[for-next][PATCH 19/24] tracing: Add LATENCY_FS_NOTIFY to define if latency_fsnotify() is defined

From: Steven Rostedt
Date: Sat Jun 26 2021 - 09:06:30 EST


From: "Steven Rostedt (VMware)" <rostedt@xxxxxxxxxxx>

With the coming addition of the osnoise tracer, the configs needed to
include the latency_fsnotify() has become more complex, and to keep the
declaration in the header file the same as in the C file, just have the
logic needed to define it in one place, and that defines LATENCY_FS_NOTIFY
which will be used in the C code.

Reported-by: kernel test robot <lkp@xxxxxxxxx>
Signed-off-by: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx>
---
kernel/trace/trace.c | 3 +--
kernel/trace/trace.h | 6 +++---
2 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 27bf203ef05a..60492464281e 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -1690,8 +1690,7 @@ static ssize_t trace_seq_to_buffer(struct trace_seq *s, void *buf, size_t cnt)
unsigned long __read_mostly tracing_thresh;
static const struct file_operations tracing_max_lat_fops;

-#if (defined(CONFIG_TRACER_MAX_TRACE) || defined(CONFIG_HWLAT_TRACER)) && \
- defined(CONFIG_FSNOTIFY)
+#ifdef LATENCY_FS_NOTIFY

static struct workqueue_struct *fsnotify_wq;

diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 22f8c652ef8b..87588d1e24ca 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -677,13 +677,13 @@ void update_max_tr_single(struct trace_array *tr,

#if (defined(CONFIG_TRACER_MAX_TRACE) || defined(CONFIG_HWLAT_TRACER)) && \
defined(CONFIG_FSNOTIFY)
+#define LATENCY_FS_NOTIFY
+#endif

+#ifdef LATENCY_FS_NOTIFY
void latency_fsnotify(struct trace_array *tr);
-
#else
-
static inline void latency_fsnotify(struct trace_array *tr) { }
-
#endif

#ifdef CONFIG_STACKTRACE
--
2.30.2