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| author | Evgeniy Polyakov <johnpol@2ka.mipt.ru> | 2007-12-10 23:03:43 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2008-01-24 20:40:05 -0800 |
| commit | 41ca28ab2abd76dc203e2c3a7cd609607cb927c3 (patch) | |
| tree | 9197e7582b4654796914090026e1afed2628d101 | |
| parent | 775b64d2b6ca37697de925f70799c710aab5849a (diff) | |
| download | linux-41ca28ab2abd76dc203e2c3a7cd609607cb927c3.tar.bz2 | |
kref: add kref_set()
This adds kref_set() to the kref api for future use by people who really
know what they are doing with krefs...
From: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
Cc: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | include/linux/kref.h | 1 | ||||
| -rw-r--r-- | lib/kref.c | 15 |
2 files changed, 14 insertions, 2 deletions
diff --git a/include/linux/kref.h b/include/linux/kref.h index 6fee3539893f..5d185635786e 100644 --- a/include/linux/kref.h +++ b/include/linux/kref.h @@ -24,6 +24,7 @@ struct kref { atomic_t refcount; }; +void kref_set(struct kref *kref, int num); void kref_init(struct kref *kref); void kref_get(struct kref *kref); int kref_put(struct kref *kref, void (*release) (struct kref *kref)); diff --git a/lib/kref.c b/lib/kref.c index a6dc3ec328e0..9ecd6e865610 100644 --- a/lib/kref.c +++ b/lib/kref.c @@ -15,13 +15,23 @@ #include <linux/module.h> /** + * kref_set - initialize object and set refcount to requested number. + * @kref: object in question. + * @num: initial reference counter + */ +void kref_set(struct kref *kref, int num) +{ + atomic_set(&kref->refcount, num); + smp_mb(); +} + +/** * kref_init - initialize object. * @kref: object in question. */ void kref_init(struct kref *kref) { - atomic_set(&kref->refcount,1); - smp_mb(); + kref_set(kref, 1); } /** @@ -61,6 +71,7 @@ int kref_put(struct kref *kref, void (*release)(struct kref *kref)) return 0; } +EXPORT_SYMBOL(kref_set); EXPORT_SYMBOL(kref_init); EXPORT_SYMBOL(kref_get); EXPORT_SYMBOL(kref_put); |