From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S935830AbYBGVVf (ORCPT ); Thu, 7 Feb 2008 16:21:35 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1762892AbYBGVNA (ORCPT ); Thu, 7 Feb 2008 16:13:00 -0500 Received: from mx1.redhat.com ([66.187.233.31]:56348 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934271AbYBGVM6 (ORCPT ); Thu, 7 Feb 2008 16:12:58 -0500 Date: Thu, 7 Feb 2008 16:12:29 -0500 From: Jason Baron To: mathieu.desnoyers@polymtl.ca Cc: akpm@linux-foundation.org, mingo@elte.hu, fche@redhat.com, linux-kernel@vger.kernel.org Subject: [patch 3/4] make pr_debug() dynamic - sysctl support Message-ID: <20080207211229.GE14732@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org -add /proc/sys/debug/pr_debug, to toggle pr_debug() on/off Signed-off-by: Jason Baron --- kernel/sysctl.c | 41 +++++++++++++++++++++++++++++++++++++++++ 1 files changed, 41 insertions(+), 0 deletions(-) diff --git a/kernel/sysctl.c b/kernel/sysctl.c index 7cb1ac3..73508d7 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -155,6 +155,11 @@ static int proc_do_cad_pid(struct ctl_table *table, int write, struct file *filp static int proc_dointvec_taint(struct ctl_table *table, int write, struct file *filp, void __user *buffer, size_t *lenp, loff_t *ppos); #endif +#ifdef CONFIG_PR_DEBUG_DYNAMIC +static int proc_pr_debug_handler(struct ctl_table *table, int write, + struct file *filp, void __user *buffer, + size_t *lenp, loff_t *ppos); +#endif static struct ctl_table root_table[]; static struct ctl_table_root sysctl_table_root; @@ -1312,6 +1317,16 @@ static struct ctl_table debug_table[] = { .proc_handler = proc_dointvec }, #endif +#ifdef CONFIG_PR_DEBUG_DYNAMIC + { + .ctl_name = CTL_UNNUMBERED, + .procname = "pr_debug", + .data = NULL, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = &proc_pr_debug_handler + }, +#endif { .ctl_name = 0 } }; @@ -2499,6 +2514,32 @@ static int proc_do_cad_pid(struct ctl_table *table, int write, struct file *filp return 0; } +#ifdef CONFIG_PR_DEBUG_DYNAMIC + +static int proc_pr_debug_handler(struct ctl_table *table, int write, + struct file *filp, void __user *buffer, + size_t *lenp, loff_t *ppos) +{ + int tmp, r; + + if (!write) + tmp = imv_read(pr_debug_on); + r = __do_proc_dointvec(&tmp, table, write, filp, buffer, + lenp, ppos, NULL, NULL); + if (r) + return r; + + if (write) { + if (tmp) + imv_set(pr_debug_on, 1); + else + imv_set(pr_debug_on, 0); + } + return 0; +} + +#endif + #else /* CONFIG_PROC_FS */ int proc_dostring(struct ctl_table *table, int write, struct file *filp,