Revert "workqueue: remove unused cancel_work()"

[ Upstream commit 73b4b53276a1d6290cd4f47dbbc885b6e6e59ac6 ]

This reverts commit 6417250d3f894e66a68ba1cd93676143f2376a6f.

amdpgu need this function in order to prematurly stop pending
reset works when another reset work already in progress.

Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Reviewed-by: Lai Jiangshan<jiangshanlai@gmail.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Stable-dep-of: 91d3d149978b ("r8169: prevent potential deadlock in rtl8169_close")
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/include/linux/workqueue.h b/include/linux/workqueue.h
index 1e96680f5023089ca448e4ca42f1e0ff85b688cf..5f2e531d0a80d24f0ad7e52772f71a9b5254f95d 100644 (file)
--- a/include/linux/workqueue.h
+++ b/include/linux/workqueue.h
@@ -462,6 +462,7 @@ extern int schedule_on_each_cpu(work_func_t func);
 int execute_in_process_context(work_func_t fn, struct execute_work *);
 
 extern bool flush_work(struct work_struct *work);
+extern bool cancel_work(struct work_struct *work);
 extern bool cancel_work_sync(struct work_struct *work);
 
 extern bool flush_delayed_work(struct delayed_work *dwork);

diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 962ee27ec7d7045848635e55bf76091a546a9357..d5f30b610217ee8a4374e135d34a3b171cb3a34a 100644 (file)
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -3277,6 +3277,15 @@ static bool __cancel_work(struct work_struct *work, bool is_dwork)
        return ret;
 }
 
+/*
+ * See cancel_delayed_work()
+ */
+bool cancel_work(struct work_struct *work)
+{
+       return __cancel_work(work, false);
+}
+EXPORT_SYMBOL(cancel_work);
+
 /**
  * cancel_delayed_work - cancel a delayed work
  * @dwork: delayed_work to cancel