* lib/sys_info.c:154:3: error: call to undeclared function 'ftrace_dump'; ISO C99 and later do not support implicit function declarations
@ 2026-08-16 13:58 kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2026-08-16 13:58 UTC (permalink / raw)
To: Steven Rostedt; +Cc: llvm, oe-kbuild-all, 0day robot
tree: https://github.com/intel-lab-lkp/linux/commits/Steven-Rostedt/tracing-Move-non-trace_printk-prototypes-back-to-kernel-h/20260814-235157
head: 5803c3be0223106fdafb05968cefd241bf88fef1
commit: 5803c3be0223106fdafb05968cefd241bf88fef1 tracing: Add CONFIG_TRACE_PRINTK_DEBUGGING to clean up kernel.h
date: 2 days ago
config: x86_64-kexec (https://download.01.org/0day-ci/archive/20260816/202608161529.P5YMPr86-lkp@intel.com/config)
compiler: clang version 22.1.8 (https://github.com/llvm/llvm-project ca7933e47d3a3451d81e72ac174dcb5aa28b59d1)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260816/202608161529.P5YMPr86-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/202608161529.P5YMPr86-lkp@intel.com/
All errors (new ones prefixed by >>):
>> lib/sys_info.c:154:3: error: call to undeclared function 'ftrace_dump'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
154 | ftrace_dump(DUMP_ALL);
| ^
lib/sys_info.c:154:3: note: did you mean 'ftrace_bug'?
include/linux/ftrace.h:739:6: note: 'ftrace_bug' declared here
739 | void ftrace_bug(int err, struct dyn_ftrace *rec);
| ^
>> lib/sys_info.c:154:15: error: use of undeclared identifier 'DUMP_ALL'
154 | ftrace_dump(DUMP_ALL);
| ^~~~~~~~
2 errors generated.
--
>> drivers/tty/sysrq.c:331:2: error: call to undeclared function 'ftrace_dump'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
331 | ftrace_dump(DUMP_ALL);
| ^
drivers/tty/sysrq.c:331:2: note: did you mean 'ftrace_bug'?
include/linux/ftrace.h:739:6: note: 'ftrace_bug' declared here
739 | void ftrace_bug(int err, struct dyn_ftrace *rec);
| ^
>> drivers/tty/sysrq.c:331:14: error: use of undeclared identifier 'DUMP_ALL'
331 | ftrace_dump(DUMP_ALL);
| ^~~~~~~~
2 errors generated.
--
In file included from kernel/rcu/tree.c:4951:
>> kernel/rcu/tree_stall.h:238:3: error: call to undeclared function 'ftrace_dump'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
238 | rcu_ftrace_dump(DUMP_ALL);
| ^
kernel/rcu/rcu.h:337:3: note: expanded from macro 'rcu_ftrace_dump'
337 | ftrace_dump(oops_dump_mode); \
| ^
kernel/rcu/tree_stall.h:238:3: note: did you mean 'ftrace_bug'?
kernel/rcu/rcu.h:337:3: note: expanded from macro 'rcu_ftrace_dump'
337 | ftrace_dump(oops_dump_mode); \
| ^
include/linux/ftrace.h:739:6: note: 'ftrace_bug' declared here
739 | void ftrace_bug(int err, struct dyn_ftrace *rec);
| ^
In file included from kernel/rcu/tree.c:4951:
>> kernel/rcu/tree_stall.h:238:19: error: use of undeclared identifier 'DUMP_ALL'
238 | rcu_ftrace_dump(DUMP_ALL);
| ^~~~~~~~
kernel/rcu/tree_stall.h:859:4: error: call to undeclared function 'ftrace_dump'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
859 | rcu_ftrace_dump(DUMP_ALL);
| ^
kernel/rcu/rcu.h:337:3: note: expanded from macro 'rcu_ftrace_dump'
337 | ftrace_dump(oops_dump_mode); \
| ^
In file included from kernel/rcu/tree.c:4951:
kernel/rcu/tree_stall.h:859:20: error: use of undeclared identifier 'DUMP_ALL'
859 | rcu_ftrace_dump(DUMP_ALL);
| ^~~~~~~~
4 errors generated.
vim +/ftrace_dump +154 lib/sys_info.c
d747755917bf8ae Feng Tang 2025-07-03 138
03ef32d665e8a23 Feng Tang 2025-11-13 139 static void __sys_info(unsigned long si_mask)
b76e89e50fc3693 Feng Tang 2025-07-03 140 {
b76e89e50fc3693 Feng Tang 2025-07-03 141 if (si_mask & SYS_INFO_TASKS)
b76e89e50fc3693 Feng Tang 2025-07-03 142 show_state();
b76e89e50fc3693 Feng Tang 2025-07-03 143
b76e89e50fc3693 Feng Tang 2025-07-03 144 if (si_mask & SYS_INFO_MEM)
b76e89e50fc3693 Feng Tang 2025-07-03 145 show_mem();
b76e89e50fc3693 Feng Tang 2025-07-03 146
b76e89e50fc3693 Feng Tang 2025-07-03 147 if (si_mask & SYS_INFO_TIMERS)
b76e89e50fc3693 Feng Tang 2025-07-03 148 sysrq_timer_list_show();
b76e89e50fc3693 Feng Tang 2025-07-03 149
b76e89e50fc3693 Feng Tang 2025-07-03 150 if (si_mask & SYS_INFO_LOCKS)
b76e89e50fc3693 Feng Tang 2025-07-03 151 debug_show_all_locks();
b76e89e50fc3693 Feng Tang 2025-07-03 152
b76e89e50fc3693 Feng Tang 2025-07-03 153 if (si_mask & SYS_INFO_FTRACE)
b76e89e50fc3693 Feng Tang 2025-07-03 @154 ftrace_dump(DUMP_ALL);
b76e89e50fc3693 Feng Tang 2025-07-03 155
760fc597c33d5a7 Andy Shevchenko 2025-10-30 156 if (si_mask & SYS_INFO_ALL_BT)
b76e89e50fc3693 Feng Tang 2025-07-03 157 trigger_all_cpu_backtrace();
b76e89e50fc3693 Feng Tang 2025-07-03 158
b76e89e50fc3693 Feng Tang 2025-07-03 159 if (si_mask & SYS_INFO_BLOCKED_TASKS)
b76e89e50fc3693 Feng Tang 2025-07-03 160 show_state_filter(TASK_UNINTERRUPTIBLE);
b76e89e50fc3693 Feng Tang 2025-07-03 161 }
03ef32d665e8a23 Feng Tang 2025-11-13 162
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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2026-08-16 13:58 lib/sys_info.c:154:3: error: call to undeclared function 'ftrace_dump'; ISO C99 and later do not support implicit function declarations kernel test robot
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