From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752795Ab0ENENI (ORCPT ); Fri, 14 May 2010 00:13:08 -0400 Received: from mail-px0-f174.google.com ([209.85.212.174]:52482 "EHLO mail-px0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751405Ab0ENELg (ORCPT ); Fri, 14 May 2010 00:11:36 -0400 From: =?UTF-8?q?Arve=20Hj=C3=B8nnev=C3=A5g?= To: linux-pm@lists.linux-foundation.org, linux-kernel@vger.kernel.org Cc: "Rafael J. Wysocki" , =?UTF-8?q?Arve=20Hj=C3=B8nnev=C3=A5g?= , Len Brown , Pavel Machek , Tejun Heo Subject: [PATCH 4/8] PM: suspend_block: Add debugfs file Date: Thu, 13 May 2010 21:11:09 -0700 Message-Id: <1273810273-3039-5-git-send-email-arve@android.com> X-Mailer: git-send-email 1.6.5.1 In-Reply-To: <1273810273-3039-4-git-send-email-arve@android.com> References: <1273810273-3039-1-git-send-email-arve@android.com> <1273810273-3039-2-git-send-email-arve@android.com> <1273810273-3039-3-git-send-email-arve@android.com> <1273810273-3039-4-git-send-email-arve@android.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Report active and inactive suspend blockers in /sys/kernel/debug/suspend_blockers. Signed-off-by: Arve Hjønnevåg --- kernel/power/opportunistic_suspend.c | 43 +++++++++++++++++++++++++++++++++- 1 files changed, 42 insertions(+), 1 deletions(-) diff --git a/kernel/power/opportunistic_suspend.c b/kernel/power/opportunistic_suspend.c index acc1651..c2dad76 100644 --- a/kernel/power/opportunistic_suspend.c +++ b/kernel/power/opportunistic_suspend.c @@ -17,6 +17,7 @@ #include #include #include +#include #include "power.h" @@ -138,7 +139,8 @@ EXPORT_SYMBOL(suspend_blocker_register); /** * suspend_blocker_init - Initialize a suspend blocker's name and register it. * @blocker: Suspend blocker to initialize. - * @name: The name of the suspend blocker to show in debug messages. + * @name: The name of the suspend blocker to show in debug messages and + * /sys/kernel/debug/suspend_blockers. * * The suspend blocker struct and name must not be freed before calling * suspend_blocker_unregister(). @@ -282,3 +284,42 @@ void __init opportunistic_suspend_init(void) suspend_blocker_register(&main_suspend_blocker); suspend_block(&main_suspend_blocker); } + +static struct dentry *suspend_blocker_stats_dentry; + +static int suspend_blocker_stats_show(struct seq_file *m, void *unused) +{ + unsigned long irqflags; + struct suspend_blocker *blocker; + + seq_puts(m, "name\tactive\n"); + spin_lock_irqsave(&list_lock, irqflags); + list_for_each_entry(blocker, &inactive_blockers, link) + seq_printf(m, "\"%s\"\t0\n", blocker->name); + list_for_each_entry(blocker, &active_blockers, link) + seq_printf(m, "\"%s\"\t1\n", blocker->name); + spin_unlock_irqrestore(&list_lock, irqflags); + return 0; +} + +static int suspend_blocker_stats_open(struct inode *inode, struct file *file) +{ + return single_open(file, suspend_blocker_stats_show, NULL); +} + +static const struct file_operations suspend_blocker_stats_fops = { + .owner = THIS_MODULE, + .open = suspend_blocker_stats_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static int __init suspend_blocker_debugfs_init(void) +{ + suspend_blocker_stats_dentry = debugfs_create_file("suspend_blockers", + S_IRUGO, NULL, NULL, &suspend_blocker_stats_fops); + return 0; +} + +postcore_initcall(suspend_blocker_debugfs_init); -- 1.6.5.1