Bug 8101

Summary: oops with io_apic on non mulitprocessor machines (irq_desc[].affinity not found)
Product: ACPI Reporter: Michael Musenbrock (redeamer)
Component: Config-InterruptsAssignee: Randy Dunlap (randy.dunlap)
Status: CLOSED PATCH_ALREADY_AVAILABLE    
Severity: normal CC: randy.dunlap
Priority: P2    
Hardware: i386   
OS: Linux   
Kernel Version: 2.6.21-rc2 Subsystem:
Regression: --- Bisected commit-id:

Description Michael Musenbrock 2007-02-28 12:39:56 UTC 
Most recent kernel where this bug did *NOT* occur: 2.6.20-rc1
Distribution: Debian SID
Hardware Environment: x86 P4M single processor
Software Environment: i386
Problem Description:
io_apic does not compile, because irq_desc[].affinity is not available, because
it is ifndef'd if you are going to compile with an non smp machine.

Steps to reproduce:
Compile with apic and io_apic support on a non smp machine

Steps to fix:
Change include/linux/irq.h in struct irq_desc

from
#ifdef CONFIG_SMP
	cpumask_t		affinity;
	unsigned int		cpu;
#endif

to
	cpumask_t		affinity;
#ifdef CONFIG_SMP
	unsigned int		cpu;
#endif