linux-kernel - [PATCH] dax: constify the struct device

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Message-Id: <20240219-device_cleanup-dax-v1-1-6b319ee89dc2@marliere.net>
Date: Mon, 19 Feb 2024 09:47:28 -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] dax: constify the struct device_type usage

Since commit aed65af1cc2f ("drivers: make device_type const"), the driver
core can properly handle constant struct device_type. Move the
dax_mapping_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>
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 1ff1ab5fa105..e265ba019785 100644
--- a/drivers/dax/bus.c
+++ b/drivers/dax/bus.c
@@ -763,7 +763,7 @@ static const struct attribute_group *dax_mapping_attribute_groups[] = {
 	NULL,
 };

-static struct device_type dax_mapping_type = {
+static const struct device_type dax_mapping_type = {
 	.release = dax_mapping_release,
 	.groups = dax_mapping_attribute_groups,
 };

---
base-commit: b401b621758e46812da61fa58a67c3fd8d91de0d
change-id: 20240219-device_cleanup-dax-d82fd0c67ffd

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