tracing: Fix return of trace_dump_stack()
The trace_dump_stack() returned a value for a void function.
Also, added the missing stub for trace_dump_stack() when tracing is
not configured.
Reported-by: Ingo Molnar <mingo@elte.hu>
LKML-Reference: <20091214162713.GA31060@elte.hu>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 5ad4199..f1dc752 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -527,6 +527,7 @@
static inline void tracing_start(void) { }
static inline void tracing_stop(void) { }
static inline void ftrace_off_permanent(void) { }
+static inline void trace_dump_stack(void) { }
static inline int
trace_printk(const char *fmt, ...)
{
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index bd7b969..ee61915 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -1158,7 +1158,7 @@
unsigned long flags;
if (tracing_disabled || tracing_selftest_running)
- return 0;
+ return;
local_save_flags(flags);