On Thu, Feb 13, 2025 at 04:02:46PM +0800, Ming Lei wrote: > The problem[1] is that this kind of mmc card fails to be recognized as > block disk. Block layer io split code can handle this case actually. When we still had bio_add_pc_page it would break the assumption that you could always add a full page. With that gone and everything going through the split machinery we might be fine now, but backporting it to 6.13 and earlier will cause breakage.