Impact: New API
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
---
include/linux/ftrace.h | 8 ++++++++
kernel/trace/trace.c | 9 +++++++++
2 files changed, 17 insertions(+), 0 deletions(-)
diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h
index 9f7880d..7840e71 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
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 2129ab9..2f8ac1f 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -2951,6 +2951,15 @@ int __ftrace_printk(unsigned long ip, const char *fmt, ...)
}
EXPORT_SYMBOL_GPL(__ftrace_printk);
+int __ftrace_vprintk(unsigned long ip, const char *fmt, va_list ap)
+{
+ if (!(trace_flags & TRACE_ITER_PRINTK))
+ return 0;
+
+ return trace_vprintk(ip, task_curr_ret_stack(current), fmt, ap);
+}
+EXPORT_SYMBOL_GPL(__ftrace_vprintk);
+
static int trace_panic_handler(struct notifier_block *this,
unsigned long event, void *unused)
{
--
1.6.0.6