diff options
Diffstat (limited to 'block/blk.h')
| -rw-r--r-- | block/blk.h | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/block/blk.h b/block/blk.h index 73bd3b1c6938..8c3f557dd898 100644 --- a/block/blk.h +++ b/block/blk.h @@ -378,19 +378,18 @@ int bdev_resize_partition(struct block_device *bdev, int partno, int disk_expand_part_tbl(struct gendisk *disk, int target); int hd_ref_init(struct hd_struct *part); -static inline void hd_struct_get(struct hd_struct *part) -{ - percpu_ref_get(&part->ref); -} - +/* no need to get/put refcount of part0 */ static inline int hd_struct_try_get(struct hd_struct *part) { - return percpu_ref_tryget_live(&part->ref); + if (part->partno) + return percpu_ref_tryget_live(&part->ref); + return 1; } static inline void hd_struct_put(struct hd_struct *part) { - percpu_ref_put(&part->ref); + if (part->partno) + percpu_ref_put(&part->ref); } static inline void hd_free_part(struct hd_struct *part) |