linux-kernel - [PATCH 5/6] Documentation: tracing: Add %return suffix description

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Message-Id: <159887797048.1330989.6092698289026009625.stgit@devnote2>
Date:   Mon, 31 Aug 2020 21:46:10 +0900
From:   Masami Hiramatsu <mhiramat@...nel.org>
To:     Steven Rostedt <rostedt@...dmis.org>,
        Jonathan Corbet <corbet@....net>
Cc:     mhiramat@...nel.org, linux-kernel@...r.kernel.org,
        linux-doc@...r.kernel.org
Subject: [PATCH 5/6] Documentation: tracing: Add %return suffix description

Add a description of the %return suffix option for kprobe tracer.

Signed-off-by: Masami Hiramatsu <mhiramat@...nel.org>
---
 Documentation/trace/kprobetrace.rst |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/Documentation/trace/kprobetrace.rst b/Documentation/trace/kprobetrace.rst
index c1709165c553..d29d1f9e6721 100644
--- a/Documentation/trace/kprobetrace.rst
+++ b/Documentation/trace/kprobetrace.rst
@@ -30,6 +30,7 @@ Synopsis of kprobe_events
 
   p[:[GRP/]EVENT] [MOD:]SYM[+offs]|MEMADDR [FETCHARGS]	: Set a probe
   r[MAXACTIVE][:[GRP/]EVENT] [MOD:]SYM[+0] [FETCHARGS]	: Set a return probe
+  p:[GRP/]EVENT] [MOD:]SYM[+0]%return [FETCHARGS]	: Set a return probe
   -:[GRP/]EVENT						: Clear a probe
 
  GRP		: Group name. If omitted, use "kprobes" for it.
@@ -37,6 +38,7 @@ Synopsis of kprobe_events
 		  based on SYM+offs or MEMADDR.
  MOD		: Module name which has given SYM.
  SYM[+offs]	: Symbol+offset where the probe is inserted.
+ SYM%return     : Return address of the symbol
  MEMADDR	: Address where the probe is inserted.
  MAXACTIVE	: Maximum number of instances of the specified function that
 		  can be probed simultaneously, or 0 for the default value