linux-kernel - [PATCH] trace: add missing forward declaration

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Message-Id: <20180416023626.139915-1-cwahbong@google.com>
Date:   Mon, 16 Apr 2018 10:36:25 +0800
From:   Ahbong Chang <cwahbong@...gle.com>
To:     linux-kernel@...r.kernel.org
Cc:     Ahbong Chang <cwahbong@...gle.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Ingo Molnar <mingo@...hat.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Todd Poynor <toddpoynor@...gle.com>,
        Philippe Ombredanne <pombredanne@...b.com>
Subject: [PATCH] trace: add missing forward declaration

Without this forward declaration compile may fail if this header is
included only for registering other probe event without struct
pool_workqueue.

Signed-off-by: Ahbong Chang <cwahbong@...gle.com>
Reviewed-by: Todd Poynor <toddpoynor@...gle.com>
---
 include/trace/events/workqueue.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/trace/events/workqueue.h b/include/trace/events/workqueue.h
index 2f057a494d93..9a761bc6a251 100644
--- a/include/trace/events/workqueue.h
+++ b/include/trace/events/workqueue.h
@@ -25,6 +25,8 @@ DECLARE_EVENT_CLASS(workqueue_work,
 	TP_printk("work struct %p", __entry->work)
 );
 
+struct pool_workqueue;
+
 /**
  * workqueue_queue_work - called when a work gets queued
  * @req_cpu:	the requested cpu
-- 
2.17.0.484.g0c8726318c-goog