watch_queue: Make comment about setting ->defunct more accurate

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@google.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/kernel/watch_queue.c b/kernel/watch_queue.c
index 1a13066bf6faeb0c25455a3d4004121cc269623a..055bc20ecdda58db46615a42c0ccfd270dc38af6 100644 (file)
--- a/kernel/watch_queue.c
+++ b/kernel/watch_queue.c
@@ -569,7 +569,7 @@ void watch_queue_clear(struct watch_queue *wqueue)
        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)) {