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kvm: vfio: silence GCC warning

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Building vfio.o triggers a GCC warning (when building for 32 bits x86):
    arch/x86/kvm/../../../virt/kvm/vfio.c: In function 'kvm_vfio_set_group':
    arch/x86/kvm/../../../virt/kvm/vfio.c:104:22: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
      void __user *argp = (void __user *)arg;
                          ^

Silence this warning by casting arg to unsigned long.

argp's current type, "void __user *", is always casted to "int32_t
__user *". So its type might as well be changed to "int32_t __user *".

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paul Bolle
2014-01-10 01:28:46 +01:00
committed by Paolo Bonzini
parent 26a865f4aa
commit e81d1ad327
1 changed files with 3 additions and 3 deletions
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virt/kvm/vfio.c
+3 -3
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@@ -101,14 +101,14 @@ static int kvm_vfio_set_group(struct kvm_device *dev, long attr, u64 arg)
struct kvm_vfio *kv = dev->private;
struct vfio_group *vfio_group;
struct kvm_vfio_group *kvg;
void __user *argp = (void __user *)arg;
int32_t __user *argp = (int32_t __user *)(unsigned long)arg;
struct fd f;
int32_t fd;
int ret;
switch (attr) {
case KVM_DEV_VFIO_GROUP_ADD:
if (get_user(fd, (int32_t __user *)argp))
if (get_user(fd, argp))
return -EFAULT;
f = fdget(fd);
@@ -148,7 +148,7 @@ static int kvm_vfio_set_group(struct kvm_device *dev, long attr, u64 arg)
return 0;
case KVM_DEV_VFIO_GROUP_DEL:
if (get_user(fd, (int32_t __user *)argp))
if (get_user(fd, argp))
return -EFAULT;
f = fdget(fd);