linux-kernel - [PATCH] ftrace/x86: Fix missing ops arg on static function tracing

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Message-Id: <1447493548-31978-1-git-send-email-namhyung@kernel.org>
Date:	Sat, 14 Nov 2015 18:32:28 +0900
From:	Namhyung Kim <namhyung@...nel.org>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	x86@...nel.org, Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...nel.org>,
	"H. Peter Anvin" <hpa@...ux.intel.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH] ftrace/x86: Fix missing ops arg on static function tracing

The commit f1ab00af816e ("ftrace/x86: Get rid of ftrace_caller_setup")
moved code that loads ftrace_ops into 3rd parameter but it missed to do
for static tracing.

Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
 arch/x86/kernel/mcount_64.S | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/x86/kernel/mcount_64.S b/arch/x86/kernel/mcount_64.S
index 94ea120fa21f..6c1ccf9e5427 100644
--- a/arch/x86/kernel/mcount_64.S
+++ b/arch/x86/kernel/mcount_64.S
@@ -278,6 +278,9 @@ trace:
 	/* save_mcount_regs fills in first two parameters */
 	save_mcount_regs
 
+	/* Load the ftrace_ops into the 3rd parameter */
+	movq function_trace_op(%rip), %rdx
+
 	call   *ftrace_trace_function
 
 	restore_mcount_regs
-- 
2.6.2

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