tracing: Fix to use __always_unused attribute

____ftrace_check_##name() is used for compile-time check on
F_printk() only, so it should be marked as __unused instead
of __used.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
LKML-Reference: <4AEE2D01.4010305@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 2 insertions, 2 deletions

diff --git a/kernel/trace/trace_export.c b/kernel/trace/trace_export.c
index 9753fcc61bc5..c74848ddb85a 100644
--- a/kernel/trace/trace_export.c
+++ b/kernel/trace/trace_export.c
@@ -48,11 +48,11 @@
 struct ____ftrace_##name {                                      \
         tstruct                                                 \
 };                                                              \
-static void __used ____ftrace_check_##name(void)                \
+static void __always_unused ____ftrace_check_##name(void)       \
 {                                                               \
         struct ____ftrace_##name *__entry = NULL;               \
                                                                 \
-        /* force cmpile-time check on F_printk() */             \
+        /* force compile-time check on F_printk() */            \
         printk(print);                                          \
 }