Re: [PATCH 1/5] driver core: make struct class.dev_uevent() take a const *

From: Sebastian Reichel
Date: Thu Nov 24 2022 - 10:03:41 EST

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Hi,

On Wed, Nov 23, 2022 at 01:25:19PM +0100, Greg Kroah-Hartman wrote:
> The dev_uevent() in struct class 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@xxxxxxxxx>
> Cc: Luis Chamberlain <mcgrof@xxxxxxxxxx>
> Cc: Russ Weight <russell.h.weight@xxxxxxxxx>
> Cc: "Rafael J. Wysocki" <rafael@xxxxxxxxxx>
> Cc: Jean Delvare <jdelvare@xxxxxxxx>
> Cc: Johan Hovold <johan@xxxxxxxxxx>
> Cc: Jason Gunthorpe <jgg@xxxxxxxx>
> Cc: Leon Romanovsky <leon@xxxxxxxxxx>
> Cc: Karsten Keil <isdn@xxxxxxxxxxxxxx>
> Cc: Mauro Carvalho Chehab <mchehab@xxxxxxxxxx>
> Cc: Keith Busch <kbusch@xxxxxxxxxx>
> Cc: Christoph Hellwig <hch@xxxxxx>
> Cc: Sagi Grimberg <sagi@xxxxxxxxxxx>
> Cc: Dominik Brodowski <linux@xxxxxxxxxxxxxxxxxxxx>
> Cc: Sebastian Reichel <sre@xxxxxxxxxx>
> Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
> Cc: Eric Dumazet <edumazet@xxxxxxxxxx>
> Cc: Jakub Kicinski <kuba@xxxxxxxxxx>
> Cc: Paolo Abeni <pabeni@xxxxxxxxxx>
> Cc: Johannes Berg <johannes@xxxxxxxxxxxxxxxx>
> Cc: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>
> Cc: Raed Salem <raeds@xxxxxxxxxx>
> Cc: Chen Zhongjin <chenzhongjin@xxxxxxxxxx>
> Cc: Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx>
> Cc: Avihai Horon <avihaih@xxxxxxxxxx>
> Cc: "Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx>
> Cc: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
> Cc: Colin Ian King <colin.i.king@xxxxxxxxx>
> Cc: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
> Cc: Jakob Koschel <jakobkoschel@xxxxxxxxx>
> Cc: Antoine Tenart <atenart@xxxxxxxxxx>
> Cc: Frederic Weisbecker <frederic@xxxxxxxxxx>
> Cc: Wang Yufen <wangyufen@xxxxxxxxxx>
> Cc: linux-block@xxxxxxxxxxxxxxx
> Cc: linux-kernel@xxxxxxxxxxxxxxx
> Cc: linux-media@xxxxxxxxxxxxxxx
> Cc: linux-nvme@xxxxxxxxxxxxxxxxxxx
> Cc: linux-pm@xxxxxxxxxxxxxxx
> Cc: linux-rdma@xxxxxxxxxxxxxxx
> Cc: linux-usb@xxxxxxxxxxxxxxx
> Cc: linux-wireless@xxxxxxxxxxxxxxx
> Cc: netdev@xxxxxxxxxxxxxxx
> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> ---

Acked-by: Sebastian Reichel <sre@xxxxxxxxxx>

-- Sebastian

> block/genhd.c | 4 ++--
> drivers/base/firmware_loader/sysfs.c | 6 +++---
> drivers/base/firmware_loader/sysfs.h | 2 +-
> drivers/firmware/dmi-id.c | 2 +-
> drivers/gnss/core.c | 6 +++---
> drivers/infiniband/core/device.c | 2 +-
> drivers/isdn/mISDN/core.c | 4 ++--
> drivers/media/dvb-core/dvbdev.c | 4 ++--
> drivers/nvme/host/core.c | 4 ++--
> drivers/pcmcia/cs.c | 4 ++--
> drivers/power/supply/power_supply.h | 2 +-
> drivers/power/supply/power_supply_sysfs.c | 8 ++++----
> drivers/usb/gadget/udc/core.c | 4 ++--
> include/linux/device/class.h | 2 +-
> include/linux/mISDNif.h | 2 +-
> net/atm/atm_sysfs.c | 4 ++--
> net/core/net-sysfs.c | 4 ++--
> net/rfkill/core.c | 2 +-
> 18 files changed, 33 insertions(+), 33 deletions(-)
>
> diff --git a/block/genhd.c b/block/genhd.c
> index 0f9769db2de8..3f1124713442 100644
> --- a/block/genhd.c
> +++ b/block/genhd.c
> @@ -1181,9 +1181,9 @@ static void disk_release(struct device *dev)
> iput(disk->part0->bd_inode); /* frees the disk */
> }
>
> -static int block_uevent(struct device *dev, struct kobj_uevent_env *env)
> +static int block_uevent(const struct device *dev, struct kobj_uevent_env *env)
> {
> - struct gendisk *disk = dev_to_disk(dev);
> + const struct gendisk *disk = dev_to_disk(dev);
>
> return add_uevent_var(env, "DISKSEQ=%llu", disk->diskseq);
> }
> diff --git a/drivers/base/firmware_loader/sysfs.c b/drivers/base/firmware_loader/sysfs.c
> index 5b66b3d1fa16..56911d75b90a 100644
> --- a/drivers/base/firmware_loader/sysfs.c
> +++ b/drivers/base/firmware_loader/sysfs.c
> @@ -64,7 +64,7 @@ static struct attribute *firmware_class_attrs[] = {
> };
> ATTRIBUTE_GROUPS(firmware_class);
>
> -static int do_firmware_uevent(struct fw_sysfs *fw_sysfs, struct kobj_uevent_env *env)
> +static int do_firmware_uevent(const struct fw_sysfs *fw_sysfs, struct kobj_uevent_env *env)
> {
> if (add_uevent_var(env, "FIRMWARE=%s", fw_sysfs->fw_priv->fw_name))
> return -ENOMEM;
> @@ -76,9 +76,9 @@ static int do_firmware_uevent(struct fw_sysfs *fw_sysfs, struct kobj_uevent_env
> return 0;
> }
>
> -static int firmware_uevent(struct device *dev, struct kobj_uevent_env *env)
> +static int firmware_uevent(const struct device *dev, struct kobj_uevent_env *env)
> {
> - struct fw_sysfs *fw_sysfs = to_fw_sysfs(dev);
> + const struct fw_sysfs *fw_sysfs = to_fw_sysfs(dev);
> int err = 0;
>
> mutex_lock(&fw_lock);
> diff --git a/drivers/base/firmware_loader/sysfs.h b/drivers/base/firmware_loader/sysfs.h
> index df1d5add698f..fd0b4ad9bdbb 100644
> --- a/drivers/base/firmware_loader/sysfs.h
> +++ b/drivers/base/firmware_loader/sysfs.h
> @@ -81,7 +81,7 @@ struct fw_sysfs {
> void *fw_upload_priv;
> };
>
> -static inline struct fw_sysfs *to_fw_sysfs(struct device *dev)
> +static inline struct fw_sysfs *to_fw_sysfs(const struct device *dev)
> {
> return container_of(dev, struct fw_sysfs, dev);
> }
> diff --git a/drivers/firmware/dmi-id.c b/drivers/firmware/dmi-id.c
> index 940ddf916202..5f3a3e913d28 100644
> --- a/drivers/firmware/dmi-id.c
> +++ b/drivers/firmware/dmi-id.c
> @@ -155,7 +155,7 @@ static const struct attribute_group* sys_dmi_attribute_groups[] = {
> NULL
> };
>
> -static int dmi_dev_uevent(struct device *dev, struct kobj_uevent_env *env)
> +static int dmi_dev_uevent(const struct device *dev, struct kobj_uevent_env *env)
> {
> ssize_t len;
>
> diff --git a/drivers/gnss/core.c b/drivers/gnss/core.c
> index 1e82b7967570..77a4b280c552 100644
> --- a/drivers/gnss/core.c
> +++ b/drivers/gnss/core.c
> @@ -337,7 +337,7 @@ static const char * const gnss_type_names[GNSS_TYPE_COUNT] = {
> [GNSS_TYPE_MTK] = "MTK",
> };
>
> -static const char *gnss_type_name(struct gnss_device *gdev)
> +static const char *gnss_type_name(const struct gnss_device *gdev)
> {
> const char *name = NULL;
>
> @@ -365,9 +365,9 @@ static struct attribute *gnss_attrs[] = {
> };
> ATTRIBUTE_GROUPS(gnss);
>
> -static int gnss_uevent(struct device *dev, struct kobj_uevent_env *env)
> +static int gnss_uevent(const struct device *dev, struct kobj_uevent_env *env)
> {
> - struct gnss_device *gdev = to_gnss_device(dev);
> + const struct gnss_device *gdev = to_gnss_device(dev);
> int ret;
>
> ret = add_uevent_var(env, "GNSS_TYPE=%s", gnss_type_name(gdev));
> diff --git a/drivers/infiniband/core/device.c b/drivers/infiniband/core/device.c
> index fa65c5d3d395..4186dbf9377f 100644
> --- a/drivers/infiniband/core/device.c
> +++ b/drivers/infiniband/core/device.c
> @@ -511,7 +511,7 @@ static void ib_device_release(struct device *device)
> kfree_rcu(dev, rcu_head);
> }
>
> -static int ib_device_uevent(struct device *device,
> +static int ib_device_uevent(const struct device *device,
> struct kobj_uevent_env *env)
> {
> if (add_uevent_var(env, "NAME=%s", dev_name(device)))
> diff --git a/drivers/isdn/mISDN/core.c b/drivers/isdn/mISDN/core.c
> index 90ee56d07a6e..9120be590325 100644
> --- a/drivers/isdn/mISDN/core.c
> +++ b/drivers/isdn/mISDN/core.c
> @@ -139,9 +139,9 @@ static struct attribute *mISDN_attrs[] = {
> };
> ATTRIBUTE_GROUPS(mISDN);
>
> -static int mISDN_uevent(struct device *dev, struct kobj_uevent_env *env)
> +static int mISDN_uevent(const struct device *dev, struct kobj_uevent_env *env)
> {
> - struct mISDNdevice *mdev = dev_to_mISDN(dev);
> + const struct mISDNdevice *mdev = dev_to_mISDN(dev);
>
> if (!mdev)
> return 0;
> diff --git a/drivers/media/dvb-core/dvbdev.c b/drivers/media/dvb-core/dvbdev.c
> index 675d877a67b2..6ef18bab9648 100644
> --- a/drivers/media/dvb-core/dvbdev.c
> +++ b/drivers/media/dvb-core/dvbdev.c
> @@ -1008,9 +1008,9 @@ void dvb_module_release(struct i2c_client *client)
> EXPORT_SYMBOL_GPL(dvb_module_release);
> #endif
>
> -static int dvb_uevent(struct device *dev, struct kobj_uevent_env *env)
> +static int dvb_uevent(const struct device *dev, struct kobj_uevent_env *env)
> {
> - struct dvb_device *dvbdev = dev_get_drvdata(dev);
> + const struct dvb_device *dvbdev = dev_get_drvdata(dev);
>
> add_uevent_var(env, "DVB_ADAPTER_NUM=%d", dvbdev->adapter->num);
> add_uevent_var(env, "DVB_DEVICE_TYPE=%s", dnames[dvbdev->type]);
> diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
> index da55ce45ac70..b4778b970dd4 100644
> --- a/drivers/nvme/host/core.c
> +++ b/drivers/nvme/host/core.c
> @@ -4580,9 +4580,9 @@ void nvme_remove_namespaces(struct nvme_ctrl *ctrl)
> }
> EXPORT_SYMBOL_GPL(nvme_remove_namespaces);
>
> -static int nvme_class_uevent(struct device *dev, struct kobj_uevent_env *env)
> +static int nvme_class_uevent(const struct device *dev, struct kobj_uevent_env *env)
> {
> - struct nvme_ctrl *ctrl =
> + const struct nvme_ctrl *ctrl =
> container_of(dev, struct nvme_ctrl, ctrl_device);
> struct nvmf_ctrl_options *opts = ctrl->opts;
> int ret;
> diff --git a/drivers/pcmcia/cs.c b/drivers/pcmcia/cs.c
> index f70197154a36..e3224e49c43f 100644
> --- a/drivers/pcmcia/cs.c
> +++ b/drivers/pcmcia/cs.c
> @@ -810,10 +810,10 @@ int pcmcia_reset_card(struct pcmcia_socket *skt)
> EXPORT_SYMBOL(pcmcia_reset_card);
>
>
> -static int pcmcia_socket_uevent(struct device *dev,
> +static int pcmcia_socket_uevent(const struct device *dev,
> struct kobj_uevent_env *env)
> {
> - struct pcmcia_socket *s = container_of(dev, struct pcmcia_socket, dev);
> + const struct pcmcia_socket *s = container_of(dev, struct pcmcia_socket, dev);
>
> if (add_uevent_var(env, "SOCKET_NO=%u", s->sock))
> return -ENOMEM;
> diff --git a/drivers/power/supply/power_supply.h b/drivers/power/supply/power_supply.h
> index c310d4f36c10..645eee4d6b6a 100644
> --- a/drivers/power/supply/power_supply.h
> +++ b/drivers/power/supply/power_supply.h
> @@ -16,7 +16,7 @@ struct power_supply;
> #ifdef CONFIG_SYSFS
>
> extern void power_supply_init_attrs(struct device_type *dev_type);
> -extern int power_supply_uevent(struct device *dev, struct kobj_uevent_env *env);
> +extern int power_supply_uevent(const struct device *dev, struct kobj_uevent_env *env);
>
> #else
>
> diff --git a/drivers/power/supply/power_supply_sysfs.c b/drivers/power/supply/power_supply_sysfs.c
> index 5369abaceb5c..6ca7d3985a40 100644
> --- a/drivers/power/supply/power_supply_sysfs.c
> +++ b/drivers/power/supply/power_supply_sysfs.c
> @@ -427,7 +427,7 @@ void power_supply_init_attrs(struct device_type *dev_type)
> }
> }
>
> -static int add_prop_uevent(struct device *dev, struct kobj_uevent_env *env,
> +static int add_prop_uevent(const struct device *dev, struct kobj_uevent_env *env,
> enum power_supply_property prop, char *prop_buf)
> {
> int ret = 0;
> @@ -438,7 +438,7 @@ static int add_prop_uevent(struct device *dev, struct kobj_uevent_env *env,
> pwr_attr = &power_supply_attrs[prop];
> dev_attr = &pwr_attr->dev_attr;
>
> - ret = power_supply_show_property(dev, dev_attr, prop_buf);
> + ret = power_supply_show_property((struct device *)dev, dev_attr, prop_buf);
> if (ret == -ENODEV || ret == -ENODATA) {
> /*
> * When a battery is absent, we expect -ENODEV. Don't abort;
> @@ -458,9 +458,9 @@ static int add_prop_uevent(struct device *dev, struct kobj_uevent_env *env,
> pwr_attr->prop_name, prop_buf);
> }
>
> -int power_supply_uevent(struct device *dev, struct kobj_uevent_env *env)
> +int power_supply_uevent(const struct device *dev, struct kobj_uevent_env *env)
> {
> - struct power_supply *psy = dev_get_drvdata(dev);
> + const struct power_supply *psy = dev_get_drvdata(dev);
> int ret = 0, j;
> char *prop_buf;
>
> diff --git a/drivers/usb/gadget/udc/core.c b/drivers/usb/gadget/udc/core.c
> index c63c0c2cf649..b5994a0604f6 100644
> --- a/drivers/usb/gadget/udc/core.c
> +++ b/drivers/usb/gadget/udc/core.c
> @@ -1723,9 +1723,9 @@ static const struct attribute_group *usb_udc_attr_groups[] = {
> NULL,
> };
>
> -static int usb_udc_uevent(struct device *dev, struct kobj_uevent_env *env)
> +static int usb_udc_uevent(const struct device *dev, struct kobj_uevent_env *env)
> {
> - struct usb_udc *udc = container_of(dev, struct usb_udc, dev);
> + const struct usb_udc *udc = container_of(dev, struct usb_udc, dev);
> int ret;
>
> ret = add_uevent_var(env, "USB_UDC_NAME=%s", udc->gadget->name);
> diff --git a/include/linux/device/class.h b/include/linux/device/class.h
> index 20103e0b03c3..94b1107258e5 100644
> --- a/include/linux/device/class.h
> +++ b/include/linux/device/class.h
> @@ -59,7 +59,7 @@ struct class {
> const struct attribute_group **dev_groups;
> struct kobject *dev_kobj;
>
> - int (*dev_uevent)(struct device *dev, struct kobj_uevent_env *env);
> + int (*dev_uevent)(const struct device *dev, struct kobj_uevent_env *env);
> char *(*devnode)(struct device *dev, umode_t *mode);
>
> void (*class_release)(struct class *class);
> diff --git a/include/linux/mISDNif.h b/include/linux/mISDNif.h
> index 7dd1f01ec4f9..7aab4a769736 100644
> --- a/include/linux/mISDNif.h
> +++ b/include/linux/mISDNif.h
> @@ -586,7 +586,7 @@ extern struct mISDNclock *mISDN_register_clock(char *, int, clockctl_func_t *,
> void *);
> extern void mISDN_unregister_clock(struct mISDNclock *);
>
> -static inline struct mISDNdevice *dev_to_mISDN(struct device *dev)
> +static inline struct mISDNdevice *dev_to_mISDN(const struct device *dev)
> {
> if (dev)
> return dev_get_drvdata(dev);
> diff --git a/net/atm/atm_sysfs.c b/net/atm/atm_sysfs.c
> index 0fdbdfd19474..466353b3dde4 100644
> --- a/net/atm/atm_sysfs.c
> +++ b/net/atm/atm_sysfs.c
> @@ -108,9 +108,9 @@ static struct device_attribute *atm_attrs[] = {
> };
>
>
> -static int atm_uevent(struct device *cdev, struct kobj_uevent_env *env)
> +static int atm_uevent(const struct device *cdev, struct kobj_uevent_env *env)
> {
> - struct atm_dev *adev;
> + const struct atm_dev *adev;
>
> if (!cdev)
> return -ENODEV;
> diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
> index 9cfc80b8ed25..03a61d1dffbd 100644
> --- a/net/core/net-sysfs.c
> +++ b/net/core/net-sysfs.c
> @@ -1873,9 +1873,9 @@ const struct kobj_ns_type_operations net_ns_type_operations = {
> };
> EXPORT_SYMBOL_GPL(net_ns_type_operations);
>
> -static int netdev_uevent(struct device *d, struct kobj_uevent_env *env)
> +static int netdev_uevent(const struct device *d, struct kobj_uevent_env *env)
> {
> - struct net_device *dev = to_net_dev(d);
> + const struct net_device *dev = to_net_dev(d);
> int retval;
>
> /* pass interface to uevent. */
> diff --git a/net/rfkill/core.c b/net/rfkill/core.c
> index dac4fdc7488a..b390ff245d5e 100644
> --- a/net/rfkill/core.c
> +++ b/net/rfkill/core.c
> @@ -832,7 +832,7 @@ static void rfkill_release(struct device *dev)
> kfree(rfkill);
> }
>
> -static int rfkill_dev_uevent(struct device *dev, struct kobj_uevent_env *env)
> +static int rfkill_dev_uevent(const struct device *dev, struct kobj_uevent_env *env)
> {
> struct rfkill *rfkill = to_rfkill(dev);
> unsigned long flags;
> --
> 2.38.1
>

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