btrfs: show options: use helper to convert compression type string

Use the helper, if the COMPRESS option is set, the result is always
defined and not empty.

Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 84707e77c051d8e71d86b88f21f20fb0bc14f31f..baa8add64681cf753d1fca97d378423d07548672 100644 (file)
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -1243,7 +1243,7 @@ int btrfs_sync_fs(struct super_block *sb, int wait)
 static int btrfs_show_options(struct seq_file *seq, struct dentry *dentry)
 {
        struct btrfs_fs_info *info = btrfs_sb(dentry->d_sb);
-       char *compress_type;
+       const char *compress_type;
 
        if (btrfs_test_opt(info, DEGRADED))
                seq_puts(seq, ",degraded");
@@ -1259,12 +1259,7 @@ static int btrfs_show_options(struct seq_file *seq, struct dentry *dentry)
                                             num_online_cpus() + 2, 8))
                seq_printf(seq, ",thread_pool=%d", info->thread_pool_size);
        if (btrfs_test_opt(info, COMPRESS)) {
-               if (info->compress_type == BTRFS_COMPRESS_ZLIB)
-                       compress_type = "zlib";
-               else if (info->compress_type == BTRFS_COMPRESS_LZO)
-                       compress_type = "lzo";
-               else
-                       compress_type = "zstd";
+               compress_type = btrfs_compress_type2str(info->compress_type);
                if (btrfs_test_opt(info, FORCE_COMPRESS))
                        seq_printf(seq, ",compress-force=%s", compress_type);
                else