diff options
Diffstat (limited to 'drivers/lguest/interrupts_and_traps.c')
| -rw-r--r-- | drivers/lguest/interrupts_and_traps.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/drivers/lguest/interrupts_and_traps.c b/drivers/lguest/interrupts_and_traps.c index a1039068f95..415fab0125a 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; } |