---

yaml --- r: 366054 b: refs/heads/master c: 515619f h: refs/heads/master v: v3
git-mirror · Apr 15, 2013 · 574f6f9 · 574f6f9
1 parent 853e05a
commit 574f6f9
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Showing 2 changed files with 5 additions and 2 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 32520b2c695b23221751eb09360a6a3dd3105b52
+refs/heads/master: 515619f209114697fabd21eed1623bfa69746815
diff --git a/trunk/kernel/trace/trace_uprobe.c b/trunk/kernel/trace/trace_uprobe.c
@@ -820,6 +820,10 @@ static void uprobe_perf_print(struct trace_uprobe *tu,
 		return;
 
 	preempt_disable();
+	head = this_cpu_ptr(call->perf_events);
+	if (hlist_empty(head))
+		goto out;
+
 	entry = perf_trace_buf_prepare(size, call->event.type, regs, &rctx);
 	if (!entry)
 		goto out;
@@ -836,7 +840,6 @@ static void uprobe_perf_print(struct trace_uprobe *tu,
 	for (i = 0; i < tu->nr_args; i++)
 		call_fetch(&tu->args[i].fetch, regs, data + tu->args[i].offset);
 
-	head = this_cpu_ptr(call->perf_events);
 	perf_trace_buf_submit(entry, size, rctx, 0, 1, regs, head, NULL);
  out:
 	preempt_enable();