summaryrefslogtreecommitdiffstats
path: root/arch/x86/kernel/irqinit_64.c
diff options
context:
space:
mode:
authorYinghai Lu <yinghai@kernel.org>2008-12-19 15:23:44 -0800
committerIngo Molnar <mingo@elte.hu>2008-12-23 22:37:28 +0100
commitb77b881f21b29aa7efa668fde69ee3dc0372ae3f (patch)
treea4039161e9bcab3e9c2fd2e2aa70fee16103857b /arch/x86/kernel/irqinit_64.c
parenta7883dece6ef82097e6bdf19c1d0a20351e06056 (diff)
x86: fix lguest used_vectors breakage, -v2
Impact: fix lguest, clean up 32-bit lguest used used_vectors to record vectors, but that model of allocating vectors changed and got broken, after we changed vector allocation to a per_cpu array. Try enable that for 64bit, and the array is used for all vectors that are not managed by vector_irq per_cpu array. Also kill system_vectors[], that is now a duplication of the used_vectors bitmap. [ merged in cpus4096 due to io_apic.c cpumask changes. ] [ -v2, fix build failure ] Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/irqinit_64.c')
-rw-r--r--arch/x86/kernel/irqinit_64.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/x86/kernel/irqinit_64.c b/arch/x86/kernel/irqinit_64.c
index 40c1e62ec78..1020919efe1 100644
--- a/arch/x86/kernel/irqinit_64.c
+++ b/arch/x86/kernel/irqinit_64.c
@@ -135,6 +135,18 @@ DEFINE_PER_CPU(vector_irq_t, vector_irq) = {
[IRQ15_VECTOR + 1 ... NR_VECTORS - 1] = -1
};
+int vector_used_by_percpu_irq(unsigned int vector)
+{
+ int cpu;
+
+ for_each_online_cpu(cpu) {
+ if (per_cpu(vector_irq, cpu)[vector] != -1)
+ return 1;
+ }
+
+ return 0;
+}
+
void __init init_ISA_irqs(void)
{
int i;
@@ -187,6 +199,7 @@ static void __init smp_intr_init(void)
/* Low priority IPI to cleanup after moving an irq */
set_intr_gate(IRQ_MOVE_CLEANUP_VECTOR, irq_move_cleanup_interrupt);
+ set_bit(IRQ_MOVE_CLEANUP_VECTOR, used_vectors);
#endif
}