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    SubjectRe: Address translation
    Hi!

    > otherwise valid) I think the access macros are unnecessary. I would be
    > *very* glad if someone could confirm this, or shoot me down. :)
    >
    > For instance, a kernel module I am writing allocates some memory in
    > the current process's address space as follows:
    >
    > down(&mm->mmap_sem);
    > s->table = (void **)get_unmapped_area(0, SIZEOF_TABLE);
    > if ( s->table != NULL )
    > do_brk((unsigned long)s->table, SIZEOF_TABLE);
    > up(&mm->mmap_sem);
    >
    > Some questions:
    > (1) In a "top half" thread, can I now access this memory without the
    > access macros (since I know the address range is valid)?
    > (2) Can I also access this memory from an interrupt/exception
    > context, or must I lock it? (ie. can faults be handled from such
    > a context)

    poof! I've shooted you.

    You may definitely access such memory from interrupt.

    --
    Philips Velo 1: 1"x4"x8", 300gram, 60, 12MB, 40bogomips, linux, mutt,
    details at http://atrey.karlin.mff.cuni.cz/~pavel/velo/index.html.

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