diff options
| author | David S. Miller <davem@davemloft.net> | 2012-08-31 15:14:10 -0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-08-31 15:14:18 -0400 |
| commit | c32f38619af6302da58835fb292b159bdd96d11f (patch) | |
| tree | a5bb4a9c51999557eaa919f27369c70811cd813c /include/linux/kref.h | |
| parent | 761743ebc92df72053e736fce953a5d2e90099d5 (diff) | |
| parent | 0dcd5052c8543ef999bcd252cee50b7ae8111e89 (diff) | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Merge the 'net' tree to get the recent set of netfilter bug fixes in
order to assist with some merge hassles Pablo is going to have to deal
with for upcoming changes.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/kref.h')
| -rw-r--r-- | include/linux/kref.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/include/linux/kref.h b/include/linux/kref.h index 9c07dcebded..65af6887872 100644 --- a/include/linux/kref.h +++ b/include/linux/kref.h @@ -18,6 +18,7 @@ #include <linux/bug.h> #include <linux/atomic.h> #include <linux/kernel.h> +#include <linux/mutex.h> struct kref { atomic_t refcount; @@ -93,4 +94,21 @@ static inline int kref_put(struct kref *kref, void (*release)(struct kref *kref) { return kref_sub(kref, 1, release); } + +static inline int kref_put_mutex(struct kref *kref, + void (*release)(struct kref *kref), + struct mutex *lock) +{ + WARN_ON(release == NULL); + if (unlikely(!atomic_add_unless(&kref->refcount, -1, 1))) { + mutex_lock(lock); + if (unlikely(!atomic_dec_and_test(&kref->refcount))) { + mutex_unlock(lock); + return 0; + } + release(kref); + return 1; + } + return 0; +} #endif /* _KREF_H_ */ |