[kvm-devel] [PATCH/trivial] kvm: remove long -> void *user -> long cast

[Christian B. <bor...@de...>]

Avi,

kvm_dev_ioctl casts the arg value to void __user *, just to recast it
again to long. This seems unnecessary.
According to objdump the binary code on x86 is unchanged by this patch.

Signed-off-by: Christian Borntraeger <bor...@de...>
---
 virt/kvm/kvm_main.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

Index: kvm/virt/kvm/kvm_main.c
===================================================================
--- kvm.orig/virt/kvm/kvm_main.c
+++ kvm/virt/kvm/kvm_main.c
@@ -1188,7 +1188,6 @@ static int kvm_dev_ioctl_create_vm(void)
 static long kvm_dev_ioctl(struct file *filp,
 			  unsigned int ioctl, unsigned long arg)
 {
-	void __user *argp = (void __user *)arg;
 	long r = -EINVAL;
 
 	switch (ioctl) {
@@ -1205,7 +1204,7 @@ static long kvm_dev_ioctl(struct file *f
 		r = kvm_dev_ioctl_create_vm();
 		break;
 	case KVM_CHECK_EXTENSION:
-		r = kvm_dev_ioctl_check_extension((long)argp);
+		r = kvm_dev_ioctl_check_extension(arg);
 		break;
 	case KVM_GET_VCPU_MMAP_SIZE:
 		r = -EINVAL;