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| author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2012-10-21 17:57:19 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-10-22 08:50:37 +0300 |
| commit | 2f0157f13f42800aa3d9017ebb0fb80a65f7b2de (patch) | |
| tree | 7b2b3299b6ef785790336042ab28c0bffa37debb /fs/fifo.c | |
| parent | 6f0c0580b70c89094b3422ba81118c7b959c7556 (diff) | |
char_dev: pin parent kobject
In certain cases (for example when a cdev structure is embedded into
another object whose lifetime is controlled by a separate kobject) it is
beneficial to tie lifetime of another object to the lifetime of
character device so that related object is not freed until after
char_dev object is freed.
To achieve this let's pin kobject's parent when doing cdev_add() and
unpin when last reference to cdev structure is being released.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/fifo.c')
0 files changed, 0 insertions, 0 deletions