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charset="utf-8" Mercury and Neptune were Pentium chipsets - no need to work around their errata, even more so that the workaround looks fragile. Also ditch a Pentium-related and stale part of a comment. Signed-off-by: Jan Beulich Acked-by: Andrew Cooper --- a/xen/arch/x86/apic.c +++ b/xen/arch/x86/apic.c @@ -1042,11 +1042,6 @@ static void __init wait_8254_wraparound( do { prev_count =3D curr_count; curr_count =3D get_8254_timer_count(); - - /* workaround for broken Mercury/Neptune */ - if (prev_count >=3D curr_count + 0x100) - curr_count =3D get_8254_timer_count(); - =20 } while (prev_count >=3D curr_count); } =20 @@ -1056,9 +1051,6 @@ static void __init wait_8254_wraparound( * this function twice on the boot CPU, once with a bogus timeout * value, second time for real. The other (noncalibrating) CPUs * call this function only once, with the real, calibrated value. - * - * We do reads before writes even if unnecessary, to get around the - * P5 APIC double write bug. */ =20 #define APIC_DIVISOR 1