linux-kernel - [PATCH] tracing: Fix documentation about disabling options using trace

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Message-ID: <154872690031.47356.5739053380942044586.stgit@srivatsa-ubuntu>
Date:   Mon, 28 Jan 2019 17:55:53 -0800
From:   "Srivatsa S. Bhat" <srivatsa@...il.mit.edu>
To:     rostedt@...dmis.org, mingo@...hat.com
Cc:     srivatsa@...il.mit.edu, linux-kernel@...r.kernel.org
Subject: [PATCH] tracing: Fix documentation about disabling options using
 trace_options

From: Srivatsa S. Bhat (VMware) <srivatsa@...il.mit.edu>

To disable a tracing option using the trace_options file, the option
name needs to be prefixed with 'no', and not suffixed, as the README
states. Fix it.

Signed-off-by: Srivatsa S. Bhat (VMware) <srivatsa@...il.mit.edu>
---

 kernel/trace/trace.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index c521b73..d632458 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -4541,7 +4541,7 @@ static const char readme_msg[] =
 	"  instances\t\t- Make sub-buffers with: mkdir instances/foo\n"
 	"\t\t\t  Remove sub-buffer with rmdir\n"
 	"  trace_options\t\t- Set format or modify how tracing happens\n"
-	"\t\t\t  Disable an option by adding a suffix 'no' to the\n"
+	"\t\t\t  Disable an option by prefixing 'no' to the\n"
 	"\t\t\t  option name\n"
 	"  saved_cmdlines_size\t- echo command number in here to store comm-pid list\n"
 #ifdef CONFIG_DYNAMIC_FTRACE