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Date: Wed, 23 Nov 2022 13:25:22 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Jens Axboe <axboe@...nel.dk>,
Alison Schofield <alison.schofield@...el.com>,
Vishal Verma <vishal.l.verma@...el.com>,
Ira Weiny <ira.weiny@...el.com>,
Ben Widawsky <bwidawsk@...nel.org>,
Dan Williams <dan.j.williams@...el.com>,
Jeremy Kerr <jk@...abs.org>, Joel Stanley <joel@....id.au>,
Alistar Popple <alistair@...ple.id.au>,
Eddie James <eajames@...ux.ibm.com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Jonathan Cameron <Jonathan.Cameron@...wei.com>,
Jilin Yuan <yuanjilin@...rlc.com>,
Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
Alan Stern <stern@...land.harvard.edu>,
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
Thomas Gleixner <tglx@...utronix.de>,
Jason Gunthorpe <jgg@...pe.ca>,
"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
Won Chung <wonchung@...gle.com>, linux-block@...r.kernel.org,
linux-cxl@...r.kernel.org, linux-fsi@...ts.ozlabs.org,
linux-usb@...r.kernel.org
Subject: [PATCH 4/5] driver core: make struct device_type.devnode() take a const *
The devnode() callback in struct device_type should not be modifying the
device that is passed into it, so mark it as a const * and propagate the
function signature changes out into all relevant subsystems that use
this callback.
Cc: Jens Axboe <axboe@...nel.dk>
Cc: Alison Schofield <alison.schofield@...el.com>
Cc: Vishal Verma <vishal.l.verma@...el.com>
Cc: Ira Weiny <ira.weiny@...el.com>
Cc: Ben Widawsky <bwidawsk@...nel.org>
Cc: Dan Williams <dan.j.williams@...el.com>
Cc: Jeremy Kerr <jk@...abs.org>
Cc: Joel Stanley <joel@....id.au>
Cc: Alistar Popple <alistair@...ple.id.au>
Cc: Eddie James <eajames@...ux.ibm.com>
Cc: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Cc: Jonathan Cameron <Jonathan.Cameron@...wei.com>
Cc: Jilin Yuan <yuanjilin@...rlc.com>
Cc: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
Cc: Alan Stern <stern@...land.harvard.edu>
Cc: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Jason Gunthorpe <jgg@...pe.ca>
Cc: "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>
Cc: Won Chung <wonchung@...gle.com>
Cc: linux-block@...r.kernel.org
Cc: linux-cxl@...r.kernel.org
Cc: linux-fsi@...ts.ozlabs.org
Cc: linux-kernel@...r.kernel.org
Cc: linux-usb@...r.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
block/genhd.c | 4 ++--
drivers/cxl/core/memdev.c | 2 +-
drivers/fsi/fsi-core.c | 6 +++---
drivers/hwtracing/intel_th/core.c | 6 +++---
drivers/hwtracing/intel_th/intel_th.h | 4 ++--
drivers/usb/core/usb.c | 4 ++--
include/linux/device.h | 2 +-
7 files changed, 14 insertions(+), 14 deletions(-)
diff --git a/block/genhd.c b/block/genhd.c
index 3f1124713442..391b52655b97 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -1193,10 +1193,10 @@ struct class block_class = {
.dev_uevent = block_uevent,
};
-static char *block_devnode(struct device *dev, umode_t *mode,
+static char *block_devnode(const struct device *dev, umode_t *mode,
kuid_t *uid, kgid_t *gid)
{
- struct gendisk *disk = dev_to_disk(dev);
+ const struct gendisk *disk = dev_to_disk(dev);
if (disk->fops->devnode)
return disk->fops->devnode(disk, mode);
diff --git a/drivers/cxl/core/memdev.c b/drivers/cxl/core/memdev.c
index 20ce488a7754..6ae8d0bdc61b 100644
--- a/drivers/cxl/core/memdev.c
+++ b/drivers/cxl/core/memdev.c
@@ -27,7 +27,7 @@ static void cxl_memdev_release(struct device *dev)
kfree(cxlmd);
}
-static char *cxl_memdev_devnode(struct device *dev, umode_t *mode, kuid_t *uid,
+static char *cxl_memdev_devnode(const struct device *dev, umode_t *mode, kuid_t *uid,
kgid_t *gid)
{
return kasprintf(GFP_KERNEL, "cxl/%s", dev_name(dev));
diff --git a/drivers/fsi/fsi-core.c b/drivers/fsi/fsi-core.c
index 694e80c06665..0b927c9f4267 100644
--- a/drivers/fsi/fsi-core.c
+++ b/drivers/fsi/fsi-core.c
@@ -897,10 +897,10 @@ static const struct attribute_group *cfam_attr_groups[] = {
NULL,
};
-static char *cfam_devnode(struct device *dev, umode_t *mode,
+static char *cfam_devnode(const struct device *dev, umode_t *mode,
kuid_t *uid, kgid_t *gid)
{
- struct fsi_slave *slave = to_fsi_slave(dev);
+ const struct fsi_slave *slave = to_fsi_slave(dev);
#ifdef CONFIG_FSI_NEW_DEV_NODE
return kasprintf(GFP_KERNEL, "fsi/cfam%d", slave->cdev_idx);
@@ -915,7 +915,7 @@ static const struct device_type cfam_type = {
.groups = cfam_attr_groups
};
-static char *fsi_cdev_devnode(struct device *dev, umode_t *mode,
+static char *fsi_cdev_devnode(const struct device *dev, umode_t *mode,
kuid_t *uid, kgid_t *gid)
{
#ifdef CONFIG_FSI_NEW_DEV_NODE
diff --git a/drivers/hwtracing/intel_th/core.c b/drivers/hwtracing/intel_th/core.c
index 7e753a75d23b..cc7f879bb175 100644
--- a/drivers/hwtracing/intel_th/core.c
+++ b/drivers/hwtracing/intel_th/core.c
@@ -185,11 +185,11 @@ static struct device_type intel_th_source_device_type = {
.release = intel_th_device_release,
};
-static char *intel_th_output_devnode(struct device *dev, umode_t *mode,
+static char *intel_th_output_devnode(const struct device *dev, umode_t *mode,
kuid_t *uid, kgid_t *gid)
{
- struct intel_th_device *thdev = to_intel_th_device(dev);
- struct intel_th *th = to_intel_th(thdev);
+ const struct intel_th_device *thdev = to_intel_th_device(dev);
+ const struct intel_th *th = to_intel_th(thdev);
char *node;
if (thdev->id >= 0)
diff --git a/drivers/hwtracing/intel_th/intel_th.h b/drivers/hwtracing/intel_th/intel_th.h
index 0ffb42990175..6cbba733f259 100644
--- a/drivers/hwtracing/intel_th/intel_th.h
+++ b/drivers/hwtracing/intel_th/intel_th.h
@@ -205,7 +205,7 @@ struct intel_th_driver {
* INTEL_TH_SWITCH and INTEL_TH_SOURCE are children of the intel_th device.
*/
static inline struct intel_th_device *
-to_intel_th_parent(struct intel_th_device *thdev)
+to_intel_th_parent(const struct intel_th_device *thdev)
{
struct device *parent = thdev->dev.parent;
@@ -215,7 +215,7 @@ to_intel_th_parent(struct intel_th_device *thdev)
return to_intel_th_device(parent);
}
-static inline struct intel_th *to_intel_th(struct intel_th_device *thdev)
+static inline struct intel_th *to_intel_th(const struct intel_th_device *thdev)
{
if (thdev->type == INTEL_TH_OUTPUT)
thdev = to_intel_th_parent(thdev);
diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c
index 8527c06b65e6..4df26f4f76e6 100644
--- a/drivers/usb/core/usb.c
+++ b/drivers/usb/core/usb.c
@@ -505,10 +505,10 @@ static const struct dev_pm_ops usb_device_pm_ops = {
#endif /* CONFIG_PM */
-static char *usb_devnode(struct device *dev,
+static char *usb_devnode(const struct device *dev,
umode_t *mode, kuid_t *uid, kgid_t *gid)
{
- struct usb_device *usb_dev;
+ const struct usb_device *usb_dev;
usb_dev = to_usb_device(dev);
return kasprintf(GFP_KERNEL, "bus/usb/%03d/%03d",
diff --git a/include/linux/device.h b/include/linux/device.h
index 46093bae6905..4ad1280713e6 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -89,7 +89,7 @@ struct device_type {
const char *name;
const struct attribute_group **groups;
int (*uevent)(const struct device *dev, struct kobj_uevent_env *env);
- char *(*devnode)(struct device *dev, umode_t *mode,
+ char *(*devnode)(const struct device *dev, umode_t *mode,
kuid_t *uid, kgid_t *gid);
void (*release)(struct device *dev);
--
2.38.1
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