c454c571 se Feb. 4, 2022, 10:44 p.m.
The current implementation of sysctlbyname() does not support the user
sub-tree. This function exits with a return value of 0, but sets the
passed string buffer to an empty string.

As a result, the whereis program did not use the value of the sysctl
variable "user.cs_path", but only the value of the environment
variable "PATH".

This update makes whereis use the sysctl function with a fixed OID,
which already supports the user sub-tree.

MFC after:	3 days
cgit
7510633e imp Feb. 4, 2022, 10:38 p.m.
Advise people to omit $FreeBSD$ (in both comments and macros) unless the
code is definitely going to be merged to stable/12. This strengthens
previous statements and is appropriate now that stable/11 is no longer
supported. If people are wrong and things are unexpected merged to 12,
tags can be added before that merge. No sense adding a tag that will
never be expanded and removed later on the off chance it might wind up
in stable/12.

The next step is likely to weaken this to apply just to mergemaster
managed files, but not today.

Reviewed by:	rpokala, cem, erj, hselasky, brooks, kib
Differential Revision:	https://reviews.freebsd.org/D34152
cgit
9583be04 mckusick Feb. 4, 2022, 10:04 p.m.
504cb544 mckusick Feb. 4, 2022, 10 p.m.
c0bfa109 mckusick Feb. 4, 2022, 7:47 p.m.
Part of the problem was that fsck_ffs would read the superblock
multiple times complaining and repairing the superblock check hash
each time and then at the end failing to write out the superblock
with the corrected check hash. This fix reads the superblock just
once and if the check hash is corrected ensures that the fixed
superblock gets written.

Tested by:    Peter Holm
PR:           245916
MFC after:    1 week
Sponsored by: Netflix
cgit
930a7c2a emaste Feb. 4, 2022, 4:20 p.m.
Some sanitizers (at least msan) currently require ASLR to be disabled.
When we detect that ASLR is enabled, re-exec with it disabled rather
than exiting with an error.  See LLVM GitHub issue 53256 for more
detail: https://github.com/llvm/llvm-project/issues/53256

No objection:	dim
MFC after:	2 weeks
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D33934
cgit
96fe7c8a emaste Feb. 4, 2022, 4:18 p.m.
Based on getMainExecutable() in llvm/lib/Support/Unix/Path.inc.
This will need a little more work for an upstream change as it must
support older FreeBSD releases that lack elf_aux_info() / AT_EXEC_PATH.

No objection:	dim
MFC after:	2 weeks
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D33934
cgit
867b4dec manu Feb. 4, 2022, 1:31 p.m.
For write operation pseudofs creates an sbuf with the data.
Use this data instead of the uio as it's not usable anymore after
uiomove.

Reviewed by:	hselasky
MFC after:	1 week
Sponsored by:	Beckhoff Automation GmbH & Co. KG
Differential Revision:	https://reviews.freebsd.org/D34114
cgit
e11ad014 se Feb. 4, 2022, 12:44 p.m.
Testing of a new feature revealed that calling sysctl() to retrieve
the value of the user.localbase variable passing too low a buffer size
could leave the result buffer unchanged.

The behavior in the normal case of a sufficiently large buffer was
correct.

All known callers pass a sufficiently large buffer and have thus not
been affected by this issue. If a non-default value had been assigned
to this variable, the result was as documented, too.

Fix the function to fill the buffer with a partial result, if the
passed in buffer size is too low to hold the full result.

MFC after:	3 days
cgit
9596b349 kib Feb. 4, 2022, 12:01 p.m.
Modules no longer call kernel functions for atomic ops, and since the
previous commit, we always use lock prefix.

Submitted by:	Elliott Mitchell <ehem+freebsd@m5p.com>
Reviewed by:	jhb, markj
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D34153
cgit
9c0b759b kib Feb. 4, 2022, 12:01 p.m.
Atomics have significant other use besides providing in-system
primitives for safe memory updates.  They are used for implementing
communication with out of system software or hardware following some
protocols.

For instance, even UP kernel might require a protocol using atomics to
communicate with the software-emulated device on SMP hypervisor.  Or
real hardware might need atomic accesses as part of the proper
management protocol.

Another point is that UP configurations on x86 are extinct, so slight
performance hit by unconditionally use proper atomics is not important.
It is compensated by less code clutter, which in fact improves the
UP/i386 lifetime expectations.

Requested by:	Elliott Mitchell <ehem+freebsd@m5p.com>
Reviewed by:	Elliott Mitchell, imp, jhb, markj, royger
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D34153
cgit
cbf999e7 kib Feb. 4, 2022, 12:01 p.m.
Reviewed by:	Elliott Mitchell, imp, jhb, markj, royger
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D34153
cgit
664640ba andrew Feb. 4, 2022, 10:49 a.m.
While here clean up the names for the naming convention of the other
registers in this file.

Reviewed by:	kib, mhorne (earlier version)
Sponsored by:	The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D34060
cgit
cd7306bb wma Feb. 4, 2022, 9:25 a.m.
Move if_free outside MRW_LOCK. This will silence LOR message
which might appere during deinitialization.
cgit
e388de98 adrian Feb. 4, 2022, 5:27 a.m.
Summary:

This switch is based off of the AR8327/AR8337 external switch/PHY.
However unlike the AR8327/AR8337 it itself doesn't have any PHYs;
instead an external PHY connects to it using the PSGMII port.

Differential Revision: https://reviews.freebsd.org/D34112
Reviewed by: manu

This code is inspired by the ar40xx code in openwrt, which itself
is based on the Qualcomm QCA-SSDK.  Both of these sources are, amusingly,
BSD licenced - and thus I have included some of the comments in the
hardware workaround paths to document some of the magic numbers.
cgit