diff options
| author | Steven Rostedt (Google) <rostedt@goodmis.org> | 2024-02-22 16:14:19 -0500 |
|---|---|---|
| committer | Steven Rostedt (Google) <rostedt@goodmis.org> | 2024-03-18 10:33:04 -0400 |
| commit | 70a6ed553f7d3504febac467cb4a0bae621ba3c6 (patch) | |
| tree | 63e10fa3046cd59537fcd2556dc8cedccc869787 /include/linux | |
| parent | 916849860fa9c7d3caeb144cb5dec8831cf23bfc (diff) | |
tracing: Use EVENT_NULL_STR macro instead of open coding "(null)"
The TRACE_EVENT macros has some dependency if a __string() field is NULL,
where it will save "(null)" as the string. This string is also used by
__assign_str(). It's better to create a single macro instead of having
something that will not be caught by the compiler if there is an
unfortunate typo.
Link: https://lore.kernel.org/linux-trace-kernel/20240222211443.106216915@goodmis.org
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Chuck Lever <chuck.lever@oracle.com>
Suggested-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/trace_events.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/trace_events.h b/include/linux/trace_events.h index fc6d0af56bb1..6f9bdfb09d1d 100644 --- a/include/linux/trace_events.h +++ b/include/linux/trace_events.h @@ -17,6 +17,9 @@ struct dentry; struct bpf_prog; union bpf_attr; +/* Used for event string fields when they are NULL */ +#define EVENT_NULL_STR "(null)" + const char *trace_print_flags_seq(struct trace_seq *p, const char *delim, unsigned long flags, const struct trace_print_flags *flag_array); |