src/sys/kern/kern_conf.c, branch releng/14.0

Giant: Postpone removal of Giant-locked drivers until 15

2023-11-02T04:29:54+00:00

Reviewed by:	imp
Approved by:	re (karels)
MFC after:	1 day
Differential Revision:	https://reviews.freebsd.org/D42401

(cherry picked from commit a8bd34bfc0db38c1c11e9c36b7dd849d607c17a8)
(cherry picked from commit 5019a5acc5b01804e9dccd3796e9e0ea7c82ba90)

sys: Remove $FreeBSD$: one-line .c pattern

2023-08-16T17:54:36+00:00

Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/

spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD

2023-05-12T16:44:03+00:00

The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch
up to that fact and revert to their recommended match of BSD-2-Clause.

Discussed with:		pfg
MFC After:		3 days
Sponsored by:		Netflix

Retire clone_drain_lock

2022-08-20T09:44:05+00:00

It is only ever xlocked in drain_dev_clone_events and the only consumer of
that routine does not need it -- eventhandler code already makes sure the
relevant callback is no longer running.

Reviewed by:	kib
Differential Revision:	https://reviews.freebsd.org/D36268

Drop d_dump from struct cdevsw

2022-05-13T13:42:17+00:00

It appears to be unused. These days struct disk has a d_dump member,
which is what gets passed to the kernel dump framework.

Reviewed by:	markj
MFC after:	2 weeks
Differential Revision:	https://reviews.freebsd.org/D35172

destroy_dev_sched*: Don't hold Giant for all deferred destroy_dev.

2022-04-18T19:04:30+00:00

Rather than using taskqueue_swi_giant which holds Giant for all
deferred destroy_dev calls, create a separate queue for destroyed
devices with D_NEEDGIANT set in the corresponding cdevsw.  The task
for this queue holds Giant whild destroying deferred devices while the
task for the default queue does not hold Giant.

In addition, switch to taskqueue_thread for destroy_dev_sched.
Deferred destroy_dev requests don't need to run at an SWI priority.

Reviewed by:	imp, markj
MFC after:	2 weeks
Differential Revision:	https://reviews.freebsd.org/D34915

Fix handling of D_GIANTOK

2021-06-07T20:45:50+00:00

It was meant to suppress only the printf(), not the subsequent injection
of Giant-protected thunks for various file operations.

Fixes:		fbeb4ccac9
Reported by:	pho
Tested by:	pho
MFC after:	6 days
Pointy hat:	markj

Suppress D_NEEDGIANT warnings for some drivers

2021-06-06T20:44:46+00:00

During boot we warn that the kbd and openfirm drivers are Giant-locked
and may be deleted.  Generally, the warning helps signal that certain
old drivers are not being maintained and are subject to removal, but
this doesn't really apply to certain drivers which are harder to
detangle from Giant.

Add a flag, D_GIANTOK, that devices can specify to suppress the
misleading warning.  Use it in the kbd and openfirm drivers.

Reviewed by:	imp, jhb
MFC after:	1 week
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D30649

Fix several dev_clone callbacks to avoid out-of-bounds reads

2021-03-28T15:08:36+00:00

Use strncmp() instead of bcmp(), so that we don't have to find the
minimum of the string lengths before comparing.

Reviewed by:	kib
Reported by:	KASAN
MFC after:	3 days
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D29463

Giant: move back Giant removal until 14

2021-02-17T21:33:09+00:00

Update the Giant Lock warning message to FreeBSD 14. It's growing increasling
clear that this won't be done before 13.0.

MFC: Insta (re@'s request)