Support soft-mode disabling on kprobe-based dynamic events.
Soft-disabling is just ignoring recording if the soft disabled
flag is set.
Signed-off-by: Masami Hiramatsu <masami.hiramatsu...@hitachi.com>
Cc: Steven Rostedt <rost...@goodmis.org>
Cc: Frederic Weisbecker <fweis...@gmail.com>
Cc: Ingo Molnar <mi...@redhat.com>
Cc: Tom Zanussi <tom.zanu...@intel.com>
Cc: Oleg Nesterov <o...@redhat.com>
Cc: Srikar Dronamraju <sri...@linux.vnet.ibm.com>
---
kernel/trace/trace_kprobe.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
index fee865d..636d45f 100644
--- a/kernel/trace/trace_kprobe.c
+++ b/kernel/trace/trace_kprobe.c
@@ -845,6 +845,9 @@ __kprobe_trace_func(struct trace_probe *tp, struct pt_regs
*regs,
WARN_ON(call != ftrace_file->event_call);
+ if (test_bit(FTRACE_EVENT_FL_SOFT_DISABLED_BIT, &ftrace_file->flags))
+ return;
+
local_save_flags(irq_flags);
pc = preempt_count();
@@ -893,6 +896,9 @@ __kretprobe_trace_func(struct trace_probe *tp, struct
kretprobe_instance *ri,
WARN_ON(call != ftrace_file->event_call);
+ if (test_bit(FTRACE_EVENT_FL_SOFT_DISABLED_BIT, &ftrace_file->flags))
+ return;
+
local_save_flags(irq_flags);
pc = preempt_count();
--
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