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>
diff --git a/arch/x86/kernel/apic_64.c b/arch/x86/kernel/apic_64.c
index a73b443a..b08c08e 100644
--- a/arch/x86/kernel/apic_64.c
+++ b/arch/x86/kernel/apic_64.c
@@ -55,6 +55,8 @@
.flags = IORESOURCE_MEM | IORESOURCE_BUSY,
};
+static unsigned int calibration_result;
+
/*
* cpu_mask that denotes the CPUs that needs timer interrupt coming in as
* IPIs in place of local APIC timers
@@ -821,7 +823,7 @@
#define TICK_COUNT 100000000
-static int __init calibrate_APIC_clock(void)
+static void __init calibrate_APIC_clock(void)
{
unsigned apic, apic_start;
unsigned long tsc, tsc_start;
@@ -855,17 +857,14 @@
result = (apic_start - apic) * 1000L * tsc_khz /
(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",
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)
{
if (disable_apic_timer) {
@@ -878,7 +877,7 @@
local_irq_disable();
- calibration_result = calibrate_APIC_clock();
+ calibrate_APIC_clock();
/*
* Now set up the timer for real.
*/
@@ -985,8 +984,6 @@
apic_write(reg, v);
}
-#undef APIC_DIVISOR
-
/*
* Local timer interrupt handler. It does both profiling and
* process statistics/rescheduling.