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| author | Jerome Marchand <jmarchan@redhat.com> | 2011-01-05 16:57:37 +0100 |
|---|---|---|
| committer | Jens Axboe <jaxboe@fusionio.com> | 2011-01-05 16:57:37 +0100 |
| commit | e4a683c899cd5a49f8d684a054c95bd115a0c005 (patch) | |
| tree | c7e79e24199a5ed34a488b06cfd3fa890637db7d /include/linux | |
| parent | a6e8dc46ff0b7defbfa4f29a71aee263377ec573 (diff) | |
| download | linux-next-e4a683c899cd5a49f8d684a054c95bd115a0c005.tar.gz | |
kref: add kref_test_and_get
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>
Cc: stable@kernel.org
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Diffstat (limited to 'include/linux')
| -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_ */ |