linux-kernel - [PATCH 5.16 112/121] watch_queue: Make comment about setting ->defunct more accurate

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Date:   Mon, 14 Mar 2022 12:54:55 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Jann Horn <jannh@...gle.com>,
        David Howells <dhowells@...hat.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Subject: [PATCH 5.16 112/121] watch_queue: Make comment about setting ->defunct more accurate

From: David Howells <dhowells@...hat.com>

commit 4edc0760412b0c4ecefc7e02cb855b310b122825 upstream.

watch_queue_clear() has a comment stating that setting ->defunct to true
preventing new additions as well as preventing notifications.  Whilst
the latter is true, the first bit is superfluous since at the time this
function is called, the pipe cannot be accessed to add new event
sources.

Remove the "new additions" bit from the comment.

Fixes: c73be61cede5 ("pipe: Add general notification queue support")
Reported-by: Jann Horn <jannh@...gle.com>
Signed-off-by: David Howells <dhowells@...hat.com>
Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 kernel/watch_queue.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/kernel/watch_queue.c
+++ b/kernel/watch_queue.c
@@ -569,7 +569,7 @@ void watch_queue_clear(struct watch_queu
 	rcu_read_lock();
 	spin_lock_bh(&wqueue->lock);
 
-	/* Prevent new additions and prevent notifications from happening */
+	/* Prevent new notifications from being stored. */
 	wqueue->defunct = true;
 
 	while (!hlist_empty(&wqueue->watches)) {