From: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Since enum trace_iterator_flags is 32bit, the max number of the
option flags is limited to 32 and it is fully used now. To add
a new option, we need to expand it.
This replaces trace_iterator_flags with just a list of `static
const u64` so that we can add another 32 new options. Now all
option masks are u64 instead of u32 or unsigned int.
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
---
kernel/trace/trace.c | 19 +++++----
kernel/trace/trace.h | 81 +++++++++++++++++++------------------
kernel/trace/trace_irqsoff.c | 2 -
kernel/trace/trace_sched_wakeup.c | 2 -
4 files changed, 53 insertions(+), 51 deletions(-)
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 4283ed4e8f59..114098f7b06f 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -1736,7 +1736,7 @@ unsigned long nsecs_to_usecs(unsigned long nsecs)
* of strings in the order that the evals (enum) were defined.
*/
#undef C
-#define C(a, b) b
+#define C(a, b) b,
/* These must match the bit positions in trace_iterator_flags */
static const char *trace_options[] = {
@@ -5144,7 +5144,7 @@ static int tracing_trace_options_show(struct seq_file *m, void *v)
trace_opts = tr->current_trace->flags->opts;
for (i = 0; trace_options[i]; i++) {
- if (tr->trace_flags & (1 << i))
+ if (tr->trace_flags & (1ULL << i))
seq_printf(m, "%s\n", trace_options[i]);
else
seq_printf(m, "no%s\n", trace_options[i]);
@@ -5197,7 +5197,7 @@ static int set_tracer_option(struct trace_array *tr, char *cmp, int neg)
}
/* Some tracers require overwrite to stay enabled */
-int trace_keep_overwrite(struct tracer *tracer, u32 mask, int set)
+int trace_keep_overwrite(struct tracer *tracer, u64 mask, int set)
{
if (tracer->enabled && (mask & TRACE_ITER_OVERWRITE) && !set)
return -1;
@@ -5205,7 +5205,7 @@ int trace_keep_overwrite(struct tracer *tracer, u32 mask, int set)
return 0;
}
-int set_tracer_flag(struct trace_array *tr, unsigned int mask, int enabled)
+int set_tracer_flag(struct trace_array *tr, u64 mask, int enabled)
{
if ((mask == TRACE_ITER_RECORD_TGID) ||
(mask == TRACE_ITER_RECORD_CMD) ||
@@ -5307,7 +5307,7 @@ int trace_set_options(struct trace_array *tr, char *option)
if (ret < 0)
ret = set_tracer_option(tr, cmp, neg);
else
- ret = set_tracer_flag(tr, 1 << ret, !neg);
+ ret = set_tracer_flag(tr, 1ULL << ret, !neg);
mutex_unlock(&trace_types_lock);
mutex_unlock(&event_mutex);
@@ -9119,7 +9119,7 @@ trace_options_core_read(struct file *filp, char __user *ubuf, size_t cnt,
get_tr_index(tr_index, &tr, &index);
- if (tr->trace_flags & (1 << index))
+ if (tr->trace_flags & (1ULL << index))
buf = "1\n";
else
buf = "0\n";
@@ -9148,7 +9148,7 @@ trace_options_core_write(struct file *filp, const char __user *ubuf, size_t cnt,
mutex_lock(&event_mutex);
mutex_lock(&trace_types_lock);
- ret = set_tracer_flag(tr, 1 << index, val);
+ ret = set_tracer_flag(tr, 1ULL << index, val);
mutex_unlock(&trace_types_lock);
mutex_unlock(&event_mutex);
@@ -9312,8 +9312,9 @@ static void create_trace_options_dir(struct trace_array *tr)
for (i = 0; trace_options[i]; i++) {
if (top_level ||
- !((1 << i) & TOP_LEVEL_TRACE_FLAGS))
+ !((1ULL << i) & TOP_LEVEL_TRACE_FLAGS)) {
create_trace_option_core_file(tr, trace_options[i], i);
+ }
}
}
@@ -9997,7 +9998,7 @@ static int __remove_instance(struct trace_array *tr)
/* Disable all the flags that were enabled coming in */
for (i = 0; i < TRACE_FLAGS_MAX_SIZE; i++) {
if ((1 << i) & ZEROED_TRACE_FLAGS)
- set_tracer_flag(tr, 1 << i, 0);
+ set_tracer_flag(tr, 1ULL << i, 0);
}
if (printk_trace == tr)
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 1dbf1d3cf2f1..c2a41c2cafe5 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -216,7 +216,7 @@ struct array_buffer {
int cpu;
};
-#define TRACE_FLAGS_MAX_SIZE 32
+#define TRACE_FLAGS_MAX_SIZE 64
struct trace_options {
struct tracer *tracer;
@@ -390,7 +390,7 @@ struct trace_array {
int buffer_percent;
unsigned int n_err_log_entries;
struct tracer *current_trace;
- unsigned int trace_flags;
+ u64 trace_flags;
unsigned char trace_flags_index[TRACE_FLAGS_MAX_SIZE];
unsigned int flags;
raw_spinlock_t start_lock;
@@ -631,7 +631,7 @@ struct tracer {
u32 old_flags, u32 bit, int set);
/* Return 0 if OK with change, else return non-zero */
int (*flag_changed)(struct trace_array *tr,
- u32 mask, int set);
+ u64 mask, int set);
struct tracer *next;
struct tracer_flags *flags;
int enabled;
@@ -1323,22 +1323,22 @@ extern int trace_get_user(struct trace_parser *parser, const char __user *ubuf,
*/
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
# define FGRAPH_FLAGS \
- C(DISPLAY_GRAPH, "display-graph"),
+ C(DISPLAY_GRAPH, "display-graph")
#else
# define FGRAPH_FLAGS
#endif
#ifdef CONFIG_BRANCH_TRACER
# define BRANCH_FLAGS \
- C(BRANCH, "branch"),
+ C(BRANCH, "branch")
#else
# define BRANCH_FLAGS
#endif
#ifdef CONFIG_FUNCTION_TRACER
# define FUNCTION_FLAGS \
- C(FUNCTION, "function-trace"), \
- C(FUNC_FORK, "function-fork"),
+ C(FUNCTION, "function-trace") \
+ C(FUNC_FORK, "function-fork")
# define FUNCTION_DEFAULT_FLAGS TRACE_ITER_FUNCTION
#else
# define FUNCTION_FLAGS
@@ -1348,7 +1348,7 @@ extern int trace_get_user(struct trace_parser *parser, const char __user *ubuf,
#ifdef CONFIG_STACKTRACE
# define STACK_FLAGS \
- C(STACKTRACE, "stacktrace"),
+ C(STACKTRACE, "stacktrace")
#else
# define STACK_FLAGS
#endif
@@ -1361,33 +1361,33 @@ extern int trace_get_user(struct trace_parser *parser, const char __user *ubuf,
* trace.c (this macro guarantees it).
*/
#define TRACE_FLAGS \
- C(PRINT_PARENT, "print-parent"), \
- C(SYM_OFFSET, "sym-offset"), \
- C(SYM_ADDR, "sym-addr"), \
- C(VERBOSE, "verbose"), \
- C(RAW, "raw"), \
- C(HEX, "hex"), \
- C(BIN, "bin"), \
- C(BLOCK, "block"), \
- C(FIELDS, "fields"), \
- C(PRINTK, "trace_printk"), \
- C(ANNOTATE, "annotate"), \
- C(USERSTACKTRACE, "userstacktrace"), \
- C(SYM_USEROBJ, "sym-userobj"), \
- C(PRINTK_MSGONLY, "printk-msg-only"), \
- C(CONTEXT_INFO, "context-info"), /* Print pid/cpu/time */ \
- C(LATENCY_FMT, "latency-format"), \
- C(RECORD_CMD, "record-cmd"), \
- C(RECORD_TGID, "record-tgid"), \
- C(OVERWRITE, "overwrite"), \
- C(STOP_ON_FREE, "disable_on_free"), \
- C(IRQ_INFO, "irq-info"), \
- C(MARKERS, "markers"), \
- C(EVENT_FORK, "event-fork"), \
- C(TRACE_PRINTK, "trace_printk_dest"), \
- C(COPY_MARKER, "copy_trace_marker"),\
- C(PAUSE_ON_TRACE, "pause-on-trace"), \
- C(HASH_PTR, "hash-ptr"), /* Print hashed pointer */ \
+ C(PRINT_PARENT, "print-parent") \
+ C(SYM_OFFSET, "sym-offset") \
+ C(SYM_ADDR, "sym-addr") \
+ C(VERBOSE, "verbose") \
+ C(RAW, "raw") \
+ C(HEX, "hex") \
+ C(BIN, "bin") \
+ C(BLOCK, "block") \
+ C(FIELDS, "fields") \
+ C(PRINTK, "trace_printk") \
+ C(ANNOTATE, "annotate") \
+ C(USERSTACKTRACE, "userstacktrace") \
+ C(SYM_USEROBJ, "sym-userobj") \
+ C(PRINTK_MSGONLY, "printk-msg-only") \
+ C(CONTEXT_INFO, "context-info") /* Print pid/cpu/time */ \
+ C(LATENCY_FMT, "latency-format") \
+ C(RECORD_CMD, "record-cmd") \
+ C(RECORD_TGID, "record-tgid") \
+ C(OVERWRITE, "overwrite") \
+ C(STOP_ON_FREE, "disable_on_free") \
+ C(IRQ_INFO, "irq-info") \
+ C(MARKERS, "markers") \
+ C(EVENT_FORK, "event-fork") \
+ C(TRACE_PRINTK, "trace_printk_dest") \
+ C(COPY_MARKER, "copy_trace_marker")\
+ C(PAUSE_ON_TRACE, "pause-on-trace") \
+ C(HASH_PTR, "hash-ptr") /* Print hashed pointer */ \
FUNCTION_FLAGS \
FGRAPH_FLAGS \
STACK_FLAGS \
@@ -1398,7 +1398,7 @@ extern int trace_get_user(struct trace_parser *parser, const char __user *ubuf,
* that will define the bits for the flag masks.
*/
#undef C
-#define C(a, b) TRACE_ITER_##a##_BIT
+#define C(a, b) TRACE_ITER_##a##_BIT,
enum trace_iterator_bits {
TRACE_FLAGS
@@ -1411,9 +1411,10 @@ enum trace_iterator_bits {
* use the bits as defined above.
*/
#undef C
-#define C(a, b) TRACE_ITER_##a = (1 << TRACE_ITER_##a##_BIT)
+#define C(a, b) static const u64 TRACE_ITER_##a = (1ULL << TRACE_ITER_##a##_BIT);
-enum trace_iterator_flags { TRACE_FLAGS };
+TRACE_FLAGS
+#undef C
/*
* TRACE_ITER_SYM_MASK masks the options in trace_flags that
@@ -2058,8 +2059,8 @@ extern const char *__stop___tracepoint_str[];
void trace_printk_control(bool enabled);
void trace_printk_start_comm(void);
-int trace_keep_overwrite(struct tracer *tracer, u32 mask, int set);
-int set_tracer_flag(struct trace_array *tr, unsigned int mask, int enabled);
+int trace_keep_overwrite(struct tracer *tracer, u64 mask, int set);
+int set_tracer_flag(struct trace_array *tr, u64 mask, int enabled);
/* Used from boot time tracer */
extern int trace_set_options(struct trace_array *tr, char *option);
diff --git a/kernel/trace/trace_irqsoff.c b/kernel/trace/trace_irqsoff.c
index 5496758b6c76..1a65f9f1075c 100644
--- a/kernel/trace/trace_irqsoff.c
+++ b/kernel/trace/trace_irqsoff.c
@@ -539,7 +539,7 @@ static inline int irqsoff_function_set(struct trace_array *tr, u32 mask, int set
}
#endif /* CONFIG_FUNCTION_TRACER */
-static int irqsoff_flag_changed(struct trace_array *tr, u32 mask, int set)
+static int irqsoff_flag_changed(struct trace_array *tr, u64 mask, int set)
{
struct tracer *tracer = tr->current_trace;
diff --git a/kernel/trace/trace_sched_wakeup.c b/kernel/trace/trace_sched_wakeup.c
index bf1cb80742ae..45865b4f753f 100644
--- a/kernel/trace/trace_sched_wakeup.c
+++ b/kernel/trace/trace_sched_wakeup.c
@@ -328,7 +328,7 @@ __trace_function(struct trace_array *tr,
trace_function(tr, ip, parent_ip, trace_ctx, NULL);
}
-static int wakeup_flag_changed(struct trace_array *tr, u32 mask, int set)
+static int wakeup_flag_changed(struct trace_array *tr, u64 mask, int set)
{
struct tracer *tracer = tr->current_trace;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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202509230952.UvKzcDdq-lkp@intel.com/
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
On Tue, 23 Sep 2025 09:47:13 +0800
kernel test robot <lkp@intel.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@intel.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@kernel.org>
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