linux-kernel - [PATCH 1/3] tracing: Relevant changes for kernel access to Ftrace instances.

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Date:   Wed, 12 Jun 2019 09:34:17 -0700
From:   Divya Indi <divya.indi@...cle.com>
To:     linux-kernel@...r.kernel.org, Steven Rostedt <rostedt@...dmis.org>
Cc:     Divya Indi <divya.indi@...cle.com>,
        Srinivas Eeda <srinivas.eeda@...cle.com>,
        Aruna Ramakrishna <aruna.ramakrishna@...cle.com>
Subject: [PATCH 1/3] tracing: Relevant changes for kernel access to Ftrace instances.

For commit f45d1225adb0 ("tracing: Kernel access to Ftrace instances")
Adding the following changes to ensure other kernel components can
use these functions -
1) Remove static keyword for newly exported fn - ftrace_set_clr_event.
2) Add the req functions to header file include/linux/trace_events.h.

Signed-off-by: Divya Indi <divya.indi@...cle.com>
---
 include/linux/trace_events.h | 6 ++++++
 kernel/trace/trace_events.c  | 2 +-
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/include/linux/trace_events.h b/include/linux/trace_events.h
index 8a62731..d7b7d85 100644
--- a/include/linux/trace_events.h
+++ b/include/linux/trace_events.h
@@ -539,6 +539,12 @@ extern int trace_define_field(struct trace_event_call *call, const char *type,
 
 #define is_signed_type(type)	(((type)(-1)) < (type)1)
 
+void trace_printk_init_buffers(void);
+int trace_array_printk(struct trace_array *tr, unsigned long ip,
+		const char *fmt, ...);
+struct trace_array *trace_array_create(const char *name);
+int trace_array_destroy(struct trace_array *tr);
+int ftrace_set_clr_event(struct trace_array *tr, char *buf, int set);
 int trace_set_clr_event(const char *system, const char *event, int set);
 
 /*
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index 0ce3db6..b6b4618 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -795,7 +795,7 @@ static int __ftrace_set_clr_event(struct trace_array *tr, const char *match,
 	return ret;
 }
 
-static int ftrace_set_clr_event(struct trace_array *tr, char *buf, int set)
+int ftrace_set_clr_event(struct trace_array *tr, char *buf, int set)
 {
 	char *event = NULL, *sub = NULL, *match;
 	int ret;
-- 
1.8.3.1