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    SubjectRe: spin_lock forgets to clobber memory and other smp fixes [was Re: [patch] waitqueue optimization, 2.4.0-test7]
    On Thu, 7 Sep 2000, Jamie Lokier wrote:

    >int *p;
    >int func()
    >{
    > int x;
    > x = *p;
    > __asm__ __volatile__ ("" : : : "memory");
    > x = *p;
    > return x;
    >}
    >

    Defintely none difference here (-fstrict-aliasing doesn't change anything
    either).

    andrea@inspiron:~ > gcc -v
    Reading specs from /usr/lib/gcc-lib/i486-suse-linux/2.95.2/specs
    gcc version 2.95.2 19991024 (release)

    Andrea

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