driver core: make struct bus_type.uevent() take a const *

The uevent() callback in struct bus_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.

Acked-by: Rafael J. Wysocki <rafael@kernel.org>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20230111113018.459199-16-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

arch/mips/sgi-ip22/ip22-gio.c

@@ -199,9 +199,9 @@ static struct attribute *gio_dev_attrs[] = {
 };
 ATTRIBUTE_GROUPS(gio_dev);
 
-static int gio_device_uevent(struct device *dev, struct kobj_uevent_env *env)
+static int gio_device_uevent(const struct device *dev, struct kobj_uevent_env *env)
 {
-	struct gio_device *gio_dev = to_gio_device(dev);
+	const struct gio_device *gio_dev = to_gio_device(dev);
 
 	add_uevent_var(env, "MODALIAS=gio:%x", gio_dev->id.id);
 	return 0;

arch/parisc/kernel/drivers.c

@@ -552,7 +552,7 @@ static int parisc_generic_match(struct device *dev, struct device_driver *drv)
 	return match_device(to_parisc_driver(drv), to_parisc_device(dev));
 }
 
-static ssize_t make_modalias(struct device *dev, char *buf)
+static ssize_t make_modalias(const struct device *dev, char *buf)
 {
 	const struct parisc_device *padev = to_parisc_device(dev);
 	const struct parisc_device_id *id = &padev->id;
@@ -562,7 +562,7 @@ static ssize_t make_modalias(struct device *dev, char *buf)
 		(u32)id->sversion);
 }
 
-static int parisc_uevent(struct device *dev, struct kobj_uevent_env *env)
+static int parisc_uevent(const struct device *dev, struct kobj_uevent_env *env)
 {
 	const struct parisc_device *padev;
 	char modalias[40];

arch/powerpc/platforms/pseries/vio.c

@@ -1609,10 +1609,10 @@ static int vio_bus_match(struct device *dev, struct device_driver *drv)
 	return (ids != NULL) && (vio_match_device(ids, vio_dev) != NULL);
 }
 
-static int vio_hotplug(struct device *dev, struct kobj_uevent_env *env)
+static int vio_hotplug(const struct device *dev, struct kobj_uevent_env *env)
 {
 	const struct vio_dev *vio_dev = to_vio_dev(dev);
-	struct device_node *dn;
+	const struct device_node *dn;
 	const char *cp;
 
 	dn = dev->of_node;

arch/sparc/kernel/vio.c

@@ -46,7 +46,7 @@ static const struct vio_device_id *vio_match_device(
 	return NULL;
 }
 
-static int vio_hotplug(struct device *dev, struct kobj_uevent_env *env)
+static int vio_hotplug(const struct device *dev, struct kobj_uevent_env *env)
 {
 	const struct vio_dev *vio_dev = to_vio_dev(dev);
 

drivers/acpi/bus.c

@@ -1014,7 +1014,7 @@ static int acpi_bus_match(struct device *dev, struct device_driver *drv)
 		&& !acpi_match_device_ids(acpi_dev, acpi_drv->ids);
 }
 
-static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env)
+static int acpi_device_uevent(const struct device *dev, struct kobj_uevent_env *env)
 {
 	return __acpi_device_uevent_modalias(to_acpi_device(dev), env);
 }

drivers/amba/bus.c

@@ -235,9 +235,9 @@ static int amba_match(struct device *dev, struct device_driver *drv)
 	return amba_lookup(pcdrv->id_table, pcdev) != NULL;
 }
 
-static int amba_uevent(struct device *dev, struct kobj_uevent_env *env)
+static int amba_uevent(const struct device *dev, struct kobj_uevent_env *env)
 {
-	struct amba_device *pcdev = to_amba_device(dev);
+	const struct amba_device *pcdev = to_amba_device(dev);
 	int retval = 0;
 
 	retval = add_uevent_var(env, "AMBA_ID=%08x", pcdev->periphid);

drivers/base/auxiliary.c

@@ -185,7 +185,7 @@ static int auxiliary_match(struct device *dev, struct device_driver *drv)
 	return !!auxiliary_match_id(auxdrv->id_table, auxdev);
 }
 
-static int auxiliary_uevent(struct device *dev, struct kobj_uevent_env *env)
+static int auxiliary_uevent(const struct device *dev, struct kobj_uevent_env *env)
 {
 	const char *name, *p;
 

drivers/base/cpu.c

@@ -336,7 +336,7 @@ static ssize_t print_cpu_modalias(struct device *dev,
 	return len;
 }
 
-static int cpu_uevent(struct device *dev, struct kobj_uevent_env *env)
+static int cpu_uevent(const struct device *dev, struct kobj_uevent_env *env)
 {
 	char *buf = kzalloc(PAGE_SIZE, GFP_KERNEL);
 	if (buf) {

drivers/base/platform.c

@@ -1353,9 +1353,9 @@ static int platform_match(struct device *dev, struct device_driver *drv)
 	return (strcmp(pdev->name, drv->name) == 0);
 }
 
-static int platform_uevent(struct device *dev, struct kobj_uevent_env *env)
+static int platform_uevent(const struct device *dev, struct kobj_uevent_env *env)
 {
-	struct platform_device	*pdev = to_platform_device(dev);
+	const struct platform_device *pdev = to_platform_device(dev);
 	int rc;
 
 	/* Some devices have extra OF data and an OF-style MODALIAS */

drivers/bcma/main.c

@@ -28,7 +28,7 @@ static DEFINE_MUTEX(bcma_buses_mutex);
 static int bcma_bus_match(struct device *dev, struct device_driver *drv);
 static int bcma_device_probe(struct device *dev);
 static void bcma_device_remove(struct device *dev);
-static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env);
+static int bcma_device_uevent(const struct device *dev, struct kobj_uevent_env *env);
 
 static ssize_t manuf_show(struct device *dev, struct device_attribute *attr, char *buf)
 {
@@ -627,9 +627,9 @@ static void bcma_device_remove(struct device *dev)
 	put_device(dev);
 }
 
-static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env)
+static int bcma_device_uevent(const struct device *dev, struct kobj_uevent_env *env)
 {
-	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
+	const struct bcma_device *core = container_of_const(dev, struct bcma_device, dev);
 
 	return add_uevent_var(env,
 			      "MODALIAS=bcma:m%04Xid%04Xrev%02Xcl%02X",

drivers/bus/fsl-mc/fsl-mc-bus.c

@@ -124,9 +124,9 @@ out:
 /*
  * fsl_mc_bus_uevent - callback invoked when a device is added
  */
-static int fsl_mc_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
+static int fsl_mc_bus_uevent(const struct device *dev, struct kobj_uevent_env *env)
 {
-	struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev);
+	const struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev);
 
 	if (add_uevent_var(env, "MODALIAS=fsl-mc:v%08Xd%s",
 			   mc_dev->obj_desc.vendor,

drivers/bus/mhi/ep/main.c

@@ -1543,9 +1543,9 @@ void mhi_ep_driver_unregister(struct mhi_ep_driver *mhi_drv)
 }
 EXPORT_SYMBOL_GPL(mhi_ep_driver_unregister);
 
-static int mhi_ep_uevent(struct device *dev, struct kobj_uevent_env *env)
+static int mhi_ep_uevent(const struct device *dev, struct kobj_uevent_env *env)
 {
-	struct mhi_ep_device *mhi_dev = to_mhi_ep_device(dev);
+	const struct mhi_ep_device *mhi_dev = to_mhi_ep_device(dev);
 
 	return add_uevent_var(env, "MODALIAS=" MHI_EP_DEVICE_MODALIAS_FMT,
 					mhi_dev->name);

drivers/bus/mhi/host/init.c

@@ -1395,9 +1395,9 @@ void mhi_driver_unregister(struct mhi_driver *mhi_drv)
 }
 EXPORT_SYMBOL_GPL(mhi_driver_unregister);
 
-static int mhi_uevent(struct device *dev, struct kobj_uevent_env *env)
+static int mhi_uevent(const struct device *dev, struct kobj_uevent_env *env)
 {
-	struct mhi_device *mhi_dev = to_mhi_device(dev);
+	const struct mhi_device *mhi_dev = to_mhi_device(dev);
 
 	return add_uevent_var(env, "MODALIAS=" MHI_DEVICE_MODALIAS_FMT,
 					mhi_dev->name);

drivers/bus/mips_cdmm.c

@@ -67,9 +67,9 @@ static int mips_cdmm_match(struct device *dev, struct device_driver *drv)
 	return mips_cdmm_lookup(cdrv->id_table, cdev) != NULL;
 }
 
-static int mips_cdmm_uevent(struct device *dev, struct kobj_uevent_env *env)
+static int mips_cdmm_uevent(const struct device *dev, struct kobj_uevent_env *env)
 {
-	struct mips_cdmm_device *cdev = to_mips_cdmm_device(dev);
+	const struct mips_cdmm_device *cdev = to_mips_cdmm_device(dev);
 	int retval = 0;
 
 	retval = add_uevent_var(env, "CDMM_CPU=%u", cdev->cpu);

drivers/bus/sunxi-rsb.c

@@ -172,7 +172,7 @@ static void sunxi_rsb_device_remove(struct device *dev)
 	drv->remove(to_sunxi_rsb_device(dev));
 }
 
-static int sunxi_rsb_device_modalias(struct device *dev, struct kobj_uevent_env *env)
+static int sunxi_rsb_device_modalias(const struct device *dev, struct kobj_uevent_env *env)
 {
 	return of_device_uevent_modalias(dev, env);
 }

drivers/cxl/core/memdev.c

@@ -162,7 +162,7 @@ static const struct device_type cxl_memdev_type = {
 	.groups = cxl_memdev_attribute_groups,
 };
 
-bool is_cxl_memdev(struct device *dev)
+bool is_cxl_memdev(const struct device *dev)
 {
 	return dev->type == &cxl_memdev_type;
 }

drivers/cxl/core/port.c

@@ -38,7 +38,7 @@ static ssize_t devtype_show(struct device *dev, struct device_attribute *attr,
 }
 static DEVICE_ATTR_RO(devtype);
 
-static int cxl_device_id(struct device *dev)
+static int cxl_device_id(const struct device *dev)
 {
 	if (dev->type == &cxl_nvdimm_bridge_type)
 		return CXL_DEVICE_NVDIMM_BRIDGE;
@@ -523,13 +523,13 @@ static const struct device_type cxl_port_type = {
 	.groups = cxl_port_attribute_groups,
 };
 
-bool is_cxl_port(struct device *dev)
+bool is_cxl_port(const struct device *dev)
 {
 	return dev->type == &cxl_port_type;
 }
 EXPORT_SYMBOL_NS_GPL(is_cxl_port, CXL);
 
-struct cxl_port *to_cxl_port(struct device *dev)
+struct cxl_port *to_cxl_port(const struct device *dev)
 {
 	if (dev_WARN_ONCE(dev, dev->type != &cxl_port_type,
 			  "not a cxl_port device\n"))
@@ -1826,7 +1826,7 @@ void cxl_driver_unregister(struct cxl_driver *cxl_drv)
 }
 EXPORT_SYMBOL_NS_GPL(cxl_driver_unregister, CXL);
 
-static int cxl_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
+static int cxl_bus_uevent(const struct device *dev, struct kobj_uevent_env *env)
 {
 	return add_uevent_var(env, "MODALIAS=" CXL_MODALIAS_FMT,
 			      cxl_device_id(dev));

drivers/cxl/cxl.h

@@ -588,8 +588,8 @@ static inline bool is_cxl_root(struct cxl_port *port)
 	return port->uport == port->dev.parent;
 }
 
-bool is_cxl_port(struct device *dev);
-struct cxl_port *to_cxl_port(struct device *dev);
+bool is_cxl_port(const struct device *dev);
+struct cxl_port *to_cxl_port(const struct device *dev);
 struct pci_bus;
 int devm_cxl_register_pci_bus(struct device *host, struct device *uport,
 			      struct pci_bus *bus);

drivers/cxl/cxlmem.h

@@ -72,7 +72,7 @@ cxled_to_memdev(struct cxl_endpoint_decoder *cxled)
 	return to_cxl_memdev(port->uport);
 }
 
-bool is_cxl_memdev(struct device *dev);
+bool is_cxl_memdev(const struct device *dev);
 static inline bool is_cxl_endpoint(struct cxl_port *port)
 {
 	return is_cxl_memdev(port->uport);

drivers/dax/bus.c

@@ -18,7 +18,7 @@ struct dax_id {
 	char dev_name[DAX_NAME_LEN];
 };
 
-static int dax_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
+static int dax_bus_uevent(const struct device *dev, struct kobj_uevent_env *env)
 {
 	/*
 	 * We only ever expect to handle device-dax instances, i.e. the