linux-kernel - [PATCH] completion: introduce complete

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Message-Id: <20211206040319.7063-1-yajun.deng@linux.dev>
Date:   Mon,  6 Dec 2021 12:03:19 +0800
From:   Yajun Deng <yajun.deng@...ux.dev>
To:     mingo@...hat.com, peterz@...radead.org, juri.lelli@...hat.com,
        vincent.guittot@...aro.org
Cc:     dietmar.eggemann@....com, rostedt@...dmis.org, bsegall@...gle.com,
        mgorman@...e.de, bristot@...hat.com, linux-kernel@...r.kernel.org,
        Yajun Deng <yajun.deng@...ux.dev>
Subject: [PATCH] completion: introduce complete_put() helper function

There are many cases where it is necessary to decrease refcount and test,
then called complete(). So introduce complete_put() helper function.

Signed-off-by: Yajun Deng <yajun.deng@...ux.dev>
---
 kernel/sched/completion.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/kernel/sched/completion.c b/kernel/sched/completion.c
index a778554f9dad..dcb737f1edc2 100644
--- a/kernel/sched/completion.c
+++ b/kernel/sched/completion.c
@@ -38,6 +38,13 @@ void complete(struct completion *x)
 }
 EXPORT_SYMBOL(complete);
 
+void complete_put(refcount_t *r, struct completion *x)
+{
+	if (refcount_dec_and_test(r))
+		complete(x);
+}
+EXPORT_SYMBOL(complete_put);
+
 /**
  * complete_all: - signals all threads waiting on this completion
  * @x:  holds the state of this particular completion
-- 
2.32.0