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=-8.9 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 A90CDC04AB6 for ; Tue, 28 May 2019 04:31:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7DCED2075B for ; Tue, 28 May 2019 04:31:32 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="k7uKqwq9" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727557AbfE1Ebb (ORCPT ); Tue, 28 May 2019 00:31:31 -0400 Received: from mail-pf1-f194.google.com ([209.85.210.194]:41216 "EHLO mail-pf1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726675AbfE1Ebb (ORCPT ); Tue, 28 May 2019 00:31:31 -0400 Received: by mail-pf1-f194.google.com with SMTP id q17so5804398pfq.8 for ; Mon, 27 May 2019 21:31:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=D9P09ET3lHKfQiCPrh2AxK6gKOQt7ghR7HUM0eo8OdI=; b=k7uKqwq9bZqFUKAqPtguHHw3HhdORsREe8G/3ZhMJQi3bmeegHUURhCZqRPruvTccs hr9CngPXacVjKJMb56+pubc0e9i26ao4jTtUtPjObfqCNBFtfeIWGyLNVsgJ2G7RsRk3 zh7AMgzDOUwmWmyViBuqtY0Ggpmp2+iDiVuyNxAFbc2kg6MyZbRWSlXEzxJrcBzTGyv3 jc7bu9zKObBQVV7B1dk4p4jY+koLgXbWC1dTdemtR911IJNVrJr+l/6RfdJ+iLe9EDen f+tsQe39mwr4lq96x7q8PZx4YdcL411CKP1GrrzlLqxSHAVQpE/vkt/3ioUSkn1PhcGJ uKrg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=D9P09ET3lHKfQiCPrh2AxK6gKOQt7ghR7HUM0eo8OdI=; b=NwTijNCZLsuGXDG1e0J+8Rh2/qzwq8XuKH2VEPU8vU5UdUiTYrSNYuQ1S3ltLzor3c A+GJrGqhE0MclvJM3baFEB6ea0BxrwGRsCLWBt95k96scPDBzZL0CdCteiUGRGE5k1pX JhrrBSghmr8AgqJBsbropQVc8Jphi5dfpz55cPkGkEs4d6McIJpv/txTQ2K/vpRSsABe qpEPlnd4nBvRNi9dx1ZUG4Z7Wwc7RUgPE1mgsAww8CbHB1RKnzHbfX1ax8JSBlzqTk81 Q+59qXrNcNR1Xk5+Lqg4U+OmvjQ32vAL8wHMW32tmwWFeC+c/wczoOdmQc5CAUomTpoV 3lfg== X-Gm-Message-State: APjAAAUkm6iIQTI+6ZjZo1LaGDqfLbv+CsWWqYZHmPJtD/+rH46P8kw6 abZlEhg9uovmc67D9BrxiMk= X-Google-Smtp-Source: APXvYqxXkWRZCb5ZO1h9FXtzO/gBcbF/dUKrpPNA/6gd/uJRgzrbox6YkKsm+JOH2Xqp4uHfdktybg== X-Received: by 2002:a17:90a:a616:: with SMTP id c22mr3081536pjq.46.1559017890382; Mon, 27 May 2019 21:31:30 -0700 (PDT) Received: from bourget-gt.lan (c-98-234-52-230.hsd1.ca.comcast.net. [98.234.52.230]) by smtp.gmail.com with ESMTPSA id h5sm13575075pfk.163.2019.05.27.21.31.29 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 27 May 2019 21:31:29 -0700 (PDT) From: Trevor Bourget To: jslaby@suse.com, gregkh@linuxfoundation.org Cc: linux-kernel@vger.kernel.org Subject: [PATCH] vt: configurable number of console devices Date: Mon, 27 May 2019 21:31:17 -0700 Message-Id: <20190528043117.169987-1-tgb.kernel@gmail.com> X-Mailer: git-send-email 2.22.0.rc1.257.g3120a18244-goog MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Having 63 vt devices for embedded systems might be overkill, so provide a configuration MAX_NR_CONSOLES to allow this consumption to be reduced. Signed-off-by: Trevor Bourget --- drivers/tty/Kconfig | 9 +++++++++ include/uapi/linux/vt.h | 4 ++++ 2 files changed, 13 insertions(+) diff --git a/drivers/tty/Kconfig b/drivers/tty/Kconfig index 3b1d312bb175..98e21589f4af 100644 --- a/drivers/tty/Kconfig +++ b/drivers/tty/Kconfig @@ -42,6 +42,15 @@ config VT If unsure, say Y, or else you won't be able to do much with your new shiny Linux system :-) +config MAX_NR_CONSOLES + int "Maximum number of consoles to permit" + depends on VT + range 1 63 + default "63" + ---help--- + The maximum number of consoles that can be used. + The default is 63. + config CONSOLE_TRANSLATIONS depends on VT default y diff --git a/include/uapi/linux/vt.h b/include/uapi/linux/vt.h index e9d39c48520a..3567dd239758 100644 --- a/include/uapi/linux/vt.h +++ b/include/uapi/linux/vt.h @@ -8,9 +8,13 @@ * resizing). */ #define MIN_NR_CONSOLES 1 /* must be at least 1 */ +#ifdef CONFIG_MAX_NR_CONSOLES +#define MAX_NR_CONSOLES CONFIG_MAX_NR_CONSOLES +#else #define MAX_NR_CONSOLES 63 /* serial lines start at 64 */ /* Note: the ioctl VT_GETSTATE does not work for consoles 16 and higher (since it returns a short) */ +#endif /* 0x56 is 'V', to avoid collision with termios and kd */ -- 2.22.0.rc1.257.g3120a18244-goog