virt: acrn: Correct type casting of argument of copy_from_user()

hsm.c:336:50: warning: incorrect type in argument 2 (different address spaces)
hsm.c:336:50:    expected void const [noderef] __user *from
hsm.c:336:50:    got void *

This patch fixes above sparse warning.

Fixes: 3d679d5aec64 ("virt: acrn: Introduce interfaces to query C-states and P-states allowed by hypervisor")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Shuo Liu <shuo.a.liu@intel.com>
Link: https://lore.kernel.org/r/20210310153708.17451-1-shuo.a.liu@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/virt/acrn/hsm.c b/drivers/virt/acrn/hsm.c
index 6996ea6..130e12b 100644 (file)
--- a/drivers/virt/acrn/hsm.c
+++ b/drivers/virt/acrn/hsm.c
@@ -333,7 +333,7 @@ static long acrn_dev_ioctl(struct file *filp, unsigned int cmd,
                acrn_ioreq_request_clear(vm);
                break;
        case ACRN_IOCTL_PM_GET_CPU_STATE:
-               if (copy_from_user(&cstate_cmd, (void *)ioctl_param,
+               if (copy_from_user(&cstate_cmd, (void __user *)ioctl_param,
                                   sizeof(cstate_cmd)))
                        return -EFAULT;