Remove residual blank line at start of Makefile

This is a residual of the $FreeBSD$ removal.

MFC After: 3 days (though I'll just run the command on the branches)
Sponsored by: Netflix

pthread_sigqueue(3): document

Reviewed by: markj
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D44867

sys/queue.h: Add {LIST,TAILQ}_REPLACE().

MFC after: 1 week
Obtained from: NetBSD
Sponsored by: Klara, Inc.
Reviewed by: cperciva, imp
Differential Revision: https://reviews.freebsd.org/D44679

share: Remove ancient SCCS tags.

Remove ancient SCCS tags from the tree, automated scripting, with two
minor fixup to keep things compiling. All the common forms in the tree
were removed with a perl

share: Remove ancient SCCS tags.

Remove ancient SCCS tags from the tree, automated scripting, with two
minor fixup to keep things compiling. All the common forms in the tree
were removed with a perl script.

Sponsored by: Netflix

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include: Implement N2867.

This adds macros for checked addition, subtraction, and multiplication with semantics similar to the builtins gcc and clang have had for years.

Reviewed by: kib, emaste
Di

include: Implement N2867.

This adds macros for checked addition, subtraction, and multiplication with semantics similar to the builtins gcc and clang have had for years.

Reviewed by: kib, emaste
Differential Revision: https://reviews.freebsd.org/D41734

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Remove $FreeBSD$: one-line sh pattern

Remove /^\s*#[#!]?\s*\$FreeBSD\$.*$\n/

netlink: add snl(3) manpage to the build

rb_tree: augmentation shortcut

RB-tree augmentation maintains data in each node of the tree that
represents the product of some associative operator applied to all the
nodes of the subtree rooted at

rb_tree: augmentation shortcut

RB-tree augmentation maintains data in each node of the tree that
represents the product of some associative operator applied to all the
nodes of the subtree rooted at that node. If a node in the tree
changes, augmentation data for the node is updated for that node and
all nodes on the path from that node to the tree root. However,
sometimes, augmenting a node changes no data in that node,
particularly if the associated operation is something involving 'max'
or 'min'. If augmentation changes nothing in a node, then the work of
walking to the tree root from that point is pointless, because
augmentation will change nothing in those nodes either. This change
makes it possible to avoid that wasted work.

Define RB_AUGMENT_CHECK as a macro much like RB_AUGMENT, but which
returns a value 'true' when augmentation changes the augmentation data
of a node, and false otherwise. Change code that unconditionally walks
and augments to the top of tree to code that stops once an
augmentation has no effect. In the case of rebalancing the tree after
insertion or deletion, where previously a node rotated into the path
was inevitably augmented on the march to the tree root, now check to
see if it needs augmentation because the march to the tree root
stopped before reaching it.

Change the augmentation function in iommu_gas.c so that it returns
true/false to indicate whether the augmentation had any effect.

Reviewed by: alc, kib
MFC after: 3 weeks
Differential Revision: https://reviews.freebsd.org/D36509

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tree.3: document RB_AUGMENT

Document the RB_AUGMENT macro, and provide an example of its use.
Reviewed by: alc, kib
MFC after: 3 weeks
Differential Revision: https://reviews.freebsd.org/D35518

man3: Add links for some bitstring(3) routines

MFC after: 1 week
Sponsored by: The FreeBSD Foundation

pthread_np.3: Add a manpage summarizing all of the pthread extensions.

PR: 197299
MFC after: 1 week

pthread_mutexattr(3): install pthread_mutexattr_get/setpshared links

Reviewed by: markj
Sponsored by: The FreeBSD Foundation
MFC after: 3 days
Differential revision: https://reviews.freebsd.org/D322

pthread_mutexattr(3): install pthread_mutexattr_get/setpshared links

Reviewed by: markj
Sponsored by: The FreeBSD Foundation
MFC after: 3 days
Differential revision: https://reviews.freebsd.org/D32243

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assert.3: Document static_assert and _Static_assert

Reviewed by: imp, 0mp
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D29833

build: remove LIBPTHREAD/LIBTHR build options

WITHOUT_LIBTHR has been broken for a little over five years now, since the
xz 5.2.0 update introduced a hard liblzma dependency on libthr, and building

build: remove LIBPTHREAD/LIBTHR build options

WITHOUT_LIBTHR has been broken for a little over five years now, since the
xz 5.2.0 update introduced a hard liblzma dependency on libthr, and building
a useful system without threading support is becoming increasingly more
difficult.

Additionally, in the five plus years that it's been broken more reverse
dependencies have cropped up in libzstd, libsqlite3, and libcrypto (among
others) that make it more and more difficult to reconcile the effort needed
to fix these options.

Remove the broken options.

PR: 252760
Reviewed by: brooks, emaste, kib
Differential Revision: https://reviews.freebsd.org/D28263

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Add pthread_getname_np() and pthread_setname_np() aliases for
pthread_get_name_np() and pthread_set_name_np().

This re-applies r361770 after compatibility fixes.

Reviewed by: antoine, jkim, markj
T

Add pthread_getname_np() and pthread_setname_np() aliases for
pthread_get_name_np() and pthread_set_name_np().

This re-applies r361770 after compatibility fixes.

Reviewed by: antoine, jkim, markj
Tested by: antoine (exp-run)
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D25117

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Revert r361770 "Add pthread_getname_np() and pthread_setname_np() aliases" for now.

It is not compatible enough with Linux.

Requested by: antoine, jkim
Sponsored by: The FreeBSD Foundation

Add pthread_getname_np() and pthread_setname_np() aliases

for pthread_get_name_np() and pthread_set_name_np(), to be
compatible with Linux.

PR: 238404
Proposed and reviewed by: markj
Sponsored by:

Add pthread_getname_np() and pthread_setname_np() aliases

for pthread_get_name_np() and pthread_set_name_np(), to be
compatible with Linux.

PR: 238404
Proposed and reviewed by: markj
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D25117

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Merge ^/head r357966 through r357999.

Add pthread_peekjoin_np(3).

The function allows to peek at the thread exit status and even see
return value, without joining (and thus finally destroying) the target
thread.

Reviewed by: markj
Spon

Add pthread_peekjoin_np(3).

The function allows to peek at the thread exit status and even see
return value, without joining (and thus finally destroying) the target
thread.

Reviewed by: markj
Sponsored by: The FreeBSD Foundation (kib)
MFC after: 2 weeks
Differential revision: https://reviews.freebsd.org/D23676

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Merge ^/head r352764 through r353315.

Introduce stats(3), a flexible statistics gathering API.

This provides a framework to define a template describing
a set of "variables of interest" and the intended way for
the framework to maintain

Introduce stats(3), a flexible statistics gathering API.

This provides a framework to define a template describing
a set of "variables of interest" and the intended way for
the framework to maintain them (for example the maximum, sum,
t-digest, or a combination thereof). Afterwards the user
code feeds in the raw data, and the framework maintains
these variables inside a user-provided, opaque stats blobs.
The framework also provides a way to selectively extract the
stats from the blobs. The stats(3) framework can be used in
both userspace and the kernel.

See the stats(3) manual page for details.

This will be used by the upcoming TCP statistics gathering code,
https://reviews.freebsd.org/D20655.

The stats(3) framework is disabled by default for now, except
in the NOTES kernel (for QA); it is expected to be enabled
in amd64 GENERIC after a cool down period.

Reviewed by: sef (earlier version)
Obtained from: Netflix
Relnotes: yes
Sponsored by: Klara Inc, Netflix
Differential Revision: https://reviews.freebsd.org/D20477

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Rename ARB_REBALANCE(3) to ARB_REINSERT(3) to match tree(3),
and document it.

MFC after: 2 weeks
Sponsored by: Klara Inc, Netflix

Sort MLINKS for arb(3), and actually make them work by fixing a '=' vs '+='
mixup.

MFC after: 2 weeks
Sponsored by: Klara Inc, Netflix

Add RB_REINSERT(3), a low overhead alternative to removing a node
and reinserting it back with an updated key.

This is one of dependencies for the upcoming stats(3) code.

Reviewed by: cem
Obtained

Add RB_REINSERT(3), a low overhead alternative to removing a node
and reinserting it back with an updated key.

This is one of dependencies for the upcoming stats(3) code.

Reviewed by: cem
Obtained from: Netflix
MFC after: 2 weeks
Sponsored by: Klara Inc, Netflix
Differential Revision: https://reviews.freebsd.org/D21786

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Merge ^/head r352319 through r352435.