linux-kernel - [PATCH 3/3] kprobes/x86: stacktool: ignore kretprobe_trampoline

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Date:	Thu, 17 Sep 2015 17:14:37 -0500
From:	Chris J Arges <chris.j.arges@...onical.com>
To:	x86@...nel.org, jpoimboe@...hat.com, tglx@...utronix.de,
	mingo@...hat.com, hpa@...or.com
Cc:	live-patching@...r.kernel.org, linux-kernel@...r.kernel.org,
	mmarek@...e.cz, peterz@...radead.org, luto@...nel.org,
	bp@...en8.de, torvalds@...ux-foundation.org, andi@...stfloor.org,
	palves@...hat.com, namhyung@...il.com, bernd@...rovitsch.priv.at,
	akpm@...ux-foundation.org, konrad.wilk@...cle.com,
	boris.ostrovsky@...cle.com, david.vrabel@...rix.com,
	jeremy@...p.org, chrisw@...s-sol.org, akataria@...are.com,
	rusty@...tcorp.com.au, herbert@...dor.apana.org.au,
	davem@...emloft.net, pavel@....cz, rjw@...ysocki.net,
	len.brown@...el.com, matt.fleming@...el.com,
	Chris J Arges <chris.j.arges@...onical.com>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Petr Mladek <pmladek@...e.cz>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	Eugene Shatokhin <eugene.shatokhin@...alab.ru>,
	"Steven Rostedt (Red Hat)" <rostedt@...dmis.org>
Subject: [PATCH 3/3] kprobes/x86: stacktool: ignore kretprobe_trampoline_holder

The function kretprobe_trampoline_holder isn't called explicility and therefore
should be ignored by stacktool.

Signed-off-by: Chris J Arges <chris.j.arges@...onical.com>
---
 arch/x86/kernel/kprobes/core.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/x86/kernel/kprobes/core.c b/arch/x86/kernel/kprobes/core.c
index 1deffe6..3ade909 100644
--- a/arch/x86/kernel/kprobes/core.c
+++ b/arch/x86/kernel/kprobes/core.c
@@ -49,6 +49,7 @@
 #include <linux/kdebug.h>
 #include <linux/kallsyms.h>
 #include <linux/ftrace.h>
+#include <linux/stacktool.h>
 
 #include <asm/cacheflush.h>
 #include <asm/desc.h>
@@ -704,6 +705,7 @@ static void __used kretprobe_trampoline_holder(void)
 }
 NOKPROBE_SYMBOL(kretprobe_trampoline_holder);
 NOKPROBE_SYMBOL(kretprobe_trampoline);
+STACKTOOL_IGNORE_FUNC(kretprobe_trampoline_holder);
 
 /*
  * Called from kretprobe_trampoline
-- 
1.9.1

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