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    SubjectRe: Real-Time Preemption, -RT-2.6.10-rc2-mm3-V0.7.31-7
    Ingo Molnar wrote:
    >
    >
    > fixed this in -V0.7.31-14.
    >
    > Ingo
    > This mail arrived via mail.mrv.com
    >
    >

    Compiling -V0.7.31-15 without CONFIG_LATENCY_TRACE results in:
    ...
    CC kernel/latency.o
    kernel/latency.c: In function `check_critical_timing':
    kernel/latency.c:765: warning: implicit declaration of function `__trace'
    ...
    LD .tmp_vmlinux1
    kernel/built-in.o(.text+0x1e407): In function `check_critical_timing':
    : undefined reference to `__trace'
    make: *** [.tmp_vmlinux1] Error 1

    Seems to be fixed by the patch below:

    --- kernel/latency.c.orig 2004-12-01 10:21:45.000000000 +0200
    +++ kernel/latency.c 2004-12-01 10:11:37.000000000 +0200
    @@ -762,7 +762,9 @@
    tr->critical_sequence = max_sequence;
    tr->preempt_timestamp = cycles();
    tr->early_warning = 0;
    +#ifdef CONFIG_LATENCY_TRACE
    __trace(CALLER_ADDR0, parent_eip);
    +#endif
    }

    void notrace touch_critical_timing(void)
    --
    Eran Mann
    -
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