i386: introduce "used_vectors" bitmap which can be used to reserve vectors.
This simplifies the io_apic.c __assign_irq_vector() logic and removes
the explicit SYSCALL_VECTOR check, and also allows for vectors to be
reserved by other mechanisms (ie. lguest).
[ tglx: arch/x86 adaptation ]
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/include/asm-x86/irq_32.h b/include/asm-x86/irq_32.h
index 36f3106..aca9c96 100644
--- a/include/asm-x86/irq_32.h
+++ b/include/asm-x86/irq_32.h
@@ -45,4 +45,7 @@
void init_IRQ(void);
void __init native_init_IRQ(void);
+/* Interrupt vector management */
+extern DECLARE_BITMAP(used_vectors, NR_VECTORS);
+
#endif /* _ASM_IRQ_H */