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=-20.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 05715C433EF for ; Tue, 21 Sep 2021 21:40:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E26B561019 for ; Tue, 21 Sep 2021 21:40:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235511AbhIUVmH (ORCPT ); Tue, 21 Sep 2021 17:42:07 -0400 Received: from mail.kernel.org ([198.145.29.99]:57586 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235138AbhIUVmD (ORCPT ); Tue, 21 Sep 2021 17:42:03 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id EC17B61159; Tue, 21 Sep 2021 21:40:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1632260434; bh=ws7c32By7Yah23i6ZVsT0SmTg7GkCW7FLFsyG2F4VNg=; h=From:To:Cc:Subject:Date:From; b=tvYpKN0QFACI2HAXPapSOhijBgvMZd5DU/o8KQR/I0laAVURKvQxh66ZWJpIkdFC4 5AjHqqtQOxZC3Z7VL42UCMibIVOyHGvWYbTbXHb83V3SdL3301+5En++zOjdZ2fhSR RbpqajjK5Lto2dp3N4RbRYOP3BgcMCUiQMlp/jS2BmQamkwMAewYP7W1OUfawGmPjo 0AMzZmnzAayGqlzIfYt81We68TjvD5ppI06qcB68LTonJTt0tTYZ+MgV8P0NDAmNCt blRDE0rllXX4EUWFA6sLns4DMPpxkr4CRa8QzK6/iPVv6YncHzZ7EoAciaOonj9mZQ UxcVWLhphMc7A== From: Mark Brown To: Theodore Ts'o Cc: linux-kernel@vger.kernel.org, Mark Brown Subject: [PATCH] random: Document add_hwgenerator_randomness() with other input functions Date: Tue, 21 Sep 2021 22:39:19 +0100 Message-Id: <20210921213919.31875-1-broonie@kernel.org> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1063; h=from:subject; bh=ws7c32By7Yah23i6ZVsT0SmTg7GkCW7FLFsyG2F4VNg=; b=owGbwMvMwMWocq27KDak/QLjabUkhkSvgHstXjYs4q/XVC+vufLWPH6P31nZfRvnrbEqkZB8bur8 akZqJ6MxCwMjF4OsmCLL2mcZq9LDJbbOfzT/FcwgViaQKQxcnAIwkcJ09v+5nc2xGUf0/Pe1HPFm4j EPNxfL5VLxYVs8eynj9OipD5kL3y8Kbwg+ECr+bM0nW0uLqyoKjtG9a9hTd+fe/tjNYMfSl3UjMXxl +qs3/ro59u+dir6KPF7jfXzbAp2LG1c27rvwMF2rWtnt69XS1Bb/Ip1vjGY9Lm8Pmn5vFvBpyhbI1H K/kXlN8E+oo0/7pl+K1qWLdjyeqZFV0HTCxs+S60PrzBnWbesvy+kek5fjlnyXnzC3uPOgaO58ERZ2 iTyB75Nv/PZqN1oXG1izU3ndfRm1BbwmjKtTjaavcr+2du7dOcUNzDv4H+RHiL6N/L63/7ZMn8HnYr sPnzrWh3bt2vLWeoY/T69ewqWlAA== X-Developer-Key: i=broonie@kernel.org; a=openpgp; fpr=3F2568AAC26998F9E813A1C5C3F436CA30F5D8EB Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The section at the top of random.c which documents the input functions available does not document add_hwgenerator_randomness() which might lead a reader to overlook it. Add a brief note about it. Signed-off-by: Mark Brown --- drivers/char/random.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/char/random.c b/drivers/char/random.c index 605969ed0f96..456a4f43d935 100644 --- a/drivers/char/random.c +++ b/drivers/char/random.c @@ -228,6 +228,14 @@ * particular randomness source. They do this by keeping track of the * first and second order deltas of the event timings. * + * There is also an interface for true hardware RNGs: + * + * void add_hwgenerator_randomness(const char *buffer, size_t count, + * size_t entropy); + * + * This will credit entropy as specified by the caller, if the entropy + * pool is full it will block until more entropy is needed. + * * Ensuring unpredictability at system startup * ============================================ * -- 2.20.1