[Xen-merge] General xen question on send_IPI_self

["Martin J. Bligh" <mbligh@xxxxxxxxxx>]

This looks dangerous to me, instintively, though I don't know what
you're doing in this space, or why. How can you get away with a no-op
for send_IPI_self?

#ifndef CONFIG_SMP
void fastcall send_IPI_self(int vector)
{
#ifndef CONFIG_XEN
        unsigned int cfg;

        /*
         * Wait for idle.
         */
        apic_wait_icr_idle();
        cfg = APIC_DM_FIXED | APIC_DEST_SELF | vector | APIC_DEST_LOGICAL;
        /*
         * Send the IPI. The write to APIC_ICR fires this off.
         */
        apic_write_around(APIC_ICR, cfg);
#endif
}
#endif /* !CONFIG_SMP */


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