[PATCH 07/18] tracing/kprobes: Fix to increment return event probe hit-count

Steven Rostedt
2013-05-11T00:13:58Z

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From: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>

Fix to increment probe hit-count for function return event.

Link: http://lkml.kernel.org/r/20130509054424.30398.34058.stgit@mhiramat-M0-7522

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Tom Zanussi <tom.zanussi@intel.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
---
kernel/trace/trace_kprobe.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
index 1865d5f..6928633 100644
--- a/kernel/trace/trace_kprobe.c
+++ b/kernel/trace/trace_kprobe.c
@@ -767,6 +767,8 @@ static __kprobes void kretprobe_trace_func(struct kretprobe_instance *ri,
unsigned long irq_flags;
struct ftrace_event_call *call = &tp->call;

+ tp->nhit++;
+
local_save_flags(irq_flags);
pc = preempt_count();