diff options
| author | Jerome Marchand <jmarchan@redhat.com> | 2011-01-05 16:57:37 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-02-17 15:14:17 -0800 |
| commit | 07384b42b672c8ea266ea4ba50c5e50c9323ae9f (patch) | |
| tree | 6dd77da4aa14e5e090c89c75f3625e22c87ee74b /include | |
| parent | c4b03cd47360e5eb751adf2a5f96e7edcfde9821 (diff) | |
kref: add kref_test_and_get
commit e4a683c899cd5a49f8d684a054c95bd115a0c005 upstream.
Add kref_test_and_get() function, which atomically add a reference only if
refcount is not zero. This prevent to add a reference to an object that is
already being removed.
Signed-off-by: Jerome Marchand <jmarchan@redhat.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/kref.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/kref.h b/include/linux/kref.h index 6cc38fc07ab7..90b9e44abf54 100644 --- a/include/linux/kref.h +++ b/include/linux/kref.h @@ -23,6 +23,7 @@ struct kref { void kref_init(struct kref *kref); void kref_get(struct kref *kref); +int kref_test_and_get(struct kref *kref); int kref_put(struct kref *kref, void (*release) (struct kref *kref)); #endif /* _KREF_H_ */ |