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From: Kay Sievers <kay.sievers@suse.de>
To: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: LKML <linux-kernel@vger.kernel.org>,
	Paul Mundt <lethal@linux-sh.org>, Greg KH <gregkh@suse.de>,
	Linux PM mailing list <linux-pm@lists.linux-foundation.org>,
	Russell King <linux@arm.linux.org.uk>,
	Magnus Damm <magnus.damm@gmail.com>,
	linux-sh@vger.kernel.org
Subject: Re: [PATCH 9/10] sh: Use struct syscore_ops instead of sysdev class and sysdev
Date: Wed, 23 Mar 2011 00:05:11 +0100	[thread overview]
Message-ID: <1300835111.1815.69.camel@zag> (raw)
In-Reply-To: <201103222305.01808.rjw@sisk.pl>

On Tue, 2011-03-22 at 23:05 +0100, Rafael J. Wysocki wrote:
> On Tuesday, March 22, 2011, Kay Sievers wrote:

> >> Because they are devices, and there is a lot to win, if the kernel
> > exports all "devices" in the same way. This is not about saving an inode
> > in /sys, it's the ability to do runtime device configuration with common
> > tools.
> 
> If I understand you correctly, the goal is to have everything under
> /sys/devices/ been represented by struct device objects and there are good
> reasons to do that.
> 
> In that case we either have to move the things exported via sysdevs somewhere
> else (presumably having to create that "somewhere" before), or we have to
> introduce struct device objects specifically for exporting them.  I don't
> really think the latter approach will be very popular, so quite likely we'll
> need to have a plan for moving those things to different locations.

Ok, now that we sorted the misunderstanding out, let's start this topic
from here again. (I really read your reply as: "let's move the CPUS
somewhere else")


What's the list of stuff you discovered using sysdevs, which is not a
device at all, and has never more than a single instance of stuff of the
same type? The clocksource?

And let's find some place for them to put their properties instead of
messing around with device from the driver core.

Kay


  parent reply	other threads:[~2011-03-22 23:05 UTC|newest]

Thread overview: 83+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-03-10  0:31 [RFC][PATCH 0/2] Allow subsystems to avoid using sysdevs for defining "core" PM callbacks Rafael J. Wysocki
2011-03-10  0:33 ` [RFC][PATCH 1/2] Introduce struct syscore_ops and related functionality Rafael J. Wysocki
2011-03-10  3:33   ` [linux-pm] " Alan Stern
2011-03-10 10:42     ` Rafael J. Wysocki
2011-03-10 11:30     ` [RFC][Update][PATCH " Rafael J. Wysocki
2011-03-11 17:11       ` Greg KH
2011-03-11 20:13         ` Rafael J. Wysocki
2011-03-11 20:16           ` Greg KH
2011-03-11 20:33             ` Rafael J. Wysocki
2011-03-10  0:34 ` [RFC][PATCH 2/2] Convert several sysdev users to using struct syscore_ops Rafael J. Wysocki
2011-03-11 17:12   ` Greg KH
2011-03-11 20:29     ` Rafael J. Wysocki
2011-03-11 20:33       ` Greg KH
2011-03-11 20:45         ` Rafael J. Wysocki
2011-03-10 13:05 ` [RFC][PATCH 0/2] Allow subsystems to avoid using sysdevs for defining "core" PM callbacks Kay Sievers
2011-03-10 19:04   ` Rafael J. Wysocki
2011-03-12 21:12 ` [PATCH 0/8] " Rafael J. Wysocki
2011-03-12 21:13   ` [PATCH 1/8] PM / Core: Introcude struct syscore_ops Rafael J. Wysocki
2011-03-12 21:15   ` [PATCH 2/8] x86: Use syscore_ops instead of sysdev classes and sysdevs Rafael J. Wysocki
2011-03-13 14:23     ` Thomas Gleixner
2011-03-13 15:07       ` Rafael J. Wysocki
2011-03-12 21:16   ` [PATCH 3/8] ACPI: Use syscore_ops instead of sysdev class and sysdev Rafael J. Wysocki
2011-03-18 21:38     ` Len Brown
2011-03-12 21:17   ` [PATCH 4/8] timekeeping: " Rafael J. Wysocki
2011-03-13 13:56     ` Thomas Gleixner
2011-03-13 15:08       ` Rafael J. Wysocki
2011-03-12 21:18   ` [PATCH 5/8] PCI / Intel IOMMU: " Rafael J. Wysocki
2011-06-02 17:30     ` Tony Luck
2011-06-06 17:57       ` Rafael J. Wysocki
2011-06-06 17:58         ` Luck, Tony
2011-03-12 21:18   ` [PATCH 6/8] KVM: " Rafael J. Wysocki
2011-03-12 21:20   ` [PATCH 7/8] cpufreq: Use syscore_ops for boot CPU suspend/resume Rafael J. Wysocki
2011-03-15 21:43     ` [Update, v2] " Rafael J. Wysocki
2011-03-12 21:21   ` [PATCH 8/8] Introduce ARCH_NO_SYSDEV_OPS config option Rafael J. Wysocki
2011-03-13 13:55     ` Thomas Gleixner
2011-03-13 15:30       ` [Update] " Rafael J. Wysocki
2011-03-13 13:02   ` [PATCH 9-10/10] Allow subsystems to avoid using sysdevs for defining "core" PM callbacks Rafael J. Wysocki
2011-03-13 13:03     ` [PATCH 9/10] sh: Use struct syscore_ops instead of sysdev class and sysdev R. J. Wysocki
2011-03-17  8:20       ` Paul Mundt
2011-03-19  0:47         ` Rafael J. Wysocki
2011-03-22 14:04           ` Paul Mundt
2011-03-22 14:19             ` Kay Sievers
2011-03-22 20:30               ` Rafael J. Wysocki
2011-03-22 20:39                 ` Kay Sievers
2011-03-22 21:00                   ` Rafael J. Wysocki
2011-03-22 21:12                     ` Kay Sievers
2011-03-22 21:49                       ` Paul Mundt
2011-03-22 22:00                         ` Kay Sievers
2011-03-22 22:23                           ` Rafael J. Wysocki
2011-03-22 22:44                             ` Kay Sievers
2011-03-22 23:32                               ` Rafael J. Wysocki
2011-03-22 23:46                                 ` Kay Sievers
2011-03-22 23:50                                   ` Rafael J. Wysocki
2011-03-23  9:45                               ` Russell King - ARM Linux
2011-03-22 22:23                           ` Paul Mundt
2011-03-23 11:12                             ` Mark Brown
2011-03-23 11:28                               ` Paul Mundt
2011-03-22 22:05                       ` Rafael J. Wysocki
2011-03-22 22:20                         ` Kay Sievers
2011-03-22 22:42                           ` Rafael J. Wysocki
2011-03-22 22:56                             ` Kay Sievers
2011-03-22 23:05                         ` Kay Sievers [this message]
2011-03-22 23:47                           ` Rafael J. Wysocki
2011-03-22 20:19             ` Rafael J. Wysocki
2011-03-23  9:59               ` Paul Mundt
2011-03-23 20:39                 ` Rafael J. Wysocki
2011-03-13 13:04     ` [PATCH 10/10] ARM: Use struct syscore_ops instead of sysdevs for PM in timer and leds Rafael J. Wysocki
2011-03-14  9:06       ` Stephen Boyd
2011-03-14 19:54         ` [Update] " Rafael J. Wysocki
2011-03-21 23:31   ` [PATCH 0/6] Do not use sysdevs for implementing "core" PM operations on x86 Rafael J. Wysocki
2011-03-21 23:34     ` [PATCH 1/6] x86: Use syscore_ops instead of sysdev classes and sysdevs Rafael J. Wysocki
2011-03-21 23:35     ` [PATCH 2/6] timekeeping: Use syscore_ops instead of sysdev class and sysdev Rafael J. Wysocki
2011-03-21 23:36     ` [PATCH 3/6] PCI / Intel IOMMU: " Rafael J. Wysocki
2011-03-22 10:57       ` Joerg Roedel
2011-03-22 22:07         ` Rafael J. Wysocki
2011-03-23  7:48           ` Roedel, Joerg
2011-03-21 23:37     ` [PATCH 4/6] KVM: " Rafael J. Wysocki
2011-03-22  9:18       ` Avi Kivity
2011-03-21 23:38     ` [PATCH 5/6] cpufreq: Use syscore_ops for boot CPU suspend/resume (v2) Rafael J. Wysocki
2011-03-21 23:38     ` [PATCH 6/6] Introduce ARCH_NO_SYSDEV_OPS config option (v2) Rafael J. Wysocki
2011-03-22 10:32     ` [PATCH 0/6] Do not use sysdevs for implementing "core" PM operations on x86 Ingo Molnar
2011-03-22 20:33       ` Rafael J. Wysocki
2011-03-25 22:51         ` [GIT PULL] More power management updates for 2.6.39 Rafael J. Wysocki

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