[PATCH] erofs: hide "cache_strategy=" for plain filesystems

"cache_strategy=" is meaningless and confusing on unencoded EROFS
filesystems; gate it on compressed images only since it's now possible
after commit 7cef3c834194 ("erofs: separate plain and compressed
filesystems formally").

Signed-off-by: Gao Xiang <[email protected]>
---
 fs/erofs/super.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/erofs/super.c b/fs/erofs/super.c
index 86fa5c6a0c70..85674b08f66e 100644
--- a/fs/erofs/super.c
+++ b/fs/erofs/super.c
@@ -1038,7 +1038,7 @@ static int erofs_show_options(struct seq_file *seq, struct dentry *root)
 				",user_xattr" : ",nouser_xattr");
 	if (IS_ENABLED(CONFIG_EROFS_FS_POSIX_ACL))
 		seq_puts(seq, test_opt(opt, POSIX_ACL) ? ",acl" : ",noacl");
-	if (IS_ENABLED(CONFIG_EROFS_FS_ZIP))
+	if (IS_ENABLED(CONFIG_EROFS_FS_ZIP) && sbi->available_compr_algs)
 		seq_printf(seq, ",cache_strategy=%s",
 			  erofs_param_cache_strategy[opt->cache_strategy].name);
 	if (test_opt(opt, DAX_ALWAYS))
-- 
2.43.5