From: Tejun Heo <htejun@gmail.com>
To: Cornelia Huck <cornelia.huck@de.ibm.com>
Cc: gregkh@suse.de, hugh@veritas.com, dmitry.torokhov@gmail.com,
oneukum@suse.de, maneesh@in.ibm.com, rpurdie@rpsys.net,
James.Bottomley@SteelEye.com, Jeff Garzik <jgarzik@pobox.com>,
lkml <linux-kernel@vger.kernel.org>,
"linux-ide@vger.kernel.org" <linux-ide@vger.kernel.org>,
SCSI Mailing List <linux-scsi@vger.kernel.org>
Subject: Re: [RFD driver-core] Lifetime problems of the current driver model
Date: Sun, 01 Apr 2007 01:14:15 +0900 [thread overview]
Message-ID: <460E88D7.3010702@gmail.com> (raw)
In-Reply-To: <20070331180806.55d572c8@gondolin.boeblingen.de.ibm.com>
Cornelia Huck wrote:
> On Sat, 31 Mar 2007 12:12:48 +0900,
> Tejun Heo <htejun@gmail.com> wrote:
>
>>> Hm, but as long as dk0 is registered, it can be looked up and someone
>>> could get a reference on it.
>> Yeah, exactly. That's why any getting any kobject reference backed by a
>> module must be accompanied by try_module_get().
>>
>> int mydrv_get_dk(struct dk *dk)
>> {
>> rc = try_module_get(mydrv);
>> if (rc)
>> return rc;
>> kobject_get(&dk->kobj);
>> return 0;
>> }
>
> This works if the caller always knows which module to grab (I was
> thinking about some tree-walking code).
Yeah, that's why we have so many ->owner's and getting it wrong results
in jumping to non-existent address.
--
tejun
next prev parent reply other threads:[~2007-03-31 16:14 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <460CDBA6.5030608@gmail.com>
2007-03-30 12:29 ` [RFD driver-core] Lifetime problems of the current driver model James Bottomley
2007-03-30 13:15 ` Dmitry Torokhov
2007-03-30 13:38 ` Tejun Heo
[not found] ` <460D12B8.6050101@gmail.com>
2007-03-30 17:41 ` Greg KH
2007-03-30 18:19 ` James Bottomley
2007-04-01 19:59 ` Tejun Heo
2007-04-02 9:20 ` Cornelia Huck
2007-04-02 15:34 ` Cornelia Huck
2007-04-03 3:08 ` Tejun Heo
2007-04-02 9:33 ` Greg KH
2007-04-02 12:10 ` Maneesh Soni
2007-04-02 19:33 ` Luben Tuikov
[not found] ` <d120d5000703300615y7b367d82hb42f1c58ca8a6328@mail.gmail.com>
2007-03-30 17:58 ` James Bottomley
2007-03-30 18:18 ` Dmitry Torokhov
2007-03-30 13:19 ` Cornelia Huck
2007-03-30 13:19 ` Tejun Heo
2007-03-30 13:40 ` Cornelia Huck
2007-03-30 13:58 ` Tejun Heo
2007-03-30 14:52 ` Cornelia Huck
2007-03-30 15:08 ` Tejun Heo
2007-03-30 19:31 ` Cornelia Huck
2007-03-31 3:12 ` Tejun Heo
2007-03-31 3:15 ` Tejun Heo
2007-03-31 16:08 ` Cornelia Huck
2007-03-31 16:14 ` Tejun Heo [this message]
2007-04-02 19:24 ` Luben Tuikov
2007-03-30 17:38 ` Greg KH
2007-03-30 9:43 Tejun Heo
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=460E88D7.3010702@gmail.com \
--to=htejun@gmail.com \
--cc=James.Bottomley@SteelEye.com \
--cc=cornelia.huck@de.ibm.com \
--cc=dmitry.torokhov@gmail.com \
--cc=gregkh@suse.de \
--cc=hugh@veritas.com \
--cc=jgarzik@pobox.com \
--cc=linux-ide@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-scsi@vger.kernel.org \
--cc=maneesh@in.ibm.com \
--cc=oneukum@suse.de \
--cc=rpurdie@rpsys.net \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
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;
as well as URLs for NNTP newsgroup(s).