From: Al Viro <viro@ZenIV.linux.org.uk>
To: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Dave Jones <davej@redhat.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
linux-kernel@vger.kernel.org, linux-input@vger.kernel.org
Subject: Re: [PATCH 1/2] char_dev: allow setting up and pinning parent devices
Date: Sun, 21 Oct 2012 08:39:28 +0100 [thread overview]
Message-ID: <20121021073928.GV2616@ZenIV.linux.org.uk> (raw)
In-Reply-To: <1350804271-2449-1-git-send-email-dmitry.torokhov@gmail.com>
On Sun, Oct 21, 2012 at 12:24:30AM -0700, Dmitry Torokhov wrote:
> In certain cases (for example when a cdev structure is embedded into
> another object whose lifetime is controlled by a separate device object)
> it is beneficial to tie lifetime of another struct device to the lifetime
> of character device so that related object is not freed until after
> char_dev object is freed. To achieve this allow setting a "parent" device
> for character devices and pin them when doing cdev_add() and unpin when
> last reference to cdev structure is being released.
Why struct device and not simply struct kobject?
next prev parent reply other threads:[~2012-10-21 7:39 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-19 14:43 weird use-after-free bug in module_put Dave Jones
2012-10-19 15:34 ` Dave Jones
2012-10-19 16:33 ` Dmitry Torokhov
2012-10-19 17:09 ` Al Viro
2012-10-19 17:36 ` Dmitry Torokhov
2012-10-19 17:50 ` Al Viro
2012-10-19 18:12 ` Dmitry Torokhov
2012-10-21 7:24 ` [PATCH 1/2] char_dev: allow setting up and pinning parent devices Dmitry Torokhov
2012-10-21 7:24 ` [PATCH 2/2] Input: fix use-after-free introduced with dynamic minor changes Dmitry Torokhov
2012-10-21 7:39 ` Al Viro [this message]
2012-10-21 8:13 ` [PATCH 1/2] char_dev: allow setting up and pinning parent devices Dmitry Torokhov
2012-10-22 0:57 ` [PATCH 1/2] char_dev: pin parent kobject Dmitry Torokhov
2012-10-22 0:57 ` [PATCH 2/2] Input: fix use-after-free introduced with dynamic minor changes Dmitry Torokhov
2012-10-22 5:02 ` [PATCH 1/2] char_dev: pin parent kobject Linus Torvalds
2012-10-22 5:42 ` Al Viro
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