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>
diff --git a/arch/x86/kernel/io_apic.c b/arch/x86/kernel/io_apic.c
index 908c1d0..1cbf7c8 100644
--- a/arch/x86/kernel/io_apic.c
+++ b/arch/x86/kernel/io_apic.c
@@ -1326,13 +1326,10 @@
}
if (unlikely(current_vector == vector))
continue;
-#ifdef CONFIG_X86_64
- if (vector == IA32_SYSCALL_VECTOR)
+
+ if (test_bit(vector, used_vectors))
goto next;
-#else
- if (vector == SYSCALL_VECTOR)
- goto next;
-#endif
+
for_each_cpu_and(new_cpu, tmp_mask, cpu_online_mask)
if (per_cpu(vector_irq, new_cpu)[vector] != -1)
goto next;