From: Greg Kroah-Hartman <gregkh@linuxfoundation•org>
To: David Hildenbrand <david@redhat•com>
Cc: Heiko Carstens <heiko.carstens@de•ibm.com>,
Michal Hocko <mhocko@suse•com>,
"Rafael J. Wysocki" <rafael@kernel•org>,
Benjamin Herrenschmidt <benh@kernel•crashing.org>,
Linux Memory Management List <linux-mm@kvack•org>,
Paul Mackerras <paulus@samba•org>,
linux-s390@vger•kernel.org, sthemmin@microsoft•com,
Pavel Tatashin <pasha.tatashin@oracle•com>,
ACPI Devel Maling List <linux-acpi@vger•kernel.org>,
David Rientjes <rientjes@google•com>,
xen-devel@lists•xenproject.org, Len Brown <lenb@kernel•org>,
haiyangz@microsoft•com, Dan Williams <dan.j.williams@intel•com>,
Vitaly Kuznetsov <vkuznets@redhat•com>,
Vlastimil Babka <vbabka@suse•cz>,
osalvador@suse•de, "Rafael J. Wysocki" <rjw@rjwysocki•net>,
Linux Kernel Mailing List <linux-kernel@vger•kernel.org>,
Martin Schwidefsky <schwidefsky@de•ibm.com>,
devel@linuxdriverproject•org,
Andrew Morton <akpm@linux-foundation•org>,
linuxppc-dev <linuxppc-dev@lists•ozlabs.org>
Subject: Re: [PATCH RFC 1/2] drivers/base: export lock_device_hotplug/unlock_device_hotplug
Date: Fri, 17 Aug 2018 19:02:39 +0200 [thread overview]
Message-ID: <20180817170239.GF24945@kroah.com> (raw)
In-Reply-To: <ecc08303-96ee-76ad-fba4-0425413afa5a@redhat.com>
On Fri, Aug 17, 2018 at 01:56:35PM +0200, David Hildenbrand wrote:
> E.g. When adding the memory block devices, we know that there won't be a
> driver to attach to (as there are no drivers for the "memory" subsystem)
> - the bus_probe_device() function that takes the device_lock() could
> pretty much be avoided for that case. But burying such special cases
> down in core driver code definitely won't make locking related to memory
> hotplug easier.
You don't have to have a driver for a device if you don't want to, or
you can just have a default one for all memory devices if you somehow
need it. No reason to not do this if it makes things easier for you.
thanks,
greg k-h
next prev parent reply other threads:[~2018-08-17 17:02 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-17 7:58 [PATCH RFC 0/2] mm: online/offline_pages called w.o. mem_hotplug_lock David Hildenbrand
2018-08-17 7:59 ` [PATCH RFC 1/2] drivers/base: export lock_device_hotplug/unlock_device_hotplug David Hildenbrand
2018-08-17 8:41 ` Greg Kroah-Hartman
2018-08-17 8:56 ` David Hildenbrand
2018-08-17 9:03 ` Rafael J. Wysocki
2018-08-17 9:41 ` David Hildenbrand
2018-08-17 10:06 ` Greg Kroah-Hartman
2018-08-17 11:04 ` David Hildenbrand
2018-08-17 11:28 ` Heiko Carstens
2018-08-17 11:56 ` David Hildenbrand
2018-08-17 17:02 ` Greg Kroah-Hartman [this message]
2018-08-17 8:57 ` Rafael J. Wysocki
2018-08-17 7:59 ` [PATCH RFC 2/2] mm/memory_hotplug: fix online/offline_pages called w.o. mem_hotplug_lock David Hildenbrand
2018-08-17 8:20 ` Rafael J. Wysocki
2018-08-17 8:27 ` David Hildenbrand
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20180817170239.GF24945@kroah.com \
--to=gregkh@linuxfoundation$(echo .)org \
--cc=akpm@linux-foundation$(echo .)org \
--cc=benh@kernel$(echo .)crashing.org \
--cc=dan.j.williams@intel$(echo .)com \
--cc=david@redhat$(echo .)com \
--cc=devel@linuxdriverproject$(echo .)org \
--cc=haiyangz@microsoft$(echo .)com \
--cc=heiko.carstens@de$(echo .)ibm.com \
--cc=lenb@kernel$(echo .)org \
--cc=linux-acpi@vger$(echo .)kernel.org \
--cc=linux-kernel@vger$(echo .)kernel.org \
--cc=linux-mm@kvack$(echo .)org \
--cc=linux-s390@vger$(echo .)kernel.org \
--cc=linuxppc-dev@lists$(echo .)ozlabs.org \
--cc=mhocko@suse$(echo .)com \
--cc=osalvador@suse$(echo .)de \
--cc=pasha.tatashin@oracle$(echo .)com \
--cc=paulus@samba$(echo .)org \
--cc=rafael@kernel$(echo .)org \
--cc=rientjes@google$(echo .)com \
--cc=rjw@rjwysocki$(echo .)net \
--cc=schwidefsky@de$(echo .)ibm.com \
--cc=sthemmin@microsoft$(echo .)com \
--cc=vbabka@suse$(echo .)cz \
--cc=vkuznets@redhat$(echo .)com \
--cc=xen-devel@lists$(echo .)xenproject.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox