Gitweb: http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=500ff08b76878a45391fffc7a4c972883503050e Commit: 500ff08b76878a45391fffc7a4c972883503050e Parent: 801740971af7c6256b7ad2472706d43ed008fd3d Author: Thomas Gleixner <[EMAIL PROTECTED]> AuthorDate: Fri Oct 12 23:04:06 2007 +0200 Committer: Thomas Gleixner <[EMAIL PROTECTED]> CommitDate: Fri Oct 12 23:04:06 2007 +0200
x86_64: remove pit synchronization The APIC timer setup code synchronizes the local APIC timer to the PIT/HPET. This is pointless as the PIT and the local APIC timer frequency are not correlated and the APIC timer calibration can never be accurate enough to avoid that the local APIC timer and the PIT/HPET drift apart. Simply remove it. Signed-off-by: Thomas Gleixner <[EMAIL PROTECTED]> Signed-off-by: Chris Wright <[EMAIL PROTECTED]> Signed-off-by: Ingo Molnar <[EMAIL PROTECTED]> Signed-off-by: Arjan van de Ven <[EMAIL PROTECTED]> --- arch/x86/kernel/apic_64.c | 18 ------------------ 1 files changed, 0 insertions(+), 18 deletions(-) diff --git a/arch/x86/kernel/apic_64.c b/arch/x86/kernel/apic_64.c index ce2f801..a73b443 100644 --- a/arch/x86/kernel/apic_64.c +++ b/arch/x86/kernel/apic_64.c @@ -790,24 +790,6 @@ static void setup_APIC_timer(unsigned int clocks) local_irq_save(flags); - /* wait for irq slice */ - if (hpet_address && hpet_use_timer) { - u32 trigger = hpet_readl(HPET_T0_CMP); - while (hpet_readl(HPET_T0_CMP) == trigger) - /* do nothing */ ; - } else { - int c1, c2; - outb_p(0x00, 0x43); - c2 = inb_p(0x40); - c2 |= inb_p(0x40) << 8; - do { - c1 = c2; - outb_p(0x00, 0x43); - c2 = inb_p(0x40); - c2 |= inb_p(0x40) << 8; - } while (c2 - c1 < 300); - } - irqen = ! cpu_isset(smp_processor_id(), timer_interrupt_broadcast_ipi_mask); __setup_APIC_LVTT(clocks, 0, irqen); - To unsubscribe from this list: send the line "unsubscribe git-commits-head" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html