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    Subject-rt x86_64 fix for latency tracing
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    Ingo/Steve,

    The included patch fixes a bug that causes a segfault in the init
    thread when latency tracing is enabled on x86_64 kernels. Not sure if
    it's completely correct, but it gets me past my segfault and lets me
    complete booting.

    diff --git a/arch/x86_64/kernel/entry.S b/arch/x86_64/kernel/entry.S
    index 066497a..b124409 100644
    - --- a/arch/x86_64/kernel/entry.S
    +++ b/arch/x86_64/kernel/entry.S
    @@ -1089,7 +1089,7 @@ ENTRY(mcount)

    mov 0x0(%rbp),%rax
    mov 0x8(%rbp),%rdi
    - - mov 0x8(%rax),%rsi
    + mov 0x10(%rax),%rsi

    call __trace

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    -
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