* Re: [PATCH v5] function_graph: Enable funcgraph-args and funcgraph-retaddr to work simultaneously
[not found] <20251113072938.333657-1-dolinux.peng@gmail.com>
@ 2025-11-13 17:41 ` kernel test robot
2025-11-13 18:33 ` kernel test robot
1 sibling, 0 replies; 2+ messages in thread
From: kernel test robot @ 2025-11-13 17:41 UTC (permalink / raw)
To: Donglin Peng, rostedt
Cc: llvm, oe-kbuild-all, linux-trace-kernel, linux-kernel,
Donglin Peng, Sven Schnelle, Masami Hiramatsu
Hi Donglin,
kernel test robot noticed the following build warnings:
[auto build test WARNING on v6.18-rc5]
[also build test WARNING on linus/master]
[cannot apply to trace/for-next next-20251113]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Donglin-Peng/function_graph-Enable-funcgraph-args-and-funcgraph-retaddr-to-work-simultaneously/20251113-153332
base: v6.18-rc5
patch link: https://lore.kernel.org/r/20251113072938.333657-1-dolinux.peng%40gmail.com
patch subject: [PATCH v5] function_graph: Enable funcgraph-args and funcgraph-retaddr to work simultaneously
config: x86_64-kexec (https://download.01.org/0day-ci/archive/20251114/202511140111.X1AImPQE-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251114/202511140111.X1AImPQE-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/202511140111.X1AImPQE-lkp@intel.com/
All warnings (new ones prefixed by >>):
>> kernel/trace/trace_functions_graph.c:169:20: warning: variable 'retaddr' is uninitialized when used here [-Wuninitialized]
169 | entry->args[0] = retaddr;
| ^~~~~~~
kernel/trace/trace_functions_graph.c:143:23: note: initialize the variable 'retaddr' to silence this warning
143 | unsigned long retaddr;
| ^
| = 0
1 warning generated.
vim +/retaddr +169 kernel/trace/trace_functions_graph.c
132
133 static void
134 print_graph_duration(struct trace_array *tr, unsigned long long duration,
135 struct trace_seq *s, u32 flags);
136
137 static int __graph_entry(struct trace_array *tr, struct ftrace_graph_ent *trace,
138 unsigned int trace_ctx, struct ftrace_regs *fregs)
139 {
140 struct ring_buffer_event *event;
141 struct trace_buffer *buffer = tr->array_buffer.buffer;
142 struct ftrace_graph_ent_entry *entry;
143 unsigned long retaddr;
144 int size = sizeof(*entry);
145 int type = TRACE_GRAPH_ENT;
146 int nr_args = 0, args_offs = 0;
147
148 if (IS_ENABLED(CONFIG_FUNCTION_GRAPH_RETADDR) &&
149 tracer_flags_is_set(TRACE_GRAPH_PRINT_RETADDR)) {
150 retaddr = ftrace_graph_top_ret_addr(current);
151 type = TRACE_GRAPH_RETADDR_ENT;
152 nr_args += 1;
153 }
154
155 /* If fregs is defined, add FTRACE_REGS_MAX_ARGS long size words */
156 if (!!fregs)
157 nr_args += FTRACE_REGS_MAX_ARGS;
158
159 size += nr_args * sizeof(long);
160 event = trace_buffer_lock_reserve(buffer, type, size, trace_ctx);
161 if (!event)
162 return 0;
163
164 entry = ring_buffer_event_data(event);
165 entry->graph_ent = *trace;
166
167 /* Store the retaddr in args[0] */
168 if (type == TRACE_GRAPH_RETADDR_ENT) {
> 169 entry->args[0] = retaddr;
170 args_offs += 1;
171 }
172
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [PATCH v5] function_graph: Enable funcgraph-args and funcgraph-retaddr to work simultaneously
[not found] <20251113072938.333657-1-dolinux.peng@gmail.com>
2025-11-13 17:41 ` [PATCH v5] function_graph: Enable funcgraph-args and funcgraph-retaddr to work simultaneously kernel test robot
@ 2025-11-13 18:33 ` kernel test robot
1 sibling, 0 replies; 2+ messages in thread
From: kernel test robot @ 2025-11-13 18:33 UTC (permalink / raw)
To: Donglin Peng, rostedt
Cc: llvm, oe-kbuild-all, linux-trace-kernel, linux-kernel,
Donglin Peng, Sven Schnelle, Masami Hiramatsu
Hi Donglin,
kernel test robot noticed the following build warnings:
[auto build test WARNING on v6.18-rc5]
[also build test WARNING on linus/master]
[cannot apply to trace/for-next next-20251113]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Donglin-Peng/function_graph-Enable-funcgraph-args-and-funcgraph-retaddr-to-work-simultaneously/20251113-153332
base: v6.18-rc5
patch link: https://lore.kernel.org/r/20251113072938.333657-1-dolinux.peng%40gmail.com
patch subject: [PATCH v5] function_graph: Enable funcgraph-args and funcgraph-retaddr to work simultaneously
config: sparc64-randconfig-001-20251113 (https://download.01.org/0day-ci/archive/20251114/202511140224.loIXI9Us-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251114/202511140224.loIXI9Us-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/202511140224.loIXI9Us-lkp@intel.com/
All warnings (new ones prefixed by >>):
>> kernel/trace/trace_functions_graph.c:146:19: warning: variable 'args_offs' set but not used [-Wunused-but-set-variable]
146 | int nr_args = 0, args_offs = 0;
| ^
kernel/trace/trace_functions_graph.c:169:20: warning: variable 'retaddr' is uninitialized when used here [-Wuninitialized]
169 | entry->args[0] = retaddr;
| ^~~~~~~
kernel/trace/trace_functions_graph.c:143:23: note: initialize the variable 'retaddr' to silence this warning
143 | unsigned long retaddr;
| ^
| = 0
2 warnings generated.
vim +/args_offs +146 kernel/trace/trace_functions_graph.c
132
133 static void
134 print_graph_duration(struct trace_array *tr, unsigned long long duration,
135 struct trace_seq *s, u32 flags);
136
137 static int __graph_entry(struct trace_array *tr, struct ftrace_graph_ent *trace,
138 unsigned int trace_ctx, struct ftrace_regs *fregs)
139 {
140 struct ring_buffer_event *event;
141 struct trace_buffer *buffer = tr->array_buffer.buffer;
142 struct ftrace_graph_ent_entry *entry;
143 unsigned long retaddr;
144 int size = sizeof(*entry);
145 int type = TRACE_GRAPH_ENT;
> 146 int nr_args = 0, args_offs = 0;
147
148 if (IS_ENABLED(CONFIG_FUNCTION_GRAPH_RETADDR) &&
149 tracer_flags_is_set(TRACE_GRAPH_PRINT_RETADDR)) {
150 retaddr = ftrace_graph_top_ret_addr(current);
151 type = TRACE_GRAPH_RETADDR_ENT;
152 nr_args += 1;
153 }
154
155 /* If fregs is defined, add FTRACE_REGS_MAX_ARGS long size words */
156 if (!!fregs)
157 nr_args += FTRACE_REGS_MAX_ARGS;
158
159 size += nr_args * sizeof(long);
160 event = trace_buffer_lock_reserve(buffer, type, size, trace_ctx);
161 if (!event)
162 return 0;
163
164 entry = ring_buffer_event_data(event);
165 entry->graph_ent = *trace;
166
167 /* Store the retaddr in args[0] */
168 if (type == TRACE_GRAPH_RETADDR_ENT) {
169 entry->args[0] = retaddr;
170 args_offs += 1;
171 }
172
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
^ permalink raw reply [flat|nested] 2+ messages in thread
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[not found] <20251113072938.333657-1-dolinux.peng@gmail.com>
2025-11-13 17:41 ` [PATCH v5] function_graph: Enable funcgraph-args and funcgraph-retaddr to work simultaneously kernel test robot
2025-11-13 18:33 ` kernel test robot
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