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.Dd August 16, 2021

.Dt GONE_IN 9

.Os

.Sh NAME

.Nm gone_in ,

.Nm gone_in_dev

.Nd deprecation notice functions

.Sh SYNOPSIS

.In sys/systm.h

.Ft void

.Fn gone_in "int major" "const char *msg"

.Ft void

.Fn gone_in_dev "device_t dev" "int major" "const char *msg"

.Sh DESCRIPTION

The

.Fn gone_in

functions are used to provide a notice that the kernel is using a driver or

some other functionality that is deprecated, and will be removed in a future

.Fx

release.

The notice is sent to the kernel

.Xr dmesg 8

log and will appear on the console.

The

.Fa major

argument specifies the major version of the

debdrupUnsubmitted

Done

.Fa major

- argument specifies the major version of the FreeBSD release that will remove

+ argument specifies the major version of the

+ .Fx

+ release that will remove

the deprecated functionality.

debdrup:

.Fx

release that will remove the deprecated functionality.

.Pp

In releases before

.Fa major

the deprecation notice states

.Do

debdrupUnsubmitted

Not Done

the deprecation notice states

.Do

- Deprecated code (to be removed in FreeBSD

+ Deprecated code (to be removed in

+ .Fx

.Fa major ):

debdrup:

emasteAuthorUnsubmitted

Done

I think this one probably should not change because it's literal console output.

emaste: I think this one probably should not change because it's literal console output.

Deprecated code (to be removed in FreeBSD

.Fa major Ns ):

emasteAuthorUnsubmitted

Done

Added Ns here

emaste: Added Ns here

.Fa msg

.Dc .

In releases equal to and after

.Fa major

the notice states

.Do

Obsolete code will be removed soon:

.Fa msg

.Dc .

.Sh EXAMPLES

.Bd -literal -offset indent

void

sample_init(void)

{

/* Initializaiton code omitted. */

impUnsubmitted

Not Done

11.x ABI compat isn't the headlining reason to retire, necessarily.
In the past this has been more like "Giant locked filesystem" or "Driver not migrated from old API" or simiar

imp: 11.x ABI compat isn't the headlining reason to retire, necessarily. In the past this has been…

emasteAuthorUnsubmitted

Done

This was copied from an in-tree one, but indeed "Giant locked filesystem" is probably a good canonical example

emaste: This was copied from an in-tree one, but indeed "Giant locked filesystem" is probably a good…

gone_in(14, "Giant-locked filesystem");

}

impUnsubmitted

Done

int

imp: int

int

example_driver_attach(struct example_driver_softc *sc)

{

impUnsubmitted

Not Done

This message needs to be more along the lines of "This hardware no longer relevant to FreeBSD" or "This wifi driver doesn't support FooBar crypto" or some other minimum bar.

imp: This message needs to be more along the lines of "This hardware no longer relevant to FreeBSD"…

emasteAuthorUnsubmitted

Done

Here's some examples from the tree, as they'd appear in dmesg:

Deprecated code (to be removed in FreeBSD 13): pccard removed, an doesn't support modern crypto
Deprecated code (to be removed in FreeBSD 13): pccard removed, an doesn't support modern crypto
Deprecated code (to be removed in FreeBSD 13): amr(4) driver
Deprecated code (to be removed in FreeBSD 13): FreeBSD 11.x ABI compat
Deprecated code (to be removed in FreeBSD 14): FreeBSD 12.x ABI compat
Deprecated code (to be removed in FreeBSD 13): drm2 drivers
Deprecated code (to be removed in FreeBSD 14): esp(4) driver
Deprecated code (to be removed in FreeBSD 14): PC Card to be removed
Deprecated code (to be removed in FreeBSD 14): mly(4) removed
prefixed with the device name/number for gone_in_dev of course

IMO something short like "ISA drivers", "obsolete hardware" etc. is what we should suggest

sys/dev/mly/mly.c
339: gone_in_dev(dev, 13, "");

sys/dev/twa/tw_osl_freebsd.c
416: gone_in_dev(dev, 13, "twa(4) removed");

sys/dev/iir/iir_pci.c
339: gone_in_dev(dev, 13, "iir(4) removed");

emaste: Here's some examples from the tree, as they'd appear in dmesg: Deprecated code (to be removed…

/* Attach code omitted. */

gone_in_dev(sc->dev, 14, "Giant-locked driver");

}

.Ed

.Sh HISTORY

The

impUnsubmitted

Done

imp: 11

.Nm

functions first appeared in

.Fx 11 .