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x86_64: Move apic calibration code around 

Let the calibration code fill in calibration_result directly and
move the variable on top of the file.

Fixup a printk w/o log level while at it.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
This commit is contained in:
Thomas Gleixner 2007-10-12 23:04:06 +02:00 committed by Thomas Gleixner
parent 500ff08b76
commit d03030e917
1 changed files with 6 additions and 9 deletions
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15
arch/x86/kernel/apic_64.c
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@ -55,6 +55,8 @@ static struct resource lapic_resource = {
.flags = IORESOURCE_MEM | IORESOURCE_BUSY, .flags = IORESOURCE_MEM | IORESOURCE_BUSY,
}; };
static unsigned int calibration_result;
/* /*
* cpu_mask that denotes the CPUs that needs timer interrupt coming in as * cpu_mask that denotes the CPUs that needs timer interrupt coming in as
* IPIs in place of local APIC timers * IPIs in place of local APIC timers
@ -821,7 +823,7 @@ static void setup_APIC_timer(unsigned int clocks)
#define TICK_COUNT 100000000 #define TICK_COUNT 100000000
static int __init calibrate_APIC_clock(void) static void __init calibrate_APIC_clock(void)
{ {
unsigned apic, apic_start; unsigned apic, apic_start;
unsigned long tsc, tsc_start; unsigned long tsc, tsc_start;
@ -855,17 +857,14 @@ static int __init calibrate_APIC_clock(void)
result = (apic_start - apic) * 1000L * tsc_khz / result = (apic_start - apic) * 1000L * tsc_khz /
(tsc - tsc_start); (tsc - tsc_start);
} }
printk("result %d\n", result); printk(KERN_DEBUG "APIC timer calibration result %d\n", result);
printk(KERN_INFO "Detected %d.%03d MHz APIC timer.\n", printk(KERN_INFO "Detected %d.%03d MHz APIC timer.\n",
result / 1000 / 1000, result / 1000 % 1000); result / 1000 / 1000, result / 1000 % 1000);
return result * APIC_DIVISOR / HZ; calibration_result = result * APIC_DIVISOR / HZ;
} }
static unsigned int calibration_result;
void __init setup_boot_APIC_clock (void) void __init setup_boot_APIC_clock (void)
{ {
if (disable_apic_timer) { if (disable_apic_timer) {
@ -878,7 +877,7 @@ void __init setup_boot_APIC_clock (void)
local_irq_disable(); local_irq_disable();
calibration_result = calibrate_APIC_clock(); calibrate_APIC_clock();
/* /*
* Now set up the timer for real. * Now set up the timer for real.
*/ */
@ -985,8 +984,6 @@ void setup_APIC_extended_lvt(unsigned char lvt_off, unsigned char vector,
apic_write(reg, v); apic_write(reg, v);
} }
#undef APIC_DIVISOR
/* /*
* Local timer interrupt handler. It does both profiling and * Local timer interrupt handler. It does both profiling and
* process statistics/rescheduling. * process statistics/rescheduling.