On 2/11/2021 01:52, Randy Dunlap wrote: > On 2/10/21 3:42 AM, Stephen Rothwell wrote: >> Hi all, >> >> Changes since 20210209: >> > > ../drivers/virt/acrn/hsm.c: In function ‘remove_cpu_store’: > ../drivers/virt/acrn/hsm.c:389:3: error: implicit declaration of function ‘remove_cpu’; did you mean ‘register_cpu’? [-Werror=implicit-function-declaration] > remove_cpu(cpu); > > ../drivers/virt/acrn/hsm.c:402:2: error: implicit declaration of function ‘add_cpu’; did you mean ‘task_cpu’? [-Werror=implicit-function-declaration] > add_cpu(cpu); > > > Full randconfig file is attached. > Thanks. The vCPU removing depends on CONFIG_HOTPLUG_CPU. Below change could fix. --- diff --git a/drivers/virt/acrn/hsm.c b/drivers/virt/acrn/hsm.c index 1f6b7c54a1a4..e340788aacdf 100644 --- a/drivers/virt/acrn/hsm.c +++ b/drivers/virt/acrn/hsm.c @@ -372,6 +372,7 @@ static int acrn_dev_release(struct inode *inode, struct file *filp) return 0; } +#ifdef CONFIG_HOTPLUG_CPU static ssize_t remove_cpu_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) @@ -403,9 +404,12 @@ static ssize_t remove_cpu_store(struct device *dev, return ret; } static DEVICE_ATTR_WO(remove_cpu); +#endif static struct attribute *acrn_attrs[] = { +#ifdef CONFIG_HOTPLUG_CPU &dev_attr_remove_cpu.attr, +#endif NULL };