linux-kernel - [PATCH] device-dax: make dax_bus

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Message-Id: <20240204-bus_cleanup-dax-v1-1-69a6e4a8553b@marliere.net>
Date: Sun, 04 Feb 2024 13:07:11 -0300
From: "Ricardo B. Marliere" <ricardo@...liere.net>
To: Dan Williams <dan.j.williams@...el.com>, 
 Vishal Verma <vishal.l.verma@...el.com>, Dave Jiang <dave.jiang@...el.com>
Cc: nvdimm@...ts.linux.dev, linux-cxl@...r.kernel.org, 
 linux-kernel@...r.kernel.org, 
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
 "Ricardo B. Marliere" <ricardo@...liere.net>
Subject: [PATCH] device-dax: make dax_bus_type const

Now that the driver core can properly handle constant struct bus_type,
move the dax_bus_type variable to be a constant structure as well,
placing it into read-only memory which can not be modified at runtime.

Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Suggested-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Ricardo B. Marliere <ricardo@...liere.net>
---
 drivers/dax/bus.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/dax/bus.c b/drivers/dax/bus.c
index 1659b787b65f..fe0a415c854d 100644
--- a/drivers/dax/bus.c
+++ b/drivers/dax/bus.c
@@ -222,7 +222,7 @@ static void dax_bus_remove(struct device *dev)
 		dax_drv->remove(dev_dax);
 }

-static struct bus_type dax_bus_type = {
+static const struct bus_type dax_bus_type = {
 	.name = "dax",
 	.uevent = dax_bus_uevent,
 	.match = dax_bus_match,

---
base-commit: 73bf93edeeea866b0b6efbc8d2595bdaaba7f1a5
change-id: 20240204-bus_cleanup-dax-52c34f72615f

Best regards,
-- 
Ricardo B. Marliere <ricardo@...liere.net>