diff options
| author | Bart Van Assche <bart.vanassche@sandisk.com> | 2017-02-09 17:28:50 -0800 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2017-06-12 13:20:20 +0200 |
| commit | 19e72d3abb63cb16d021a4066ce1a18880509e99 (patch) | |
| tree | 4d8228390a3f8b4697552bfa807232f71731bd8f | |
| parent | ba80aa909c99802c428682c352b0ee0baac0acd3 (diff) | |
configfs: Introduce config_item_get_unless_zero()
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
[hch: minor style tweak]
Signed-off-by: Christoph Hellwig <hch@lst.de>
| -rw-r--r-- | fs/configfs/item.c | 8 | ||||
| -rw-r--r-- | include/linux/configfs.h | 3 |
2 files changed, 10 insertions, 1 deletions
diff --git a/fs/configfs/item.c b/fs/configfs/item.c index 8b2a994042dd..a66f6624d899 100644 --- a/fs/configfs/item.c +++ b/fs/configfs/item.c @@ -138,6 +138,14 @@ struct config_item *config_item_get(struct config_item *item) } EXPORT_SYMBOL(config_item_get); +struct config_item *config_item_get_unless_zero(struct config_item *item) +{ + if (item && kref_get_unless_zero(&item->ci_kref)) + return item; + return NULL; +} +EXPORT_SYMBOL(config_item_get_unless_zero); + static void config_item_cleanup(struct config_item *item) { struct config_item_type *t = item->ci_type; diff --git a/include/linux/configfs.h b/include/linux/configfs.h index 2319b8c108e8..c96709049683 100644 --- a/include/linux/configfs.h +++ b/include/linux/configfs.h @@ -74,7 +74,8 @@ extern void config_item_init_type_name(struct config_item *item, const char *name, struct config_item_type *type); -extern struct config_item * config_item_get(struct config_item *); +extern struct config_item *config_item_get(struct config_item *); +extern struct config_item *config_item_get_unless_zero(struct config_item *); extern void config_item_put(struct config_item *); struct config_item_type { |