feat: 添加gendisk抽象 (#903)

* feat: 添加gendisk抽象.

* 支持使用virtio磁盘作为根文件系统

* Update initial_kthread.rs to resolve conflict.

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Co-authored-by: Donkey Kane <109840258+xiaolin2004@users.no

feat: 添加gendisk抽象 (#903)

* feat: 添加gendisk抽象.

* 支持使用virtio磁盘作为根文件系统

* Update initial_kthread.rs to resolve conflict.

---------

Co-authored-by: Donkey Kane <109840258+xiaolin2004@users.noreply.github.com>

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