linux-kernel - [PATCH] workqueue: cancel_rearming_delayed

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Message-ID: <20070420121255.GA4042@ff.dom.local>
Date:	Fri, 20 Apr 2007 14:12:56 +0200
From:	Jarek Poplawski <jarkao2@...pl>
To:	David Chinner <dgc@....com>
Cc:	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>,
	Oleg Nesterov <oleg@...sign.ru>
Subject: [PATCH] workqueue: cancel_rearming_delayed_work/workqueue usage warning


Here is my proposal to make things clearer:
(this time on 2.6.21-rc7)

CC: David Chinner <dgc@....com>
CC: Oleg Nesterov <oleg@...sign.ru>
Signed-off-by: Jarek Poplawski <jarkao2@...pl>

---

diff -Nurp 2.6.21-rc7-/kernel/workqueue.c 2.6.21-rc7/kernel/workqueue.c
--- 2.6.21-rc7-/kernel/workqueue.c	2007-04-18 10:14:16.000000000 +0200
+++ 2.6.21-rc7/kernel/workqueue.c	2007-04-20 13:56:51.000000000 +0200
@@ -662,6 +662,8 @@ EXPORT_SYMBOL(flush_scheduled_work);
  * cancel_rearming_delayed_workqueue - reliably kill off a delayed work whose handler rearms the delayed work.
  * @wq:   the controlling workqueue structure
  * @dwork: the delayed work struct
+ *
+ * WARNING: use only with handlers, which rearm unconditionally with delay > 0
  */
 void cancel_rearming_delayed_workqueue(struct workqueue_struct *wq,
 				       struct delayed_work *dwork)
@@ -674,6 +676,8 @@ EXPORT_SYMBOL(cancel_rearming_delayed_wo
 /**
  * cancel_rearming_delayed_work - reliably kill off a delayed keventd work whose handler rearms the delayed work.
  * @dwork: the delayed work struct
+ *
+ * WARNING: use only with handlers, which rearm unconditionally with delay > 0
  */
 void cancel_rearming_delayed_work(struct delayed_work *dwork)
 {
-
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