[patch] x86_64: warn if unable to configure apic main timer

[Chuck Ebbert]

When using the APIC main timer option on x86_64, sometimes it
fails to complete its setup.  Warn about this and suggest
the user try 'disable_timer_pin_1' if their system clock runs
too fast. Also, make printing of the exact result of APIC
timer calibration require 'apic=verbose'.

Signed-off-by: Chuck Ebbert <76306.1226@xxxxxxxxxxxxxx>

--- 2.6.16-rc4-64.orig/arch/x86_64/kernel/apic.c
+++ 2.6.16-rc4-64/arch/x86_64/kernel/apic.c
@@ -738,6 +738,12 @@ static void setup_APIC_timer(unsigned in
 		apic_runs_main_timer++;
 	}
 	local_irq_restore(flags);
+
+	if (apic_runs_main_timer == 1) {
+		printk(KERN_WARNING "Could not configure APIC main timer.\n");
+		printk(KERN_WARNING "Try boot option 'disable_timer_pin_1'"
+				    " if your system clock runs too fast.\n");
+	}
 }
 
 /*
@@ -786,7 +792,7 @@ static int __init calibrate_APIC_clock(v
 		result = (apic_start - apic) * 1000L * cpu_khz /
 					(tsc - tsc_start);
 	}
-	printk("result %d\n", result);
+	apic_printk(APIC_VERBOSE,"APIC timer result %d\n", result);
 
 
 	printk(KERN_INFO "Detected %d.%03d MHz APIC timer.\n",
-- 
Chuck
"Equations are the Devil's sentences."  --Stephen Colbert
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