Re: [PATCH v15 2/9] erofs: decouple `struct erofs_anon_fs_type`

[Christoph Hellwig]

On Mon, Jan 19, 2026 at 09:44:59AM +0800, Gao Xiang wrote:
> But I'm not sure if there is a case as `#if defined() || defined()`,
> it seems it cannot be simply replaced with `#ifdef`.

They can't.  If you have multiple statements compined using operators
you need to use #if and defined().