ftrace: add ftrace_vprintk

Impact: new helper function

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 8 insertions, 0 deletions

diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h
index 9f7880d87c39..7840e718c6c7 100644
--- a/include/linux/ftrace.h
+++ b/include/linux/ftrace.h
@@ -302,6 +302,9 @@ ftrace_special(unsigned long arg1, unsigned long arg2, unsigned long arg3);
 extern int
 __ftrace_printk(unsigned long ip, const char *fmt, ...)
         __attribute__ ((format (printf, 2, 3)));
+# define ftrace_vprintk(fmt, ap) __ftrace_printk(_THIS_IP_, fmt, ap)
+extern int
+__ftrace_vprintk(unsigned long ip, const char *fmt, va_list ap);
 extern void ftrace_dump(void);
 #else
 static inline void
@@ -317,6 +320,11 @@ ftrace_printk(const char *fmt, ...)
 {
         return 0;
 }
+static inline int
+ftrace_vprintk(const char *fmt, va_list ap)
+{
+        return 0;
+}
 static inline void ftrace_dump(void) { }
 #endif