diff options
| -rw-r--r-- | arch/x86/kernel/cpu/mshyperv.c | 9 | ||||
| -rw-r--r-- | arch/x86/kernel/idt.c | 6 | ||||
| -rw-r--r-- | drivers/xen/events/events_base.c | 6 |
3 files changed, 7 insertions, 14 deletions
diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c index 70e717fccdd6..9fc32651c911 100644 --- a/arch/x86/kernel/cpu/mshyperv.c +++ b/arch/x86/kernel/cpu/mshyperv.c @@ -59,13 +59,8 @@ void hyperv_vector_handler(struct pt_regs *regs) void hv_setup_vmbus_irq(void (*handler)(void)) { vmbus_handler = handler; - /* - * Setup the IDT for hypervisor callback. Prevent reallocation - * at module reload. - */ - if (!test_bit(HYPERVISOR_CALLBACK_VECTOR, used_vectors)) - alloc_intr_gate(HYPERVISOR_CALLBACK_VECTOR, - hyperv_callback_vector); + /* Setup the IDT for hypervisor callback */ + alloc_intr_gate(HYPERVISOR_CALLBACK_VECTOR, hyperv_callback_vector); } void hv_remove_vmbus_irq(void) diff --git a/arch/x86/kernel/idt.c b/arch/x86/kernel/idt.c index 8e9318d2b56d..b609eac3d73c 100644 --- a/arch/x86/kernel/idt.c +++ b/arch/x86/kernel/idt.c @@ -354,7 +354,7 @@ void set_intr_gate(unsigned int n, const void *addr) void alloc_intr_gate(unsigned int n, const void *addr) { - BUG_ON(test_bit(n, used_vectors) || n < FIRST_SYSTEM_VECTOR); - set_bit(n, used_vectors); - set_intr_gate(n, addr); + BUG_ON(n < FIRST_SYSTEM_VECTOR); + if (!test_and_set_bit(n, used_vectors)) + set_intr_gate(n, addr); } diff --git a/drivers/xen/events/events_base.c b/drivers/xen/events/events_base.c index 2d43118077e4..1ab4bd11f5f3 100644 --- a/drivers/xen/events/events_base.c +++ b/drivers/xen/events/events_base.c @@ -1653,10 +1653,8 @@ void xen_callback_vector(void) return; } pr_info("Xen HVM callback vector for event delivery is enabled\n"); - /* in the restore case the vector has already been allocated */ - if (!test_bit(HYPERVISOR_CALLBACK_VECTOR, used_vectors)) - alloc_intr_gate(HYPERVISOR_CALLBACK_VECTOR, - xen_hvm_callback_vector); + alloc_intr_gate(HYPERVISOR_CALLBACK_VECTOR, + xen_hvm_callback_vector); } } #else |