[PATCH v2 00/16] driver core: make more things const!

From: Greg Kroah-Hartman
Date: Wed Jan 11 2023 - 06:31:06 EST

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Here's an updated version of this original series:
https://lore.kernel.org/all/20221123122523.1332370-1-gregkh@xxxxxxxxxxxxxxxxxxx/
that has the goal of making more functions in the driver core take const
pointers as they do not actually modify anything. This work is an
outgrowth of some conversations I had with the Linux Rust developers
talking about the mutability of many of the driver model pointers.

A small subset of the original submission is now in 6.2-rc1 and this
series is an outgrown of the original submission in that many things are
now changed and a bit more explicit than before.

I can take all of these through the driver-core git tree as they depend
on each other. 0-day has been passing on this series for quite a while,
so all should be good unless some subsystem trees have added new busses
without me noticing.

Bonus for all of this work, the overall code size of the kernel actually
decreased a tiny bit:
126 files changed, 283 insertions(+), 309 deletions(-)
while adding a lot more type-safeness to the system.

Changes from v1:
- rebased on 6.2-rc1 and dropped accepted patches already in there.
- container_of_const() is now in 6.2-rc1 so use that in many
individual subsystems to make the follow-on changes in the driver
core more obvious.
- collected some Reviewed-by
- of_device_uevent_modalias was being "abused" by many different
subsystems in using it instead of a local bus function which played
havoc when enabling stricter type-checking. Move that out into a
new function for the busses that were doing this to make it more
obvious what they need here.

Greg Kroah-Hartman (16):
of: device: make of_device_uevent_modalias() take a const device *
i3c: move dev_to_i3cdev() to use container_of_const()
platform/surface: aggregator: move to_ssam_device() to use
container_of_const()
firewire: move fw_device() and fw_unit() to use container_of_const()
driver core: make struct device_type.uevent() take a const *
driver core: make struct device_type.devnode() take a const *
driver core: device_get_devnode() should take a const *
vio: move to_vio_dev() to use container_of_const()
platform/x86: wmi: move dev_to_wblock() and dev_to_wdev to use
container_of_const()
drivers: hv: move device_to_hv_device to use container_of_const()
virtio: move dev_to_virtio() to use container_of_const()
drm/mipi-dsi: move to_mipi_dsi_device() to use container_of_const()
mcb: move to_mcb_device() to use container_of_const()
xen/xenbus: move to_xenbus_device() to use container_of_const()
driver core: make struct bus_type.uevent() take a const *
kobject: kset_uevent_ops: make uevent() callback take a const *

arch/mips/sgi-ip22/ip22-gio.c | 4 ++--
arch/parisc/kernel/drivers.c | 4 ++--
arch/powerpc/include/asm/vio.h | 5 +----
arch/powerpc/platforms/pseries/ibmebus.c | 7 ++++++-
arch/powerpc/platforms/pseries/vio.c | 4 ++--
arch/sparc/include/asm/vio.h | 5 +----
arch/sparc/kernel/vio.c | 2 +-
block/genhd.c | 2 +-
block/partitions/core.c | 4 ++--
drivers/acpi/bus.c | 2 +-
drivers/acpi/device_sysfs.c | 8 ++++----
drivers/acpi/internal.h | 2 +-
drivers/amba/bus.c | 4 ++--
drivers/base/auxiliary.c | 2 +-
drivers/base/base.h | 2 ++
drivers/base/core.c | 6 +++---
drivers/base/cpu.c | 2 +-
drivers/base/platform.c | 4 ++--
drivers/bcma/main.c | 6 +++---
drivers/bus/fsl-mc/fsl-mc-bus.c | 4 ++--
drivers/bus/mhi/ep/main.c | 4 ++--
drivers/bus/mhi/host/init.c | 4 ++--
drivers/bus/mips_cdmm.c | 4 ++--
drivers/bus/sunxi-rsb.c | 7 ++++++-
drivers/cxl/core/memdev.c | 4 ++--
drivers/cxl/core/port.c | 8 ++++----
drivers/cxl/cxl.h | 4 ++--
drivers/cxl/cxlmem.h | 2 +-
drivers/dax/bus.c | 2 +-
drivers/eisa/eisa-bus.c | 4 ++--
drivers/firewire/core-device.c | 8 ++++----
drivers/firmware/arm_ffa/bus.c | 4 ++--
drivers/fpga/dfl.c | 4 ++--
drivers/fsi/fsi-core.c | 6 +++---
drivers/gpu/drm/display/drm_dp_aux_bus.c | 7 ++++++-
drivers/gpu/drm/drm_mipi_dsi.c | 4 ++--
drivers/gpu/host1x/bus.c | 2 +-
drivers/greybus/core.c | 14 +++++++-------
drivers/hid/hid-core.c | 4 ++--
drivers/hid/intel-ish-hid/ishtp/bus.c | 2 +-
drivers/hsi/hsi_core.c | 2 +-
drivers/hv/vmbus_drv.c | 4 ++--
drivers/hwtracing/intel_th/core.c | 6 +++---
drivers/hwtracing/intel_th/intel_th.h | 4 ++--
drivers/i2c/i2c-core-base.c | 4 ++--
drivers/i3c/device.c | 14 +-------------
drivers/i3c/master.c | 4 ++--
drivers/input/input.c | 16 ++++++++--------
drivers/input/serio/serio.c | 4 ++--
drivers/ipack/ipack.c | 4 ++--
drivers/macintosh/macio_asic.c | 7 ++++++-
drivers/mcb/mcb-core.c | 4 ++--
drivers/media/rc/rc-main.c | 2 +-
drivers/memstick/core/memstick.c | 6 +++---
drivers/misc/mei/bus.c | 4 ++--
drivers/misc/tifm_core.c | 4 ++--
drivers/mmc/core/bus.c | 4 ++--
drivers/mmc/core/sdio_bus.c | 4 ++--
drivers/net/phy/mdio_bus.c | 2 +-
drivers/net/xen-netback/xenbus.c | 2 +-
drivers/nvdimm/bus.c | 4 ++--
drivers/nvdimm/dax_devs.c | 2 +-
drivers/nvdimm/dimm_devs.c | 2 +-
drivers/nvdimm/nd-core.h | 10 +++++-----
drivers/nvdimm/nd.h | 4 ++--
drivers/nvdimm/region_devs.c | 4 ++--
drivers/of/device.c | 4 ++--
drivers/pci/pci-driver.c | 4 ++--
drivers/pcmcia/ds.c | 4 ++--
drivers/platform/surface/aggregator/bus.c | 4 ++--
drivers/platform/x86/wmi.c | 15 ++++-----------
drivers/rapidio/rio-driver.c | 4 ++--
drivers/rpmsg/rpmsg_core.c | 4 ++--
drivers/s390/cio/css.c | 4 ++--
drivers/s390/cio/device.c | 8 ++++----
drivers/s390/cio/scm.c | 2 +-
drivers/s390/crypto/ap_bus.c | 4 ++--
drivers/scsi/scsi_sysfs.c | 4 ++--
drivers/slimbus/core.c | 4 ++--
drivers/soc/qcom/apr.c | 4 ++--
drivers/soundwire/bus_type.c | 4 ++--
drivers/spi/spi.c | 2 +-
drivers/spmi/spmi.c | 2 +-
drivers/ssb/main.c | 4 ++--
drivers/staging/greybus/gbphy.c | 14 +++++++-------
drivers/tee/tee_core.c | 2 +-
drivers/thunderbolt/switch.c | 4 ++--
drivers/thunderbolt/tb.h | 2 +-
drivers/thunderbolt/xdomain.c | 6 +++---
drivers/tty/serdev/core.c | 2 +-
drivers/usb/common/ulpi.c | 4 ++--
drivers/usb/core/driver.c | 6 +++---
drivers/usb/core/message.c | 8 ++++----
drivers/usb/core/usb.c | 8 ++++----
drivers/usb/phy/phy.c | 6 +++---
drivers/usb/roles/class.c | 3 +--
drivers/usb/typec/bus.c | 4 ++--
drivers/usb/typec/class.c | 2 +-
drivers/virtio/virtio.c | 4 ++--
drivers/w1/w1.c | 10 +++++-----
drivers/xen/pvcalls-back.c | 2 +-
drivers/xen/xenbus/xenbus_probe_backend.c | 8 ++++----
drivers/xen/xenbus/xenbus_probe_frontend.c | 4 ++--
drivers/zorro/zorro-driver.c | 4 ++--
fs/dlm/lockspace.c | 4 ++--
fs/gfs2/sys.c | 6 +++---
include/drm/drm_mipi_dsi.h | 5 +----
include/linux/acpi.h | 4 ++--
include/linux/device.h | 6 ++----
include/linux/device/bus.h | 2 +-
include/linux/firewire.h | 15 +++------------
include/linux/hyperv.h | 5 +----
include/linux/i3c/device.h | 11 +++++++++--
include/linux/kobject.h | 2 +-
include/linux/mcb.h | 5 +----
include/linux/of_device.h | 4 ++--
include/linux/soundwire/sdw_type.h | 2 +-
include/linux/spi/spi.h | 2 +-
include/linux/ssb/ssb.h | 2 +-
include/linux/surface_aggregator/device.h | 5 +----
include/linux/virtio.h | 5 +----
include/sound/hdaudio.h | 2 +-
include/xen/xenbus.h | 7 ++-----
sound/aoa/soundbus/core.c | 6 +++---
sound/hda/hda_bus_type.c | 2 +-
sound/hda/hdac_device.c | 2 +-
126 files changed, 283 insertions(+), 309 deletions(-)

--
2.39.0

Next message: Russell King (Oracle): "Re: [PATCH v2] filelock: move file locking definitions to separate header file"
Previous message: Florian Weimer: "rseq CPU ID not correct on 6.0 kernels for pinned threads"
Next in thread: Greg Kroah-Hartman: "[PATCH v2 01/16] of: device: make of_device_uevent_modalias() take a const device *"
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