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📁 linux 0.11中文版有注释

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<a href='../S/12.html#L347'>PIPE_HEAD</a>         347 fs/inode.c       PIPE_HEAD (*inode) = PIPE_TAIL (*inode) = 0;	// 复位管道头尾指针。
<a href='../S/16.html#L82'>PIPE_HEAD</a>          82 fs/pipe.c            chars = PAGE_SIZE - PIPE_HEAD (*inode);
<a href='../S/16.html#L91'>PIPE_HEAD</a>          91 fs/pipe.c            size = PIPE_HEAD (*inode);
<a href='../S/16.html#L92'>PIPE_HEAD</a>          92 fs/pipe.c            PIPE_HEAD (*inode) += chars;
<a href='../S/16.html#L93'>PIPE_HEAD</a>          93 fs/pipe.c            PIPE_HEAD (*inode) &amp;= (PAGE_SIZE - 1);
<a href='../S/31.html#L79'>PIPE_HEAD</a>          79 include/linux/fs.h #define PIPE_SIZE(inode) ((PIPE_HEAD(inode)-PIPE_TAIL(inode))&amp;(PAGE_SIZE-1))
<a href='../S/31.html#L80'>PIPE_HEAD</a>          80 include/linux/fs.h #define PIPE_EMPTY(inode) (PIPE_HEAD(inode)==PIPE_TAIL(inode))
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