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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 /drivers/lguest/interrupts_and_traps.c
parenta7883dece6ef82097e6bdf19c1d0a20351e06056 (diff)
downloadop-kernel-dev-b77b881f21b29aa7efa668fde69ee3dc0372ae3f.zip
op-kernel-dev-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 'drivers/lguest/interrupts_and_traps.c')
-rw-r--r--drivers/lguest/interrupts_and_traps.c13
1 files changed, 9 insertions, 4 deletions
diff --git a/drivers/lguest/interrupts_and_traps.c b/drivers/lguest/interrupts_and_traps.c
index a103906..415fab0 100644
--- a/drivers/lguest/interrupts_and_traps.c
+++ b/drivers/lguest/interrupts_and_traps.c
@@ -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;
}
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