x86: restrict PIT clocksource usage

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PIT clocksource is registered unconditionally even when HPET is enabled
or when PIT is replaced by the local APIC timer. In both cases PIT can
not be used as it is stopped and the readout would be stale.

Prevent registering PIT in those cases.

patch depends on:

  x86: offer is_hpet_enabled() on !CONFIG_HPET_TIMER too

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

...

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Thomas Gleixner 2008-01-30 13:30:02 +01:00 • committed by Ingo Molnar

parent df619e6baf

commit 316da3b3fc

1 changed files with 9 additions and 1 deletions

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arch/x86/kernel/i8253.c

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