Messages in this thread | | | Date | Sun, 21 Oct 2012 08:39:28 +0100 | From | Al Viro <> | Subject | Re: [PATCH 1/2] char_dev: allow setting up and pinning parent devices |
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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?
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