btrfs: use better definition of number of compression type
authorChengguang Xu <cgxu519@mykernel.net>
Thu, 10 Oct 2019 07:59:57 +0000 (15:59 +0800)
committerDavid Sterba <dsterba@suse.com>
Mon, 18 Nov 2019 11:46:55 +0000 (12:46 +0100)
commitce96b7ffd11e261ef2ecd6817b7572a77750170d
tree653bc44cc799199b3d61d161689b320ae41b9858
parentb9b1a53e180e2ab4cea42c95bf344e4bf7f524e7
btrfs: use better definition of number of compression type

The compression type upper limit constant is the same as the last value
and this is confusing.  In order to keep coding style consistent, use
BTRFS_NR_COMPRESS_TYPES as the total number that follows the idom of
'NR' being one more than the last value.

Signed-off-by: Chengguang Xu <cgxu519@mykernel.net>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
fs/btrfs/compression.c
fs/btrfs/compression.h
fs/btrfs/ioctl.c
fs/btrfs/tree-checker.c