[PATCH] skip sync_arb_IDs on P4/Xeon
The "Synchronize Arbitration IDs with APIC IDs" IPI does not make sense on Pentium 4 and Xeon because they don't have an APIC bus where arbitration IDs would be needed. The Intel Developers manual (Vol. 3, Ch. 8.6.1) says this IPI is unsupported on P4/Xeon. Using it may, according to Intel, lead to unpredictable results. Signed-off-by: Martin Wilck <martin.wilck@fujitsu-siemens.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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