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| author | James Bottomley <jejb@mulgrave.il.steeleye.com> | 2006-03-21 13:05:45 -0600 |
|---|---|---|
| committer | James Bottomley <jejb@mulgrave.il.steeleye.com> | 2006-03-21 13:05:45 -0600 |
| commit | d04cdb64212eb5ae6a98026a97dda626e40e8e9a (patch) | |
| tree | b6a7dbb21ccfceb915844e9a330b3d3dfcaf3c5b /lib/kref.c | |
| parent | 2f8600dff2b140096a7df781884e918a16aa90e0 (diff) | |
| parent | ec1248e70edc5cf7b485efcc7b41e44e10f422e5 (diff) | |
Merge ../linux-2.6
Diffstat (limited to 'lib/kref.c')
| -rw-r--r-- | lib/kref.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/lib/kref.c b/lib/kref.c index 0d07cc31c81..4a467faf136 100644 --- a/lib/kref.c +++ b/lib/kref.c @@ -52,7 +52,12 @@ int kref_put(struct kref *kref, void (*release)(struct kref *kref)) WARN_ON(release == NULL); WARN_ON(release == (void (*)(struct kref *))kfree); - if (atomic_dec_and_test(&kref->refcount)) { + /* + * if current count is one, we are the last user and can release object + * right now, avoiding an atomic operation on 'refcount' + */ + if ((atomic_read(&kref->refcount) == 1) || + (atomic_dec_and_test(&kref->refcount))) { release(kref); return 1; } |