seq_show': kernel/bpf/btf.c:5694:22: warning: function 'btf_seq_show' might be a candidate for 'gnu_printf' format attribute [-Wsuggest-attribute=format] 5694 | seq_vprintf((struct seq_file *)show->target, fmt, args); | ^~~~~~~~ kernel/bpf/btf.c: In function 'btf_snprintf_show': kernel/bpf/btf.c:5731:2: warning: function 'btf_snprintf_show' might be a candidate for 'gnu_printf' format attribute [-Wsuggest-attribute=format] 5731 | len = vsnprintf(show->target, ssnprintf->len_left, fmt, args); | ^~~ vim +41 include/linux/latencytop.h 9745512ce79de6 Arjan van de Ven 2008-01-25 40 32927393dc1ccd Christoph Hellwig 2020-04-24 @41 int sysctl_latencytop(struct ctl_table *table, int write, void *buffer, 32927393dc1ccd Christoph Hellwig 2020-04-24 42 size_t *lenp, loff_t *ppos); cb2517653fccaf Mel Gorman 2016-02-05 43 :::::: The code at line 41 was first introduced by commit :::::: 32927393dc1ccd60fb2bdc05b9e8e88753761469 sysctl: pass kernel pointers to ->proc_handler :::::: TO: Christoph Hellwig <hch(a)lst.de&gt; :::::: CC: Al Viro <viro(a)zeniv.linux.org.uk&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org