5a90cf205c
Change mark_tsc_unstable() so it takes a string argument, which holds the reason the TSC was marked unstable. This is then displayed the first time mark_tsc_unstable is called. This should help us better debug why the TSC was marked unstable on certain systems and allow us to make sure we're not being overly paranoid when throwing out this troublesome clocksource. Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Andi Kleen <ak@suse.de>
33 lines
836 B
C
33 lines
836 B
C
/*
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* linux/include/asm-x86_64/timex.h
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*
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* x86-64 architecture timex specifications
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*/
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#ifndef _ASMx8664_TIMEX_H
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#define _ASMx8664_TIMEX_H
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#include <asm/8253pit.h>
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#include <asm/msr.h>
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#include <asm/vsyscall.h>
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#include <asm/hpet.h>
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#include <asm/system.h>
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#include <asm/processor.h>
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#include <asm/tsc.h>
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#include <linux/compiler.h>
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#define CLOCK_TICK_RATE PIT_TICK_RATE /* Underlying HZ */
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extern int read_current_timer(unsigned long *timer_value);
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#define ARCH_HAS_READ_CURRENT_TIMER 1
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#define USEC_PER_TICK (USEC_PER_SEC / HZ)
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#define NSEC_PER_TICK (NSEC_PER_SEC / HZ)
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#define FSEC_PER_TICK (FSEC_PER_SEC / HZ)
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#define NS_SCALE 10 /* 2^10, carefully chosen */
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#define US_SCALE 32 /* 2^32, arbitralrily chosen */
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extern void mark_tsc_unstable(char *msg);
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extern void set_cyc2ns_scale(unsigned long khz);
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#endif
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