Btrfs: add ref_count and free function for btrfs_bio
authorZhao Lei <zhaolei@cn.fujitsu.com>
Tue, 20 Jan 2015 07:11:34 +0000 (15:11 +0800)
committerChris Mason <clm@fb.com>
Thu, 22 Jan 2015 02:06:48 +0000 (18:06 -0800)
commit6e9606d2a2dce098c1739fb3cd82a1c34fd73d3a
treeeeeb1c991d4971cdbfda675bbbb4b37b0c6f5ebb
parent8e5cfb55d3f7dc764cd7f4c966d4c2687eaf7569
Btrfs: add ref_count and free function for btrfs_bio

1: ref_count is simple than current RBIO_HOLD_BBIO_MAP_BIT flag
   to keep btrfs_bio's memory in raid56 recovery implement.
2: free function for bbio will make code clean and flexible, plus
   forced data type checking in compile.

Changelog v1->v2:
 Rename following by David Sterba's suggestion:
 put_btrfs_bio() -> btrfs_put_bio()
 get_btrfs_bio() -> btrfs_get_bio()
 bbio->ref_count -> bbio->refs

Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>
fs/btrfs/extent-tree.c
fs/btrfs/extent_io.c
fs/btrfs/raid56.c
fs/btrfs/reada.c
fs/btrfs/scrub.c
fs/btrfs/volumes.c
fs/btrfs/volumes.h