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    SubjectRe: s390(64) per_cpu in modules (ipv6)
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    On Wed, 2004-06-30 at 16:35, Pete Zaitcev wrote:
    > Hi, Martin,
    >
    > I tried to build ipv6 as a module in 2.6.7, and it bombs, producing a
    > module which wants per_cpu____icmpv6_socket (obviously, undefined).
    >
    > The problem appears to be caused by this:
    >
    > #define __get_got_cpu_var(var,offset) \
    > (*({ unsigned long *__ptr; \
    > asm ( "larl %0,per_cpu__"#var"@GOTENT" : "=a" (__ptr) ); \
    > ((typeof(&per_cpu__##var))((*__ptr) + offset)); \
    > }))


    Heh, I ran into the same problem trying to do this trick for PPC64. You
    really need to use __thread and make GCC do the work, AFAICT.

    The worse problem is that a (static) per-cpu var declared *inside* a
    function gets renamed by gcc; IIRC some generic code used to do this.

    Rusty.
    --
    Anyone who quotes me in their signature is an idiot -- Rusty Russell

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