linux-kernel - [for-next][PATCH 19/24] tracing: Add LATENCY_FS_NOTIFY to define if latency

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Message-ID: <20210626130538.003082428@goodmis.org>
Date:   Sat, 26 Jun 2021 09:04:23 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     linux-kernel@...r.kernel.org
Cc:     Ingo Molnar <mingo@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        kernel test robot <lkp@...el.com>
Subject: [for-next][PATCH 19/24] tracing: Add LATENCY_FS_NOTIFY to define if latency_fsnotify() is
 defined

From: "Steven Rostedt (VMware)" <rostedt@...dmis.org>

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@...el.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@...dmis.org>
---
 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