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[12/21] ftrace: Mark function tracer test functions noinline/noclone

Message ID 20171127213423.27218-13-andi@firstfloor.org (mailing list archive)
State New, archived
Headers show

Commit Message

Andi Kleen Nov. 27, 2017, 9:34 p.m. UTC 
From: Andi Kleen <ak@linux.intel.com>

The ftrace function tracer self tests calls some functions to verify
the get traced. This relies on them not being inlined. Previously
this was ensured by putting them into another file, but with LTO
the compiler can inline across files, which makes the tests fail.

Mark these functions as noinline and noclone.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
---
 kernel/trace/trace_selftest_dynamic.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)
diff mbox

Patch

diff --git a/kernel/trace/trace_selftest_dynamic.c b/kernel/trace/trace_selftest_dynamic.c
index 8cda06a10d66..c364cf777e1a 100644
--- a/kernel/trace/trace_selftest_dynamic.c
+++ b/kernel/trace/trace_selftest_dynamic.c
@@ -1,13 +1,14 @@ 
 // SPDX-License-Identifier: GPL-2.0
+#include <linux/compiler.h>
 #include "trace.h"
 
-int DYN_FTRACE_TEST_NAME(void)
+noinline __noclone int DYN_FTRACE_TEST_NAME(void)
 {
 	/* used to call mcount */
 	return 0;
 }
 
-int DYN_FTRACE_TEST_NAME2(void)
+noinline __noclone int DYN_FTRACE_TEST_NAME2(void)
 {
 	/* used to call mcount */
 	return 0;