From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0BD01C433ED for ; Tue, 27 Apr 2021 01:43:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DC082613AE for ; Tue, 27 Apr 2021 01:43:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233361AbhD0Bn6 (ORCPT ); Mon, 26 Apr 2021 21:43:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55370 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232295AbhD0Bn6 (ORCPT ); Mon, 26 Apr 2021 21:43:58 -0400 Received: from mail-pg1-x533.google.com (mail-pg1-x533.google.com [IPv6:2607:f8b0:4864:20::533]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EC037C061574 for ; Mon, 26 Apr 2021 18:43:15 -0700 (PDT) Received: by mail-pg1-x533.google.com with SMTP id s22so20149626pgk.6 for ; Mon, 26 Apr 2021 18:43:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:cc; bh=zRQeOJX3HV7K6JYwcjW0OEpjeH+y7LJ9bRNMfOYypJw=; b=TtxNuv9Tgn/cmM5dtF4QNQy+5Y00NS/UGsDGSksuyKq0Vzj5+VhT3RsAPsNjSnpFTX IOk4pdTTexMHoMd/mupZLGudAvsxWeAHD3/FupYGA+C4/zpdcrz9HeN7HK7JsIfHcILo 6RYFpyXvLJ6N4pYMia59UiRIPTppRDnBdob0Tv53Rx66GjKJXHqgyJRY1DLt3Kf/qK23 Za4apdgn9zujSSY377MqRWBnhdrb+Uq9hvbHz+4UXaZdfNSo781BfuIIlJCIPOTLOl60 2TBGIqtceaV96DFjiWFc4v2jpvL7jM42BQUxIIWblY3AuDsvrSN1d6zsVqr0tMzRDRUK G54Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:cc; bh=zRQeOJX3HV7K6JYwcjW0OEpjeH+y7LJ9bRNMfOYypJw=; b=DMxsXwOT3QzTBbfoAQmETD5aNwU1Jk3kq0vuDU7Yl7dOCVRrLL29fpYzjE6m2LXIKK xHvNQX4/lmOTWdQRLMebnmsNny9LQJ1bz6RTEIG5EeOz59flBO1ENDuqd/u1lBLgUwFF REZ9Xx8JqRAirrsUZVwUxjP7yRjnorVco/uLREFkkim+ID7YhD6wU6UtLnNOuHqFclXF +HrF7cnrawaRBh9BlKGHLFlAw9MjdpzFvRVvPj9nWmj4ozWEw32ZLsB/7BPNrUF1K4Kh vaaIS6t/h2qNhFwKcC5NpUSGNgf+y0R36ZMNdajpOkdMPLBwoLDvVASKCaRuCpEIsczM 7fqg== X-Gm-Message-State: AOAM5300qF92z1nclysVpPXiA9kcFAPjz5k/Fbo60K2JkN+os2KK+MU+ WPYcmODc9DhSbsyHQHFU3wOxipdVumjkDoynieoCXdkh+1GN7A== X-Google-Smtp-Source: ABdhPJyj3M+8jLVfDOH+a8ZL5jkfwwaLkqKc5a5DL7J2LxDTiKsn2LtK1ZC3BtXuZTpgerv6wLdAPmZcrNVmAFZGCOQ= X-Received: by 2002:a63:7b4d:: with SMTP id k13mr7546304pgn.104.1619487795404; Mon, 26 Apr 2021 18:43:15 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Samantha Miller Date: Mon, 26 Apr 2021 18:43:04 -0700 Message-ID: Subject: Re: Exposing semaphores Cc: rust-for-linux Content-Type: text/plain; charset="UTF-8" To: unlisted-recipients:; (no To-header on input) Precedence: bulk List-ID: X-Mailing-List: rust-for-linux@vger.kernel.org I don't think this sent last time, but sorry for the spam if it did For my research project writing a safe Rust file system in the kernel, I implemented RwLock as a wrapper around the kernel semaphore. I'm not sure if it'll be exactly what you want, but feel free to use it as a reference or more. The RwLock is here: https://gitlab.cs.washington.edu/sm237/bento/-/blob/master/bento/rust/src/std/sync/rwlock.rs. You can do a similar thing for a spinlock wrapper around the kernel spinlock, I believe.