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SubjectRe: EFAULT from file read.
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,

David
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