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McKenney" , Boqun Feng , Andy Lutomirski , Dave Watson , linux-kernel@vger.kernel.org, linux-api@vger.kernel.org, Paul Turner , Andrew Morton , Russell King , Thomas Gleixner , Ingo Molnar , "H . Peter Anvin" , Andrew Hunter , Andi Kleen , Chris Lameter , Ben Maurer , Steven Rostedt , Josh Triplett , Linus Torvalds , Catalin Marinas , Will Deacon , Michael Kerrisk , Joel Fernandes , Alexander Viro Subject: Re: [PATCH 02/14] rseq: Introduce restartable sequences system call (v13) Message-ID: <20180516162454.GJ12198@hirez.programming.kicks-ass.net> References: <20180430224433.17407-1-mathieu.desnoyers@efficios.com> <20180430224433.17407-3-mathieu.desnoyers@efficios.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20180430224433.17407-3-mathieu.desnoyers@efficios.com> User-Agent: Mutt/1.9.5 (2018-04-13) Sender: linux-api-owner@vger.kernel.org X-Mailing-List: linux-api@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: 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)