Ingo Oeser <[email protected]> wrote:
>
> Stephen Hemminger wrote:
> > Looks like PIO at unaligned addresses doesn't work on alpha...
>
> Maybe this should be fixed similiar to ioread32_rep in arch/alpha/kernel/io.c?
>
I think so, but Ivan thinks networking is bust:
Ivan Kokshaysky <[email protected]> wrote:
>
> On Fri, Apr 21, 2006 at 04:28:30AM -0700, Andrew Morton wrote:
> > Why is it "silently corrupted"? It's just misaligned, isn't it? Networking
> > does that sometimes.
>
> Because networking does read/write "short" fields in various packet
> header structures. Results are illustrated in a following example:
>
> char foo[] __attribute__((aligned(8))) = "0123456701234567";
>
> int main()
> {
> short *bar = (short *)&foo[7];
> printf("%04x\n", *bar); /* 3037 */
> *bar = 0x4241; /* "AB" */
> printf("%s\n", foo);
> return 0;
> }
> --------
> 0037
> ^^
> 0123456A01234567
> ^
> Misalignment by two bytes for ints and longs is often unavoidable in
> networking and we can cope with it, but there is no excuse of 1-byte
> misalignment.
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