From:   Yajun Deng <yajun.deng@linux.dev>
To:     mingo@redhat.com, peterz@infradead.org, juri.lelli@redhat.com,
        vincent.guittot@linaro.org
Cc:     dietmar.eggemann@arm.com, rostedt@goodmis.org, bsegall@google.com,
        mgorman@suse.de, bristot@redhat.com, linux-kernel@vger.kernel.org,
        Yajun Deng <yajun.deng@linux.dev>
Subject: [PATCH] completion: introduce complete_put() helper function
Date:   Mon,  6 Dec 2021 12:03:19 +0800
Message-Id: <20211206040319.7063-1-yajun.deng@linux.dev>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

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@linux.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