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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 078E2C433EF for ; Mon, 4 Jul 2022 11:00:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234153AbiGDLAP (ORCPT ); Mon, 4 Jul 2022 07:00:15 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50480 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234054AbiGDLAL (ORCPT ); Mon, 4 Jul 2022 07:00:11 -0400 Received: from mail-wr1-x42d.google.com (mail-wr1-x42d.google.com [IPv6:2a00:1450:4864:20::42d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B866AFD35; Mon, 4 Jul 2022 04:00:06 -0700 (PDT) Received: by mail-wr1-x42d.google.com with SMTP id n4so5537773wru.11; Mon, 04 Jul 2022 04:00:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:in-reply-to:date:message-id:references :user-agent:mime-version; bh=r9fNXfRbdc5ZvafBNWErX1+dlYsQ8FGynZjrFEqrCDQ=; b=koOZfNAI6ls9HxqrNk434Buyi99oDW4VmsitHN2ksndpIv7RD0r/YfluDefsYGrvbD sbPymTzb6RH5knV5s633xhz7IXea+K6RkyAk6Mmv7mxAJoK/zgOwM/ZkLm1uXHBRJkBw IZ6e9kH59lneH6EiZECXQ5lyOMpH5OEhp9R/5hA3PDuGLLC/xBHBTg6a6oQ0huxYrc+6 EnD6brQtBZm3nIATVcia/nhn2Eqozh/SF/J2jTNB8LtbFv7+a4xRCAuow0263sNE0haS Nrx8fWFlcBTzR87I8BU7Mw8xdUWSyfSUxYQE6Ug9B/g8SjOzMSzM38LODOKzBFZFtRV1 Vmkw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:in-reply-to:date:message-id :references:user-agent:mime-version; bh=r9fNXfRbdc5ZvafBNWErX1+dlYsQ8FGynZjrFEqrCDQ=; b=vpXH4NEOyu3SmzJruYrsu74n2lebVWDn4uFzDSvIP/mvlNl3340k+yDSLY2fHolRI/ Ao2sc6j33zYsf8na80ld2joieqHk5Ycx2pUnI9JADq1NjA2f8hIZYCvo7Qg09qJTLyPq T7ldyRbyuL0IOYtAcL7chJ8RTD/xdve3IPCJe8ip9rf6Yd69h7xvtw6aPmweq4jc7xSV 5EnoscL6Kwz+eW0tfTbs6tfdACj43QdoXxIDgW+Hkt+ItSQya+he8wmPzNM9DoZDKhim LFBMogpiTFW+75R34ufvBAIZjsorlF/N6Bac/eH5WQ1VUp6tPaBTIx4RaYXHBVK/CCgO Je5w== X-Gm-Message-State: AJIora/fh6uLm2ZFRs5GGaDyGQ+vp8nDG3Eqx0GMhSUSnAflUXFBiyws Rn9iJJxx30+DQhL5W8J2Oz2sdGnJ7vvDOtr/ X-Google-Smtp-Source: AGRyM1uSWRYUuIs7wmTBAvcy8FFXqoXJcNXmPIIzYyY5nnuyuKjoFBhWtTDW2jdv08Ck95bpv+EJ+w== X-Received: by 2002:adf:dc0d:0:b0:21d:ea5:710f with SMTP id t13-20020adfdc0d000000b0021d0ea5710fmr26441065wri.48.1656932404965; Mon, 04 Jul 2022 04:00:04 -0700 (PDT) Received: from imac ([2a02:8010:60a0:0:dc4:4125:ca49:32b7]) by smtp.gmail.com with ESMTPSA id u15-20020a5d434f000000b0021b970a68f9sm30163025wrr.26.2022.07.04.04.00.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 04 Jul 2022 04:00:04 -0700 (PDT) From: Donald Hunter To: Dave Tucker Cc: bpf@vger.kernel.org, corbet@lwn.net, ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org, kafai@fb.com, songliubraving@fb.com, john.fastabend@gmail.com, kpsingh@kernel.org, linux-doc@vger.kernel.org Subject: Re: [PATCH v4 bpf-next 2/2] bpf, docs: document BPF_MAP_TYPE_ARRAY In-Reply-To: (Dave Tucker's message of "Thu, 30 Jun 2022 13:04:09 +0100") Date: Mon, 04 Jul 2022 11:39:53 +0100 Message-ID: References: User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.1 (darwin) MIME-Version: 1.0 Content-Type: text/plain Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org Dave Tucker writes: > +Since Kernel 5.4, memory mapping may be enabled for ``BPF_MAP_TYPE_ARRAY`` by It looks to be 5.5 according to bootlin: https://elixir.bootlin.com/linux/v5.4.203/A/ident/BPF_F_MMAPABLE https://elixir.bootlin.com/linux/v5.5/A/ident/BPF_F_MMAPABLE > +Array elements can also be added using the ``bpf_map_update_elem()`` helper or > +libbpf API. > + > +Since the array is of constant size, ``bpf_map_delete_elem()`` is not supported. > +To clear an array element, you may use ``bpf_map_update_eleme()`` to insert a > +zero value to that index. Typo in bpf_map_update_elem(). Thanks! -- Donald Hunter