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x86: fix lguest used_vectors breakage, -v2

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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>
This commit is contained in:
Yinghai Lu
2008-12-19 15:23:44 -08:00
committed by Ingo Molnar
parent a7883dece6
commit b77b881f21
8 changed files with 52 additions and 24 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/lguest/interrupts_and_traps.c
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@@ -222,11 +222,16 @@ bool check_syscall_vector(struct lguest *lg)
int init_interrupts(void)
{
/* If they want some strange system call vector, reserve it now */
if (syscall_vector != SYSCALL_VECTOR
&& test_and_set_bit(syscall_vector, used_vectors)) {
printk("lg: couldn't reserve syscall %u\n", syscall_vector);
return -EBUSY;
if (syscall_vector != SYSCALL_VECTOR) {
if (test_bit(syscall_vector, used_vectors) ||
vector_used_by_percpu_irq(syscall_vector)) {
printk(KERN_ERR "lg: couldn't reserve syscall %u\n",
syscall_vector);
return -EBUSY;
}
set_bit(syscall_vector, used_vectors);
}
return 0;
}