On Thu, Aug 10, 2017 at 06:24:53PM +0200, Peter Zijlstra wrote:
> -ENTRY(xen_irq_enable_direct)
> -     FRAME_BEGIN
> -     /* Unmask events */
> -     movb $0, PER_CPU_VAR(xen_vcpu_info) + XEN_vcpu_info_mask
> -
> -     /*
> -      * Preempt here doesn't matter because that will deal with any
> -      * pending interrupts.  The pending check may end up being run
> -      * on the wrong CPU, but that doesn't hurt.
> -      */
> -
> -     /* Test for pending */
> -     testb $0xff, PER_CPU_VAR(xen_vcpu_info) + XEN_vcpu_info_pending
> -     jz 1f
> -
> -2:   call check_events
> -1:
> -ENDPATCH(xen_irq_enable_direct)
> -     FRAME_END
> -     ret
> -     ENDPROC(xen_irq_enable_direct)
> -     RELOC(xen_irq_enable_direct, 2b+1)

Oh my bad, part of that is still used.

arch/x86/xen/enlighten_pv.c:            pv_irq_ops.irq_enable = 
__PV_IS_CALLEE_SAVE(xen_irq_enable_direct);

It just needs cleanups for the ENDPATCH and such.

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