linux-kernel - [PATCH v2] mm/damon: remove obsolete comments of kdamond

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Message-Id: <20220531020421.46849-1-zhouchengming@bytedance.com>
Date:   Tue, 31 May 2022 10:04:21 +0800
From:   Chengming Zhou <zhouchengming@...edance.com>
To:     sj@...nel.org
Cc:     damon@...ts.linux.dev, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org,
        Chengming Zhou <zhouchengming@...edance.com>
Subject: [PATCH v2] mm/damon: remove obsolete comments of kdamond_stop

Since commit 0f91d13366a4 ("mm/damon: simplify stop mechanism")
delete kdamond_stop and change to use kthread stop mechanism,
these obsolete comments should be removed accordingly.

Reviewed-by: SeongJae Park <sj@...nel.org>
Signed-off-by: Chengming Zhou <zhouchengming@...edance.com>
---
v2:
 - explicit termination uses damon_stop() instead of __damon_stop()
---
 include/linux/damon.h | 17 ++++++++---------
 1 file changed, 8 insertions(+), 9 deletions(-)

diff --git a/include/linux/damon.h b/include/linux/damon.h
index 7c62da31ce4b..2765c7d99beb 100644
--- a/include/linux/damon.h
+++ b/include/linux/damon.h
@@ -397,7 +397,6 @@ struct damon_callback {
  * detail.
  *
  * @kdamond:		Kernel thread who does the monitoring.
- * @kdamond_stop:	Notifies whether kdamond should stop.
  * @kdamond_lock:	Mutex for the synchronizations with @kdamond.
  *
  * For each monitoring context, one kernel thread for the monitoring is
@@ -406,14 +405,14 @@ struct damon_callback {
  * Once started, the monitoring thread runs until explicitly required to be
  * terminated or every monitoring target is invalid.  The validity of the
  * targets is checked via the &damon_operations.target_valid of @ops.  The
- * termination can also be explicitly requested by writing non-zero to
- * @kdamond_stop.  The thread sets @kdamond to NULL when it terminates.
- * Therefore, users can know whether the monitoring is ongoing or terminated by
- * reading @kdamond.  Reads and writes to @kdamond and @kdamond_stop from
- * outside of the monitoring thread must be protected by @kdamond_lock.
- *
- * Note that the monitoring thread protects only @kdamond and @kdamond_stop via
- * @kdamond_lock.  Accesses to other fields must be protected by themselves.
+ * termination can also be explicitly requested by calling damon_stop().
+ * The thread sets @kdamond to NULL when it terminates. Therefore, users can
+ * know whether the monitoring is ongoing or terminated by reading @kdamond.
+ * Reads and writes to @kdamond from outside of the monitoring thread must
+ * be protected by @kdamond_lock.
+ *
+ * Note that the monitoring thread protects only @kdamond via @kdamond_lock.
+ * Accesses to other fields must be protected by themselves.
  *
  * @ops:	Set of monitoring operations for given use cases.
  * @callback:	Set of callbacks for monitoring events notifications.
-- 
2.36.1