linux-kernel - [PATCH AUTOSEL 5.15 6/6] um: virtio

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Message-Id: <20250218202848.3593863-6-sashal@kernel.org>
Date: Tue, 18 Feb 2025 15:28:47 -0500
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Johannes Berg <johannes.berg@...el.com>,
	Richard Weinberger <richard@....at>,
	Sasha Levin <sashal@...nel.org>,
	anton.ivanov@...bridgegreys.com,
	johannes@...solutions.net,
	benjamin.berg@...el.com,
	mst@...hat.com,
	tiwei.btw@...group.com,
	jiri@...nulli.us,
	u.kleine-koenig@...gutronix.de,
	linux-um@...ts.infradead.org
Subject: [PATCH AUTOSEL 5.15 6/6] um: virtio_uml: use raw spinlock

From: Johannes Berg <johannes.berg@...el.com>

[ Upstream commit daa1a05ba431540097ec925d4e01d53ef29a98f1 ]

This is needed because at least in time-travel the code
can be called directly from the deep architecture and
IRQ handling code.

Link: https://patch.msgid.link/20250110125550.32479-7-johannes@sipsolutions.net
Signed-off-by: Johannes Berg <johannes.berg@...el.com>
Signed-off-by: Richard Weinberger <richard@....at>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/um/drivers/virtio_uml.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/um/drivers/virtio_uml.c b/arch/um/drivers/virtio_uml.c
index 204e9dfbff1a0..19fe003932f71 100644
--- a/arch/um/drivers/virtio_uml.c
+++ b/arch/um/drivers/virtio_uml.c
@@ -52,7 +52,7 @@ struct virtio_uml_device {
 	struct platform_device *pdev;
 	struct virtio_uml_platform_data *pdata;
 
-	spinlock_t sock_lock;
+	raw_spinlock_t sock_lock;
 	int sock, req_fd, irq;
 	u64 features;
 	u64 protocol_features;
@@ -247,7 +247,7 @@ static int vhost_user_send(struct virtio_uml_device *vu_dev,
 	if (request_ack)
 		msg->header.flags |= VHOST_USER_FLAG_NEED_REPLY;
 
-	spin_lock_irqsave(&vu_dev->sock_lock, flags);
+	raw_spin_lock_irqsave(&vu_dev->sock_lock, flags);
 	rc = full_sendmsg_fds(vu_dev->sock, msg, size, fds, num_fds);
 	if (rc < 0)
 		goto out;
@@ -267,7 +267,7 @@ static int vhost_user_send(struct virtio_uml_device *vu_dev,
 	}
 
 out:
-	spin_unlock_irqrestore(&vu_dev->sock_lock, flags);
+	raw_spin_unlock_irqrestore(&vu_dev->sock_lock, flags);
 	return rc;
 }
 
@@ -1214,7 +1214,7 @@ static int virtio_uml_probe(struct platform_device *pdev)
 		goto error_free;
 	vu_dev->sock = rc;
 
-	spin_lock_init(&vu_dev->sock_lock);
+	raw_spin_lock_init(&vu_dev->sock_lock);
 
 	rc = vhost_user_init(vu_dev);
 	if (rc)
-- 
2.39.5