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    SubjectRe: [PATCH] Introduce compat_u64 and compat_s64 types
    Date
    On Friday 15 June 2007 11:31:37 Arnd Bergmann wrote:
    > One common problem with 32 bit system call and ioctl emulation
    > is the different alignment rules between i386 and 64 bit machines.
    > A number of drivers work around this by marking the compat
    > structures as 'attribute((packed))', which is not the right
    > solution because it breaks all the non-x86 architectures that
    > want to use the same compat code.

    Why does it break them? It should just make them a little slower.

    The network code requires unaligned accesses to work
    anyways so if your architecture doesn't support them it is already
    remotely crashable.

    -Andi

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