From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754245Ab0ATXuz (ORCPT ); Wed, 20 Jan 2010 18:50:55 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754200Ab0ATXuv (ORCPT ); Wed, 20 Jan 2010 18:50:51 -0500 Received: from kroah.org ([198.145.64.141]:33635 "EHLO coco.kroah.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753309Ab0ATXus (ORCPT ); Wed, 20 Jan 2010 18:50:48 -0500 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Atsushi Nemoto , Arnd Bergmann , Greg Kroah-Hartman Subject: [PATCH 1/8] compat_ioctl: Supress "unknown cmd" message on serial /dev/console Date: Wed, 20 Jan 2010 15:49:56 -0800 Message-Id: <1264031403-32239-1-git-send-email-gregkh@suse.de> X-Mailer: git-send-email 1.6.6 In-Reply-To: <20100120234759.GC32068@kroah.com> References: <20100120234759.GC32068@kroah.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Atsushi Nemoto After the commit fb07a5f8 ("compat_ioctl: remove all VT ioctl handling"), I got this error message on 64-bit mips kernel with 32-bit busybox userland: ioctl32(init:1): Unknown cmd fd(0) cmd(00005600){t:'V';sz:0} arg(7fd76480) on /dev/console The cmd 5600 is VT_OPENQRY. The busybox's init issues this ioctl to know vt-console or serial-console. If the console was serial console, VT ioctls are not handled by the serial driver. And by quick search, I found some programs using VT_GETMODE to check vt-console is available or not. Signed-off-by: Atsushi Nemoto Cc: Arnd Bergmann Signed-off-by: Greg Kroah-Hartman --- fs/compat_ioctl.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c index 332dd00..c5c45de 100644 --- a/fs/compat_ioctl.c +++ b/fs/compat_ioctl.c @@ -1005,6 +1005,9 @@ COMPATIBLE_IOCTL(SCSI_IOCTL_SEND_COMMAND) COMPATIBLE_IOCTL(SCSI_IOCTL_PROBE_HOST) COMPATIBLE_IOCTL(SCSI_IOCTL_GET_PCI) #endif +/* Big V (don't complain on serial console) */ +IGNORE_IOCTL(VT_OPENQRY) +IGNORE_IOCTL(VT_GETMODE) /* Little p (/dev/rtc, /dev/envctrl, etc.) */ COMPATIBLE_IOCTL(RTC_AIE_ON) COMPATIBLE_IOCTL(RTC_AIE_OFF) -- 1.6.5.7