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=-9.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,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 4F060CA90AF for ; Tue, 12 May 2020 16:37:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3508A206CC for ; Tue, 12 May 2020 16:37:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728163AbgELQh5 (ORCPT ); Tue, 12 May 2020 12:37:57 -0400 Received: from foss.arm.com ([217.140.110.172]:58244 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726367AbgELQh5 (ORCPT ); Tue, 12 May 2020 12:37:57 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 26EE011B3; Tue, 12 May 2020 09:37:57 -0700 (PDT) Received: from e103592.cambridge.arm.com (usa-sjc-imap-foss1.foss.arm.com [10.121.207.14]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 6EDD23F305; Tue, 12 May 2020 09:37:56 -0700 (PDT) From: Dave Martin To: mtk.manpages@gmail.com Cc: linux-man@vger.kernel.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH 12/14] prctl.2: Clarify the unsupported hardware case of EINVAL Date: Tue, 12 May 2020 17:36:57 +0100 Message-Id: <1589301419-24459-13-git-send-email-Dave.Martin@arm.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1589301419-24459-1-git-send-email-Dave.Martin@arm.com> References: <1589301419-24459-1-git-send-email-Dave.Martin@arm.com> Sender: linux-man-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-man@vger.kernel.org prctls that are architecture-specific won't work on other architectures, and arch-specific prctls that manipulate optional hardware features likewise won't work if that hardware feature is not present. The established pattern seems to be to treat such prctls as if they are unimplemented, when attempted on the wrong hardware. Cover these cases with some generic weasel words in the closet existing EINVAL clause. Signed-off-by: Dave Martin --- man2/prctl.2 | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/man2/prctl.2 b/man2/prctl.2 index 2361b44..7f511d2 100644 --- a/man2/prctl.2 +++ b/man2/prctl.2 @@ -1616,7 +1616,8 @@ is an invalid address. .B EINVAL The value of .I option -is not recognized. +is not recognized, +or not supported on this system. .TP .B EINVAL .I option -- 2.1.4