From: Haotian Zhang <vulab@iscas.ac.cn>
Date: Mon, 1 Dec 2025 07:41:03 +0000 (+0800)
Subject: dm log-writes: Add missing set_freezable() for freezable kthread
X-Git-Tag: v6.17.13~21
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ec483aee67154b90ada731c5388aa506960c16bd;p=thirdparty%2Fkernel%2Fstable.git

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>
---

diff --git a/drivers/md/dm-log-writes.c b/drivers/md/dm-log-writes.c
index 679b07dee2294..1f8fbc27a12f8 100644
--- a/drivers/md/dm-log-writes.c
+++ b/drivers/md/dm-log-writes.c
@@ -432,6 +432,7 @@ static int log_writes_kthread(void *arg)
 	struct log_writes_c *lc = arg;
 	sector_t sector = 0;
 
+	set_freezable();
 	while (!kthread_should_stop()) {
 		bool super = false;
 		bool logging_enabled;