From 29948a191df8a86bb3572429808ced4906a524f4 Mon Sep 17 00:00:00 2001
From: Haotian Zhang <vulab@iscas.ac.cn>
Date: Mon, 1 Dec 2025 15:41:03 +0800
Subject: [PATCH] dm log-writes: Add missing set_freezable() for freezable
 kthread

[ Upstream commit ab08f9c8b363297cafaf45475b08f78bf19b88ef ]

The log_writes_kthread() calls try_to_freeze() but lacks set_freezable(),
rendering the freeze attempt ineffective since kernel threads are
non-freezable by default. This prevents proper thread suspension during
system suspend/hibernate.

Add set_freezable() to explicitly mark the thread as freezable.

Fixes: 0e9cebe72459 ("dm: add log writes target")
Signed-off-by: Haotian Zhang <vulab@iscas.ac.cn>
Reviewed-by: Benjamin Marzinski <bmarzins@redhat.com>
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Ulrich Hecht <uli@kernel.org>
---
 drivers/md/dm-log-writes.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/md/dm-log-writes.c b/drivers/md/dm-log-writes.c
index e549392e0ea5..f3aacd2862d1 100644
--- a/drivers/md/dm-log-writes.c
+++ b/drivers/md/dm-log-writes.c
@@ -454,6 +454,7 @@ static int log_writes_kthread(void *arg)
 	struct log_writes_c *lc = (struct log_writes_c *)arg;
 	sector_t sector = 0;
 
+	set_freezable();
 	while (!kthread_should_stop()) {
 		bool super = false;
 		bool logging_enabled;