lkml.org 
[lkml]   [2001]   [Sep]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    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
    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2005-03-22 13:03    [W:4.307 / U:0.008 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site