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    SubjectRe: [PATCH RFC WIP] x86/paravirt: add register-saving thunks to reduce caller register pressure
    Zachary Amsden wrote:
    > Enable/Disable have no clobbers at all.
    > Save clobbers only return value, %eax
    > Restore also clobbers nothing.
    >
    > The patching code has gotten quite complex with the 32/64 union; let me
    > apply it first and see before I comment on the patch.
    >

    This gets it to compile.

    diff -r 452b0aa6f629 arch/x86/kernel/vmi_32.c
    --- a/arch/x86/kernel/vmi_32.c Wed Jan 28 14:18:52 2009 -0800
    +++ b/arch/x86/kernel/vmi_32.c Wed Jan 28 15:37:54 2009 -0800
    @@ -670,10 +670,11 @@
    para_fill(pv_mmu_ops.write_cr2, SetCR2);
    para_fill(pv_mmu_ops.write_cr3, SetCR3);
    para_fill(pv_cpu_ops.write_cr4, SetCR4);
    - para_fill(pv_irq_ops.save_fl, GetInterruptMask);
    - para_fill(pv_irq_ops.restore_fl, SetInterruptMask);
    - para_fill(pv_irq_ops.irq_disable, DisableInterrupts);
    - para_fill(pv_irq_ops.irq_enable, EnableInterrupts);
    +
    + para_fill(pv_irq_ops.save_fl.func, GetInterruptMask);
    + para_fill(pv_irq_ops.restore_fl.func, SetInterruptMask);
    + para_fill(pv_irq_ops.irq_disable.func, DisableInterrupts);
    + para_fill(pv_irq_ops.irq_enable.func, EnableInterrupts);

    para_fill(pv_cpu_ops.wbinvd, WBINVD);
    para_fill(pv_cpu_ops.read_tsc, RDTSC);
    J


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