Messages in this thread |  | | Date | Wed, 19 Sep 2001 18:24:47 +0800 | From | David Chow <> | Subject | Re: EFAULT from file read. |
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Alexander Viro ¼g¹D¡G > > On Tue, 18 Sep 2001, Richard B. Johnson wrote: > > > File I/O requires a process context. Your file descriptor means > > nothing unless associated with the process that opened the file. > > It fscking doesn't. He had clearly said that he calls file->f_op->read(), > which has nothing whatsofuckingever to descriptors. Sod off and don't > return until you learn to read. > > As for the original question - grep fro set_fs and you'll see what to > do (basically, set_fs(KERNEL_DS) before the call of ->read() and restore > afterwards).
Problem solved by calling dummy=set_fs(KERNEL_DS) . But remember to call set_fs(dummy) to restore after the read.
regards,
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