FAILED: patch "[PATCH] fs: dlm: interrupt posix locks only when process is killed" failed to apply to 4.19-stable tree

[<gregkh@linuxfoundation.org>]

The patch below does not apply to the 4.19-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@vger.kernel.org>.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-4.19.y
git checkout FETCH_HEAD
git cherry-pick -x 59e45c758ca1b9893ac923dd63536da946ac333b
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable@vger.kernel.org>' --in-reply-to '2023072152-luminous-passage-32ab@gregkh' --subject-prefix 'PATCH 4.19.y' HEAD^..

Possible dependencies:

59e45c758ca1 ("fs: dlm: interrupt posix locks only when process is killed")
a800ba77fd28 ("dlm: rearrange async condition return")
bcbb4ba6c9ba ("dlm: cleanup plock_op vs plock_xop")
42252d0d2aa9 ("dlm: fix plock invalid read")

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 59e45c758ca1b9893ac923dd63536da946ac333b Mon Sep 17 00:00:00 2001
From: Alexander Aring <aahringo@redhat.com>
Date: Fri, 19 May 2023 11:21:26 -0400
Subject: [PATCH] fs: dlm: interrupt posix locks only when process is killed

If a posix lock request is waiting for a result from user space
(dlm_controld), do not let it be interrupted unless the process
is killed. This reverts commit a6b1533e9a57 ("dlm: make posix locks
interruptible"). The problem with the interruptible change is
that all locks were cleared on any signal interrupt. If a signal
was received that did not terminate the process, the process
could continue running after all its dlm posix locks had been
cleared. A future patch will add cancelation to allow proper
interruption.

Cc: stable@vger.kernel.org
Fixes: a6b1533e9a57 ("dlm: make posix locks interruptible")
Signed-off-by: Alexander Aring <aahringo@redhat.com>
Signed-off-by: David Teigland <teigland@redhat.com>

diff --git a/fs/dlm/plock.c b/fs/dlm/plock.c
index fea2157fac5b..31bc601ee3d8 100644
--- a/fs/dlm/plock.c
+++ b/fs/dlm/plock.c
@@ -155,7 +155,7 @@ int dlm_posix_lock(dlm_lockspace_t *lockspace, u64 number, struct file *file,
 
 	send_op(op);
 
-	rv = wait_event_interruptible(recv_wq, (op->done != 0));
+	rv = wait_event_killable(recv_wq, (op->done != 0));
 	if (rv == -ERESTARTSYS) {
 		spin_lock(&ops_lock);
 		/* recheck under ops_lock if we got a done != 0,