[PATCH] tracing: function return tracer, build fix

[Ingo Molnar]

fix:

 arch/x86/kernel/ftrace.c: In function 'ftrace_return_to_handler':
 arch/x86/kernel/ftrace.c:112: error: implicit declaration of function 'cpu_clock'

cpu_clock() is implicitly included via a number of ways, but its real
location is sched.h. (Build failure is triggerable if enough other
kernel components are turned off.)

Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
---
 arch/x86/kernel/ftrace.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c
index 9b2325a..16a571d 100644
--- a/arch/x86/kernel/ftrace.c
+++ b/arch/x86/kernel/ftrace.c
@@ -14,6 +14,7 @@
 #include <linux/uaccess.h>
 #include <linux/ftrace.h>
 #include <linux/percpu.h>
+#include <linux/sched.h>
 #include <linux/init.h>
 #include <linux/list.h>
 

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