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Message-Id: <20250923112526.020cd0768e19558ced4d9f76@kernel.org>
Date: Tue, 23 Sep 2025 11:25:26 +0900
From: Masami Hiramatsu (Google) <mhiramat@...nel.org>
To: kernel test robot <lkp@...el.com>
Cc: Steven Rostedt <rostedt@...dmis.org>, oe-kbuild-all@...ts.linux.dev,
Mark Rutland <mark.rutland@....com>, Mathieu Desnoyers
<mathieu.desnoyers@...icios.com>, linux-kernel@...r.kernel.org,
linux-trace-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/2] tracing: Allow tracer to add more than 32
options
On Tue, 23 Sep 2025 09:47:13 +0800
kernel test robot <lkp@...el.com> wrote:
> Hi Masami,
>
> kernel test robot noticed the following build warnings:
>
> [auto build test WARNING on trace/for-next]
> [also build test WARNING on linus/master v6.17-rc7 next-20250922]
> [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/Masami-Hiramatsu-Google/tracing-Allow-tracer-to-add-more-than-32-options/20250922-204945
> base: https://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace for-next
> patch link: https://lore.kernel.org/r/175854517136.353182.4018685864707176851.stgit%40devnote2
> patch subject: [PATCH v2 1/2] tracing: Allow tracer to add more than 32 options
> config: sh-randconfig-001-20250923 (https://download.01.org/0day-ci/archive/20250923/202509230952.UvKzcDdq-lkp@intel.com/config)
> compiler: sh4-linux-gcc (GCC) 15.1.0
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250923/202509230952.UvKzcDdq-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@...el.com>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202509230952.UvKzcDdq-lkp@intel.com/
>
Hmm, even if it is 'static const', if it is not used, we will get warning.
Maybe
#undef C(a, b)
#define C(a, b) TRACE_ITER_##a |
static const u64 trace_flags_defined =
TRACE_FLAGS 0;
And use this mask in the set_tracer_flag() to check given
bit mask is correct.
Thank you,
> All warnings (new ones prefixed by >>):
>
> In file included from kernel/trace/fgraph.c:20:
> kernel/trace/trace.h:1414:34: warning: 'TRACE_ITER_STACKTRACE' defined but not used [-Wunused-const-variable=]
> 1414 | #define C(a, b) static const u64 TRACE_ITER_##a = (1ULL << TRACE_ITER_##a##_BIT);
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1351:17: note: in expansion of macro 'C'
> 1351 | C(STACKTRACE, "stacktrace")
> | ^
> kernel/trace/trace.h:1393:17: note: in expansion of macro 'STACK_FLAGS'
> 1393 | STACK_FLAGS \
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1416:1: note: in expansion of macro 'TRACE_FLAGS'
> 1416 | TRACE_FLAGS
> | ^~~~~~~~~~~
> >> kernel/trace/trace.h:1414:34: warning: 'TRACE_ITER_DISPLAY_GRAPH' defined but not used [-Wunused-const-variable=]
> 1414 | #define C(a, b) static const u64 TRACE_ITER_##a = (1ULL << TRACE_ITER_##a##_BIT);
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1326:17: note: in expansion of macro 'C'
> 1326 | C(DISPLAY_GRAPH, "display-graph")
> | ^
> kernel/trace/trace.h:1392:17: note: in expansion of macro 'FGRAPH_FLAGS'
> 1392 | FGRAPH_FLAGS \
> | ^~~~~~~~~~~~
> kernel/trace/trace.h:1416:1: note: in expansion of macro 'TRACE_FLAGS'
> 1416 | TRACE_FLAGS
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1414:34: warning: 'TRACE_ITER_FUNC_FORK' defined but not used [-Wunused-const-variable=]
> 1414 | #define C(a, b) static const u64 TRACE_ITER_##a = (1ULL << TRACE_ITER_##a##_BIT);
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1341:17: note: in expansion of macro 'C'
> 1341 | C(FUNC_FORK, "function-fork")
> | ^
> kernel/trace/trace.h:1391:17: note: in expansion of macro 'FUNCTION_FLAGS'
> 1391 | FUNCTION_FLAGS \
> | ^~~~~~~~~~~~~~
> kernel/trace/trace.h:1416:1: note: in expansion of macro 'TRACE_FLAGS'
> 1416 | TRACE_FLAGS
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1414:34: warning: 'TRACE_ITER_FUNCTION' defined but not used [-Wunused-const-variable=]
> 1414 | #define C(a, b) static const u64 TRACE_ITER_##a = (1ULL << TRACE_ITER_##a##_BIT);
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1340:17: note: in expansion of macro 'C'
> 1340 | C(FUNCTION, "function-trace") \
> | ^
> kernel/trace/trace.h:1391:17: note: in expansion of macro 'FUNCTION_FLAGS'
> 1391 | FUNCTION_FLAGS \
> | ^~~~~~~~~~~~~~
> kernel/trace/trace.h:1416:1: note: in expansion of macro 'TRACE_FLAGS'
> 1416 | TRACE_FLAGS
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1414:34: warning: 'TRACE_ITER_HASH_PTR' defined but not used [-Wunused-const-variable=]
> 1414 | #define C(a, b) static const u64 TRACE_ITER_##a = (1ULL << TRACE_ITER_##a##_BIT);
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1390:17: note: in expansion of macro 'C'
> 1390 | C(HASH_PTR, "hash-ptr") /* Print hashed pointer */ \
> | ^
> kernel/trace/trace.h:1416:1: note: in expansion of macro 'TRACE_FLAGS'
> 1416 | TRACE_FLAGS
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1414:34: warning: 'TRACE_ITER_PAUSE_ON_TRACE' defined but not used [-Wunused-const-variable=]
> 1414 | #define C(a, b) static const u64 TRACE_ITER_##a = (1ULL << TRACE_ITER_##a##_BIT);
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1389:17: note: in expansion of macro 'C'
> 1389 | C(PAUSE_ON_TRACE, "pause-on-trace") \
> | ^
> kernel/trace/trace.h:1416:1: note: in expansion of macro 'TRACE_FLAGS'
> 1416 | TRACE_FLAGS
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1414:34: warning: 'TRACE_ITER_COPY_MARKER' defined but not used [-Wunused-const-variable=]
> 1414 | #define C(a, b) static const u64 TRACE_ITER_##a = (1ULL << TRACE_ITER_##a##_BIT);
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1388:17: note: in expansion of macro 'C'
> 1388 | C(COPY_MARKER, "copy_trace_marker")\
> | ^
> kernel/trace/trace.h:1416:1: note: in expansion of macro 'TRACE_FLAGS'
> 1416 | TRACE_FLAGS
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1414:34: warning: 'TRACE_ITER_TRACE_PRINTK' defined but not used [-Wunused-const-variable=]
> 1414 | #define C(a, b) static const u64 TRACE_ITER_##a = (1ULL << TRACE_ITER_##a##_BIT);
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1387:17: note: in expansion of macro 'C'
> 1387 | C(TRACE_PRINTK, "trace_printk_dest") \
> | ^
> kernel/trace/trace.h:1416:1: note: in expansion of macro 'TRACE_FLAGS'
> 1416 | TRACE_FLAGS
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1414:34: warning: 'TRACE_ITER_EVENT_FORK' defined but not used [-Wunused-const-variable=]
> 1414 | #define C(a, b) static const u64 TRACE_ITER_##a = (1ULL << TRACE_ITER_##a##_BIT);
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1386:17: note: in expansion of macro 'C'
> 1386 | C(EVENT_FORK, "event-fork") \
> | ^
> kernel/trace/trace.h:1416:1: note: in expansion of macro 'TRACE_FLAGS'
> 1416 | TRACE_FLAGS
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1414:34: warning: 'TRACE_ITER_MARKERS' defined but not used [-Wunused-const-variable=]
> 1414 | #define C(a, b) static const u64 TRACE_ITER_##a = (1ULL << TRACE_ITER_##a##_BIT);
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1385:17: note: in expansion of macro 'C'
> 1385 | C(MARKERS, "markers") \
> | ^
> kernel/trace/trace.h:1416:1: note: in expansion of macro 'TRACE_FLAGS'
> 1416 | TRACE_FLAGS
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1414:34: warning: 'TRACE_ITER_IRQ_INFO' defined but not used [-Wunused-const-variable=]
> 1414 | #define C(a, b) static const u64 TRACE_ITER_##a = (1ULL << TRACE_ITER_##a##_BIT);
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1384:17: note: in expansion of macro 'C'
> 1384 | C(IRQ_INFO, "irq-info") \
> | ^
> kernel/trace/trace.h:1416:1: note: in expansion of macro 'TRACE_FLAGS'
> 1416 | TRACE_FLAGS
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1414:34: warning: 'TRACE_ITER_STOP_ON_FREE' defined but not used [-Wunused-const-variable=]
> 1414 | #define C(a, b) static const u64 TRACE_ITER_##a = (1ULL << TRACE_ITER_##a##_BIT);
> --
> In file included from kernel/trace/trace.c:58:
> >> kernel/trace/trace.h:1414:34: warning: 'TRACE_ITER_DISPLAY_GRAPH' defined but not used [-Wunused-const-variable=]
> 1414 | #define C(a, b) static const u64 TRACE_ITER_##a = (1ULL << TRACE_ITER_##a##_BIT);
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1326:17: note: in expansion of macro 'C'
> 1326 | C(DISPLAY_GRAPH, "display-graph")
> | ^
> kernel/trace/trace.h:1392:17: note: in expansion of macro 'FGRAPH_FLAGS'
> 1392 | FGRAPH_FLAGS \
> | ^~~~~~~~~~~~
> kernel/trace/trace.h:1416:1: note: in expansion of macro 'TRACE_FLAGS'
> 1416 | TRACE_FLAGS
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1414:34: warning: 'TRACE_ITER_USERSTACKTRACE' defined but not used [-Wunused-const-variable=]
> 1414 | #define C(a, b) static const u64 TRACE_ITER_##a = (1ULL << TRACE_ITER_##a##_BIT);
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1375:17: note: in expansion of macro 'C'
> 1375 | C(USERSTACKTRACE, "userstacktrace") \
> | ^
> kernel/trace/trace.h:1416:1: note: in expansion of macro 'TRACE_FLAGS'
> 1416 | TRACE_FLAGS
> | ^~~~~~~~~~~
> {standard input}: Assembler messages:
> {standard input}:6792: Error: offset to unaligned destination
> {standard input}:24045: Error: offset to unaligned destination
> {standard input}:24422: Error: offset to unaligned destination
> {standard input}:32500: Error: offset to unaligned destination
> --
> In file included from kernel/trace/trace_output.h:6,
> from kernel/trace/trace_events.c:31:
> kernel/trace/trace.h:1414:34: warning: 'TRACE_ITER_STACKTRACE' defined but not used [-Wunused-const-variable=]
> 1414 | #define C(a, b) static const u64 TRACE_ITER_##a = (1ULL << TRACE_ITER_##a##_BIT);
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1351:17: note: in expansion of macro 'C'
> 1351 | C(STACKTRACE, "stacktrace")
> | ^
> kernel/trace/trace.h:1393:17: note: in expansion of macro 'STACK_FLAGS'
> 1393 | STACK_FLAGS \
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1416:1: note: in expansion of macro 'TRACE_FLAGS'
> 1416 | TRACE_FLAGS
> | ^~~~~~~~~~~
> >> kernel/trace/trace.h:1414:34: warning: 'TRACE_ITER_DISPLAY_GRAPH' defined but not used [-Wunused-const-variable=]
> 1414 | #define C(a, b) static const u64 TRACE_ITER_##a = (1ULL << TRACE_ITER_##a##_BIT);
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1326:17: note: in expansion of macro 'C'
> 1326 | C(DISPLAY_GRAPH, "display-graph")
> | ^
> kernel/trace/trace.h:1392:17: note: in expansion of macro 'FGRAPH_FLAGS'
> 1392 | FGRAPH_FLAGS \
> | ^~~~~~~~~~~~
> kernel/trace/trace.h:1416:1: note: in expansion of macro 'TRACE_FLAGS'
> 1416 | TRACE_FLAGS
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1414:34: warning: 'TRACE_ITER_FUNC_FORK' defined but not used [-Wunused-const-variable=]
> 1414 | #define C(a, b) static const u64 TRACE_ITER_##a = (1ULL << TRACE_ITER_##a##_BIT);
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1341:17: note: in expansion of macro 'C'
> 1341 | C(FUNC_FORK, "function-fork")
> | ^
> kernel/trace/trace.h:1391:17: note: in expansion of macro 'FUNCTION_FLAGS'
> 1391 | FUNCTION_FLAGS \
> | ^~~~~~~~~~~~~~
> kernel/trace/trace.h:1416:1: note: in expansion of macro 'TRACE_FLAGS'
> 1416 | TRACE_FLAGS
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1414:34: warning: 'TRACE_ITER_FUNCTION' defined but not used [-Wunused-const-variable=]
> 1414 | #define C(a, b) static const u64 TRACE_ITER_##a = (1ULL << TRACE_ITER_##a##_BIT);
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1340:17: note: in expansion of macro 'C'
> 1340 | C(FUNCTION, "function-trace") \
> | ^
> kernel/trace/trace.h:1391:17: note: in expansion of macro 'FUNCTION_FLAGS'
> 1391 | FUNCTION_FLAGS \
> | ^~~~~~~~~~~~~~
> kernel/trace/trace.h:1416:1: note: in expansion of macro 'TRACE_FLAGS'
> 1416 | TRACE_FLAGS
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1414:34: warning: 'TRACE_ITER_HASH_PTR' defined but not used [-Wunused-const-variable=]
> 1414 | #define C(a, b) static const u64 TRACE_ITER_##a = (1ULL << TRACE_ITER_##a##_BIT);
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1390:17: note: in expansion of macro 'C'
> 1390 | C(HASH_PTR, "hash-ptr") /* Print hashed pointer */ \
> | ^
> kernel/trace/trace.h:1416:1: note: in expansion of macro 'TRACE_FLAGS'
> 1416 | TRACE_FLAGS
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1414:34: warning: 'TRACE_ITER_PAUSE_ON_TRACE' defined but not used [-Wunused-const-variable=]
> 1414 | #define C(a, b) static const u64 TRACE_ITER_##a = (1ULL << TRACE_ITER_##a##_BIT);
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1389:17: note: in expansion of macro 'C'
> 1389 | C(PAUSE_ON_TRACE, "pause-on-trace") \
> | ^
> kernel/trace/trace.h:1416:1: note: in expansion of macro 'TRACE_FLAGS'
> 1416 | TRACE_FLAGS
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1414:34: warning: 'TRACE_ITER_COPY_MARKER' defined but not used [-Wunused-const-variable=]
> 1414 | #define C(a, b) static const u64 TRACE_ITER_##a = (1ULL << TRACE_ITER_##a##_BIT);
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1388:17: note: in expansion of macro 'C'
> 1388 | C(COPY_MARKER, "copy_trace_marker")\
> | ^
> kernel/trace/trace.h:1416:1: note: in expansion of macro 'TRACE_FLAGS'
> 1416 | TRACE_FLAGS
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1414:34: warning: 'TRACE_ITER_TRACE_PRINTK' defined but not used [-Wunused-const-variable=]
> 1414 | #define C(a, b) static const u64 TRACE_ITER_##a = (1ULL << TRACE_ITER_##a##_BIT);
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1387:17: note: in expansion of macro 'C'
> 1387 | C(TRACE_PRINTK, "trace_printk_dest") \
> | ^
> kernel/trace/trace.h:1416:1: note: in expansion of macro 'TRACE_FLAGS'
> 1416 | TRACE_FLAGS
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1414:34: warning: 'TRACE_ITER_EVENT_FORK' defined but not used [-Wunused-const-variable=]
> 1414 | #define C(a, b) static const u64 TRACE_ITER_##a = (1ULL << TRACE_ITER_##a##_BIT);
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1386:17: note: in expansion of macro 'C'
> 1386 | C(EVENT_FORK, "event-fork") \
> | ^
> kernel/trace/trace.h:1416:1: note: in expansion of macro 'TRACE_FLAGS'
> 1416 | TRACE_FLAGS
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1414:34: warning: 'TRACE_ITER_MARKERS' defined but not used [-Wunused-const-variable=]
> 1414 | #define C(a, b) static const u64 TRACE_ITER_##a = (1ULL << TRACE_ITER_##a##_BIT);
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1385:17: note: in expansion of macro 'C'
> 1385 | C(MARKERS, "markers") \
> | ^
> kernel/trace/trace.h:1416:1: note: in expansion of macro 'TRACE_FLAGS'
> 1416 | TRACE_FLAGS
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1414:34: warning: 'TRACE_ITER_IRQ_INFO' defined but not used [-Wunused-const-variable=]
> 1414 | #define C(a, b) static const u64 TRACE_ITER_##a = (1ULL << TRACE_ITER_##a##_BIT);
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1384:17: note: in expansion of macro 'C'
> 1384 | C(IRQ_INFO, "irq-info") \
> | ^
> kernel/trace/trace.h:1416:1: note: in expansion of macro 'TRACE_FLAGS'
> 1416 | TRACE_FLAGS
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1414:34: warning: 'TRACE_ITER_STOP_ON_FREE' defined but not used [-Wunused-const-variable=]
> 1414 | #define C(a, b) static const u64 TRACE_ITER_##a = (1ULL << TRACE_ITER_##a##_BIT);
> --
> In file included from kernel/trace/ring_buffer.c:36:
> kernel/trace/trace.h:1414:34: warning: 'TRACE_ITER_STACKTRACE' defined but not used [-Wunused-const-variable=]
> 1414 | #define C(a, b) static const u64 TRACE_ITER_##a = (1ULL << TRACE_ITER_##a##_BIT);
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1351:17: note: in expansion of macro 'C'
> 1351 | C(STACKTRACE, "stacktrace")
> | ^
> kernel/trace/trace.h:1393:17: note: in expansion of macro 'STACK_FLAGS'
> 1393 | STACK_FLAGS \
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1416:1: note: in expansion of macro 'TRACE_FLAGS'
> 1416 | TRACE_FLAGS
> | ^~~~~~~~~~~
> >> kernel/trace/trace.h:1414:34: warning: 'TRACE_ITER_DISPLAY_GRAPH' defined but not used [-Wunused-const-variable=]
> 1414 | #define C(a, b) static const u64 TRACE_ITER_##a = (1ULL << TRACE_ITER_##a##_BIT);
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1326:17: note: in expansion of macro 'C'
> 1326 | C(DISPLAY_GRAPH, "display-graph")
> | ^
> kernel/trace/trace.h:1392:17: note: in expansion of macro 'FGRAPH_FLAGS'
> 1392 | FGRAPH_FLAGS \
> | ^~~~~~~~~~~~
> kernel/trace/trace.h:1416:1: note: in expansion of macro 'TRACE_FLAGS'
> 1416 | TRACE_FLAGS
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1414:34: warning: 'TRACE_ITER_FUNC_FORK' defined but not used [-Wunused-const-variable=]
> 1414 | #define C(a, b) static const u64 TRACE_ITER_##a = (1ULL << TRACE_ITER_##a##_BIT);
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1341:17: note: in expansion of macro 'C'
> 1341 | C(FUNC_FORK, "function-fork")
> | ^
> kernel/trace/trace.h:1391:17: note: in expansion of macro 'FUNCTION_FLAGS'
> 1391 | FUNCTION_FLAGS \
> | ^~~~~~~~~~~~~~
> kernel/trace/trace.h:1416:1: note: in expansion of macro 'TRACE_FLAGS'
> 1416 | TRACE_FLAGS
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1414:34: warning: 'TRACE_ITER_FUNCTION' defined but not used [-Wunused-const-variable=]
> 1414 | #define C(a, b) static const u64 TRACE_ITER_##a = (1ULL << TRACE_ITER_##a##_BIT);
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1340:17: note: in expansion of macro 'C'
> 1340 | C(FUNCTION, "function-trace") \
> | ^
> kernel/trace/trace.h:1391:17: note: in expansion of macro 'FUNCTION_FLAGS'
> 1391 | FUNCTION_FLAGS \
> | ^~~~~~~~~~~~~~
> kernel/trace/trace.h:1416:1: note: in expansion of macro 'TRACE_FLAGS'
> 1416 | TRACE_FLAGS
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1414:34: warning: 'TRACE_ITER_HASH_PTR' defined but not used [-Wunused-const-variable=]
> 1414 | #define C(a, b) static const u64 TRACE_ITER_##a = (1ULL << TRACE_ITER_##a##_BIT);
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1390:17: note: in expansion of macro 'C'
> 1390 | C(HASH_PTR, "hash-ptr") /* Print hashed pointer */ \
> | ^
> kernel/trace/trace.h:1416:1: note: in expansion of macro 'TRACE_FLAGS'
> 1416 | TRACE_FLAGS
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1414:34: warning: 'TRACE_ITER_PAUSE_ON_TRACE' defined but not used [-Wunused-const-variable=]
> 1414 | #define C(a, b) static const u64 TRACE_ITER_##a = (1ULL << TRACE_ITER_##a##_BIT);
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1389:17: note: in expansion of macro 'C'
> 1389 | C(PAUSE_ON_TRACE, "pause-on-trace") \
> | ^
> kernel/trace/trace.h:1416:1: note: in expansion of macro 'TRACE_FLAGS'
> 1416 | TRACE_FLAGS
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1414:34: warning: 'TRACE_ITER_COPY_MARKER' defined but not used [-Wunused-const-variable=]
> 1414 | #define C(a, b) static const u64 TRACE_ITER_##a = (1ULL << TRACE_ITER_##a##_BIT);
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1388:17: note: in expansion of macro 'C'
> 1388 | C(COPY_MARKER, "copy_trace_marker")\
> | ^
> kernel/trace/trace.h:1416:1: note: in expansion of macro 'TRACE_FLAGS'
> 1416 | TRACE_FLAGS
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1414:34: warning: 'TRACE_ITER_TRACE_PRINTK' defined but not used [-Wunused-const-variable=]
> 1414 | #define C(a, b) static const u64 TRACE_ITER_##a = (1ULL << TRACE_ITER_##a##_BIT);
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1387:17: note: in expansion of macro 'C'
> 1387 | C(TRACE_PRINTK, "trace_printk_dest") \
> | ^
> kernel/trace/trace.h:1416:1: note: in expansion of macro 'TRACE_FLAGS'
> 1416 | TRACE_FLAGS
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1414:34: warning: 'TRACE_ITER_EVENT_FORK' defined but not used [-Wunused-const-variable=]
> 1414 | #define C(a, b) static const u64 TRACE_ITER_##a = (1ULL << TRACE_ITER_##a##_BIT);
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1386:17: note: in expansion of macro 'C'
> 1386 | C(EVENT_FORK, "event-fork") \
> | ^
> kernel/trace/trace.h:1416:1: note: in expansion of macro 'TRACE_FLAGS'
> 1416 | TRACE_FLAGS
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1414:34: warning: 'TRACE_ITER_MARKERS' defined but not used [-Wunused-const-variable=]
> 1414 | #define C(a, b) static const u64 TRACE_ITER_##a = (1ULL << TRACE_ITER_##a##_BIT);
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1385:17: note: in expansion of macro 'C'
> 1385 | C(MARKERS, "markers") \
> | ^
> kernel/trace/trace.h:1416:1: note: in expansion of macro 'TRACE_FLAGS'
> 1416 | TRACE_FLAGS
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1414:34: warning: 'TRACE_ITER_IRQ_INFO' defined but not used [-Wunused-const-variable=]
> 1414 | #define C(a, b) static const u64 TRACE_ITER_##a = (1ULL << TRACE_ITER_##a##_BIT);
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1384:17: note: in expansion of macro 'C'
> 1384 | C(IRQ_INFO, "irq-info") \
> | ^
> kernel/trace/trace.h:1416:1: note: in expansion of macro 'TRACE_FLAGS'
> 1416 | TRACE_FLAGS
> | ^~~~~~~~~~~
> kernel/trace/trace.h:1414:34: warning: 'TRACE_ITER_STOP_ON_FREE' defined but not used [-Wunused-const-variable=]
> 1414 | #define C(a, b) static const u64 TRACE_ITER_##a = (1ULL << TRACE_ITER_##a##_BIT);
> ..
>
>
> vim +/TRACE_ITER_DISPLAY_GRAPH +1414 kernel/trace/trace.h
>
> 1348
> 1349 #ifdef CONFIG_STACKTRACE
> 1350 # define STACK_FLAGS \
> > 1351 C(STACKTRACE, "stacktrace")
> 1352 #else
> 1353 # define STACK_FLAGS
> 1354 #endif
> 1355
> 1356 /*
> 1357 * trace_iterator_flags is an enumeration that defines bit
> 1358 * positions into trace_flags that controls the output.
> 1359 *
> 1360 * NOTE: These bits must match the trace_options array in
> 1361 * trace.c (this macro guarantees it).
> 1362 */
> 1363 #define TRACE_FLAGS \
> 1364 C(PRINT_PARENT, "print-parent") \
> 1365 C(SYM_OFFSET, "sym-offset") \
> 1366 C(SYM_ADDR, "sym-addr") \
> 1367 C(VERBOSE, "verbose") \
> 1368 C(RAW, "raw") \
> 1369 C(HEX, "hex") \
> 1370 C(BIN, "bin") \
> 1371 C(BLOCK, "block") \
> 1372 C(FIELDS, "fields") \
> 1373 C(PRINTK, "trace_printk") \
> 1374 C(ANNOTATE, "annotate") \
> 1375 C(USERSTACKTRACE, "userstacktrace") \
> 1376 C(SYM_USEROBJ, "sym-userobj") \
> 1377 C(PRINTK_MSGONLY, "printk-msg-only") \
> 1378 C(CONTEXT_INFO, "context-info") /* Print pid/cpu/time */ \
> 1379 C(LATENCY_FMT, "latency-format") \
> 1380 C(RECORD_CMD, "record-cmd") \
> 1381 C(RECORD_TGID, "record-tgid") \
> 1382 C(OVERWRITE, "overwrite") \
> 1383 C(STOP_ON_FREE, "disable_on_free") \
> 1384 C(IRQ_INFO, "irq-info") \
> 1385 C(MARKERS, "markers") \
> 1386 C(EVENT_FORK, "event-fork") \
> 1387 C(TRACE_PRINTK, "trace_printk_dest") \
> 1388 C(COPY_MARKER, "copy_trace_marker")\
> 1389 C(PAUSE_ON_TRACE, "pause-on-trace") \
> 1390 C(HASH_PTR, "hash-ptr") /* Print hashed pointer */ \
> 1391 FUNCTION_FLAGS \
> 1392 FGRAPH_FLAGS \
> 1393 STACK_FLAGS \
> 1394 BRANCH_FLAGS
> 1395
> 1396 /*
> 1397 * By defining C, we can make TRACE_FLAGS a list of bit names
> 1398 * that will define the bits for the flag masks.
> 1399 */
> 1400 #undef C
> 1401 #define C(a, b) TRACE_ITER_##a##_BIT,
> 1402
> 1403 enum trace_iterator_bits {
> 1404 TRACE_FLAGS
> 1405 /* Make sure we don't go more than we have bits for */
> 1406 TRACE_ITER_LAST_BIT
> 1407 };
> 1408
> 1409 /*
> 1410 * By redefining C, we can make TRACE_FLAGS a list of masks that
> 1411 * use the bits as defined above.
> 1412 */
> 1413 #undef C
> > 1414 #define C(a, b) static const u64 TRACE_ITER_##a = (1ULL << TRACE_ITER_##a##_BIT);
> 1415
>
> --
> 0-DAY CI Kernel Test Service
> https://github.com/intel/lkp-tests/wiki
--
Masami Hiramatsu (Google) <mhiramat@...nel.org>
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