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btrfs: use better definition of number of compression type

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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>
This commit is contained in:
Chengguang Xu
2019-10-10 15:59:57 +08:00
committed by David Sterba
parent b9b1a53e18
commit ce96b7ffd1
4 changed files with 7 additions and 5 deletions
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fs/btrfs/ioctl.c
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@@ -1409,7 +1409,7 @@ int btrfs_defrag_file(struct inode *inode, struct file *file,
return -EINVAL;
if (do_compress) {
if (range->compress_type > BTRFS_COMPRESS_TYPES)
if (range->compress_type >= BTRFS_NR_COMPRESS_TYPES)
return -EINVAL;
if (range->compress_type)
compress_type = range->compress_type;