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/DragonOS-0.1.8/kernel/src/io/
Ddevice.rs119 let buf_begin = range.origin_begin() - offset; // 本次读操作的起始位置/已经读了这么多字节 in read_at()
155 let buf_begin = range.origin_begin() - offset; // 本次读操作的起始位置/已经读了这么多字节 in write_at()
314 pub fn origin_begin(&self) -> usize { in origin_begin() method