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| author | Jeff Garzik <jeff@garzik.org> | 2006-03-24 09:24:04 -0500 |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2006-03-24 09:24:04 -0500 |
| commit | 11ed56fb7899f9eb9eaef8e5919db1bf08f1b07e (patch) | |
| tree | b01421cb139b11065d776ed361a7a12b3a1aecc9 /lib/kref.c | |
| parent | 54da9a3968448681d0ddf193ec90f2480c5cba1c (diff) | |
| parent | 2cc432eed0491df66e14b578139bba2c75fb3f9a (diff) | |
Merge branch 'upstream'
Conflicts:
drivers/scsi/sata_vsc.c
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 0d07cc31c818..4a467faf1367 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; } |