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| author | Trond Myklebust <Trond.Myklebust@netapp.com> | 2006-03-23 23:44:19 -0500 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2006-03-23 23:44:19 -0500 |
| commit | 1ebbe2b20091d306453a5cf480a87e6cd28ae76f (patch) | |
| tree | f5cd7a0fa69b8b1938cb5a0faed2e7b0628072a5 /lib/kref.c | |
| parent | ac58c9059da8886b5e8cde012a80266b18ca146e (diff) | |
| parent | 674a396c6d2ba0341ebdd7c1c9950f32f018e2dd (diff) | |
Merge branch 'linus'
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; } |