Re: [PATCH 02/14] rseq: Introduce restartable sequences system call (v13)

[Peter Zijlstra]

On Mon, Apr 30, 2018 at 06:44:21PM -0400, Mathieu Desnoyers wrote:
> Expose a new system call allowing each thread to register one userspace
> memory area to be used as an ABI between kernel and user-space for two
> purposes: user-space restartable sequences and quick access to read the
> current CPU number value from user-space.

> ---
>  MAINTAINERS                 |  11 ++
>  arch/Kconfig                |   7 +
>  fs/exec.c                   |   1 +
>  include/linux/sched.h       | 134 +++++++++++++++++
>  include/linux/syscalls.h    |   4 +-
>  include/trace/events/rseq.h |  57 +++++++
>  include/uapi/linux/rseq.h   | 133 +++++++++++++++++
>  init/Kconfig                |  23 +++
>  kernel/Makefile             |   1 +
>  kernel/fork.c               |   2 +
>  kernel/rseq.c               | 357 ++++++++++++++++++++++++++++++++++++++++++++
>  kernel/sched/core.c         |   2 +
>  kernel/sys_ni.c             |   3 +
>  13 files changed, 734 insertions(+), 1 deletion(-)
>  create mode 100644 include/trace/events/rseq.h
>  create mode 100644 include/uapi/linux/rseq.h
>  create mode 100644 kernel/rseq.c
> 

Acked-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>