linux(4): Remove sys/cdefs.h inclusion where it's not needed due to 685dc743

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

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

Revert "linux(4): The futex_wait operation should restart."

This reverts commit 5eec19c8eb0e1afafd7290325c61611c9a13b621 due to its
wrong. Linux interrupts futex syscall on signal and return EINTR.

spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD

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

spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD

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

show more ...

linux(4): Rename linux_timer.h to linux_time.h

To avoid confusing people, rename linux_timer.h to linux_time.h,
as linux_timer.c is the implementation of timer syscalls only,
while linux_time.c cont

linux(4): Rename linux_timer.h to linux_time.h

To avoid confusing people, rename linux_timer.h to linux_time.h,
as linux_timer.c is the implementation of timer syscalls only,
while linux_time.c contains implementation of all stuff declared
in linux_time.h.

MFC after: 2 weeks

show more ...

linux(4): Cleanup includes under compat/linux

Cleanup unneeded includes, sort the rest according to style(9).
No functional changes.

MFC after: 2 weeks

linux(4): Cleanup sys/sysent.h from linux_util

Include sys/sysent.h directly where it needed. The linux_util.h included
in a most source files of the Linuxulator, avoid collecting a rarely used
incl

linux(4): Cleanup sys/sysent.h from linux_util

Include sys/sysent.h directly where it needed. The linux_util.h included
in a most source files of the Linuxulator, avoid collecting a rarely used
includes here.

MFC after: 2 weeks

show more ...

linux(4): Get rid of the opt_compat.h include.

Since e013e369 COMPAT_LINUX, COMPAT_LINUX32 build options are removed,
so include of opt_compat.h is no more needed.

MFC after: 2 weeks

linux(4): Fix get_robust_list() syscall return value.

The system call returns the head of the robust futex list. The list head is stored
in the location pointed to by the head argument. When copying

linux(4): Fix get_robust_list() syscall return value.

The system call returns the head of the robust futex list. The list head is stored
in the location pointed to by the head argument. When copying data between address
spaces use proper head storage size as it depends on an emulated ABI.

PR: 267616
MFC after: 3 days

show more ...

linux(4): To improve readability use FUTEX_UNOWNED instead of 0

MFC after: 2 weeks

linux(4): Handle cas failure on ll/sc operations

Follow the 11a6ecd4. Check and handle the case when the ll/sc casu fails
even when the compare succeeds.

For more details PR/263825, https://reviews

linux(4): Handle cas failure on ll/sc operations

Follow the 11a6ecd4. Check and handle the case when the ll/sc casu fails
even when the compare succeeds.

For more details PR/263825, https://reviews.freebsd.org/D35150.

Obtained from: Andrew@
MFC after: 2 weeks

show more ...

linux(4); Style.

MFC after: 2 weeks

linux(4): Return native error from futex_atomic_op to avoid conversion by the caller.

MFC after: 2 weeks

linux(4): The futex_wait operation should restart.

It's ok from the futex_wait perspective as umtxq_sleep method uses
absolute sleep timeout.

MFC after: 2 weeks

linux(4): Add a helper intended for copying timespec's from the userspace.

There are many places where we copyin Linux timespec from the userspace
and then convert it to the kernel timespec. To avoi

linux(4): Add a helper intended for copying timespec's from the userspace.

There are many places where we copyin Linux timespec from the userspace
and then convert it to the kernel timespec. To avoid code duplication
add a tiny halper for doing this.

MFC after: 2 weeks

show more ...

linux(4): Improve comment.

Reported by: pfg
MFC after: 2 weeks

linux(4): Fix futex copyrights.

As no more NetBSD code in futexes exists replace NetBSD copyrights by
standard FreeBSD 2 clause license.
Add Roman Divacky's copyrights as an author of the robust fut

linux(4): Fix futex copyrights.

As no more NetBSD code in futexes exists replace NetBSD copyrights by
standard FreeBSD 2 clause license.
Add Roman Divacky's copyrights as an author of the robust futexes.

Differential revision: https://reviews.freebsd.org/D31347
MFC after: 2 weeks

show more ...

linux(4): Eliminate a now unused includes after futexes refactoring.

MFC after: 2 weeks

linux(4): Add a comment about wait/requeue pi operations.

MFC after: 2 weeks

linux(4): Handle incorrect FUTEX_CLOCK_REALTIME option bit.

Return ENOSYS if the FUTEX_CLOCK_REALTIME option bit is specified for an
inappropriate futex operation.

MFC after: 2 weeks

linux(4): Handle FUTEX_LOCK_PI2 oeration.

FUTEX_LOCK_PI2 was added to support clock selection as FUTEX_LOCK_PI uses a
CLOCK_REALTIME based absolute value since it was implemented, but it does not
re

linux(4): Handle FUTEX_LOCK_PI2 oeration.

FUTEX_LOCK_PI2 was added to support clock selection as FUTEX_LOCK_PI uses a
CLOCK_REALTIME based absolute value since it was implemented, but it does not
require that the FUTEX_CLOCK_REALTIME bit is set, because that was introduced
later.

MFC after: 2 weeks

show more ...

linux(4): Use variable name not type for sizeof() to calculate storage size.

MFC after: 2 weeks

linux(4): Move len variable initialization to the appropriate place.

MFC after: 2 weeks

linux(4): Use linux_tdfind() in get_robust_list.

In the Linux emulation layer linux_tdfind() has a special purpose to
handle glibc specific TID mangling and we should use it instead of tdfind().

MF

linux(4): Use linux_tdfind() in get_robust_list.

In the Linux emulation layer linux_tdfind() has a special purpose to
handle glibc specific TID mangling and we should use it instead of tdfind().

MFC after: 2 weeks

show more ...

linux(4): Eliminate unnecessary error initialization.

MFC after: 2 weeks