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    SubjectRe: Being more anal about iospace accesses..
    Linus Torvalds writes:
    > On Wed, 15 Sep 2004, JЖrn Engel wrote:
    > >
    > > C now supports pointer arithmetic with void*?
    > C doesn't. gcc does. It's a documented extension, and it acts like if it
    > was done on a byte.
    > See gcc's user guide "Extension to the C Language Family".
    > It's a singularly good feature.

    Unfortunately it breaks even better identity

    foo *p;

    p + nr == (foo *)((char *)p + nr * sizeof *p)

    unless one thinks that is --together with gcc-- that nothing occupies
    exactly one byte.

    > Linus


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