f2fs: compress: disable compression mount option if compression is off

If CONFIG_F2FS_FS_COMPRESSION is off, don't allow to configure or
show compression related mount option.
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

fs/f2fs/super.c

@@ -460,9 +460,12 @@ static int parse_options(struct super_block *sb, char *options, bool is_remount)
 {
 	struct f2fs_sb_info *sbi = F2FS_SB(sb);
 	substring_t args[MAX_OPT_ARGS];
+#ifdef CONFIG_F2FS_FS_COMPRESSION
 	unsigned char (*ext)[F2FS_EXTENSION_LEN];
+	int ext_cnt;
+#endif
 	char *p, *name;
-	int arg = 0, ext_cnt;
+	int arg = 0;
 	kuid_t uid;
 	kgid_t gid;
 	int ret;
@@ -853,6 +856,7 @@ static int parse_options(struct super_block *sb, char *options, bool is_remount)
 		case Opt_checkpoint_enable:
 			clear_opt(sbi, DISABLE_CHECKPOINT);
 			break;
+#ifdef CONFIG_F2FS_FS_COMPRESSION
 		case Opt_compress_algorithm:
 			if (!f2fs_sb_has_compression(sbi)) {
 				f2fs_err(sbi, "Compression feature if off");
@@ -918,6 +922,13 @@ static int parse_options(struct super_block *sb, char *options, bool is_remount)
 			F2FS_OPTION(sbi).compress_ext_cnt++;
 			kfree(name);
 			break;
+#else
+		case Opt_compress_algorithm:
+		case Opt_compress_log_size:
+		case Opt_compress_extension:
+			f2fs_info(sbi, "compression options not supported");
+			break;
+#endif
 		default:
 			f2fs_err(sbi, "Unrecognized mount option \"%s\" or missing value",
 				 p);
@@ -1608,7 +1619,9 @@ static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
 	else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_NOBARRIER)
 		seq_printf(seq, ",fsync_mode=%s", "nobarrier");
 
+#ifdef CONFIG_F2FS_FS_COMPRESSION
 	f2fs_show_compress_options(seq, sbi->sb);
+#endif
 	return 0;
 }