[RFC][PATCH] fix target_cpus() for summit subarch

[john stultz]

I've been hunting down a bug affecting IBM x440/x445 systems where the
floppy driver would get spurious interrupts and would not initialize
properly. 

After digging James Cleverdon pointed out that target_cpus() is routing
the interrupts to the clustered apic broadcast mask. This was causing
multiple interrupts to show up, breaking the floppy init code. 

This one-liner fix simply routes interrupts to the first cpu to resolve
this issue.

Any comments or feedback would be appreciated.

thanks
-john

===== include/asm-i386/mach-summit/mach_apic.h 1.38 vs edited =====
--- 1.38/include/asm-i386/mach-summit/mach_apic.h	2004-06-24 01:55:52 -07:00
+++ edited/include/asm-i386/mach-summit/mach_apic.h	2004-08-27 16:43:22 -07:00
@@ -19,7 +19,7 @@
 
 static inline cpumask_t target_cpus(void)
 {
-	return CPU_MASK_ALL;
+	return cpumask_of_cpu(0);
 } 
 #define TARGET_CPUS	(target_cpus())
 


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