Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758183AbXHTCqR (ORCPT ); Sun, 19 Aug 2007 22:46:17 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755612AbXHTCqH (ORCPT ); Sun, 19 Aug 2007 22:46:07 -0400 Received: from nwd2mail11.analog.com ([137.71.25.57]:10665 "EHLO nwd2mail11.analog.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754910AbXHTCqE (ORCPT ); Sun, 19 Aug 2007 22:46:04 -0400 X-IronPort-AV: i="4.19,282,1183348800"; d="scan'208"; a="37548302:sNHT24964177" From: Robin Getz Organization: Blackfin uClinux org To: Andrew Morton Subject: [PATCH 1/1] ensure we don't use bootconsoles after init has been released Date: Sun, 19 Aug 2007 22:46:05 -0400 User-Agent: KMail/1.9.5 Cc: torvalds@linux-foundation.org, linux-kernel@vger.kernel.org, "Gerd Hoffmann" MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200708192246.05783.rgetz@blackfin.uclinux.org> X-OriginalArrivalTime: 20 Aug 2007 02:46:02.0864 (UTC) FILETIME=[3F70A700:01C7E2D4] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1554 Lines: 48 From: Robin Getz This is a followup to the cleanups for earlyprintk patch from Gerd Hoffmann http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=69331af79cf29e26d1231152a172a1a10c2df511 This ensures that a bootconsole is unregistered if it is not replaced. The current implementation spews garbage out the bootconsole in this case, since the bootconsole structure is normally in the init section, and is freed, but still used. Signed-off-by: Robin Getz --- linux-2.6.x/kernel/printk.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) Index: linux-2.6.x/kernel/printk.c =================================================================== --- linux-2.6.x/kernel/printk.c +++ linux-2.6.x/kernel/printk.c @@ -1104,6 +1104,20 @@ } EXPORT_SYMBOL(unregister_console); +static int __init disable_boot_consoles(void) +{ + struct console *con; + + for (con = console_drivers; con; con = con->next) { + if (con->flags & CON_BOOT) { + printk(KERN_INFO "Turn off boot console %s%d\n", + con->name, con->index); + unregister_console(con); + } + } +} +late_initcall(disable_boot_consoles); + /** * tty_write_message - write a message to a certain tty, not just the console. * @tty: the destination tty_struct - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/