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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_32.c
parenta7883dece6ef82097e6bdf19c1d0a20351e06056 (diff)
downloadlinux-2.6.38-lt-ux500-b77b881f21b29aa7efa668fde69ee3dc0372ae3f.tar.gz
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_32.c')
-rw-r--r--arch/x86/kernel/irqinit_32.c16
1 files changed, 15 insertions, 1 deletions
diff --git a/arch/x86/kernel/irqinit_32.c b/arch/x86/kernel/irqinit_32.c
index 6a92f47c52e..61aa2a1004b 100644
--- a/arch/x86/kernel/irqinit_32.c
+++ b/arch/x86/kernel/irqinit_32.c
@@ -110,6 +110,18 @@ 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;
+}
+
/* Overridden in paravirt.c */
void init_IRQ(void) __attribute__((weak, alias("native_init_IRQ")));
@@ -146,10 +158,12 @@ void __init native_init_IRQ(void)
alloc_intr_gate(CALL_FUNCTION_VECTOR, call_function_interrupt);
/* IPI for single call function */
- set_intr_gate(CALL_FUNCTION_SINGLE_VECTOR, call_function_single_interrupt);
+ alloc_intr_gate(CALL_FUNCTION_SINGLE_VECTOR,
+ call_function_single_interrupt);
/* 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
#ifdef CONFIG_X86_LOCAL_APIC