[PATCH v3 23/25] KVM: TDX: Use guard() to acquire kvm->lock in tdx_vm_ioctl()

[Edgecombe, Rick P]

On Thu, 2025-10-16 at 17:32 -0700, Sean Christopherson wrote:
> Use guard() in tdx_vm_ioctl() to tidy up the code a small amount, but more
> importantly to minimize the diff of a future change, which will use
> guard-like semantics to acquire and release multiple locks.
> 
> No functional change intended.

There is a tiny functional change. In the default case it no longer re-copies
the struct back to userspace.

> 
> Signed-off-by: Sean Christopherson <seanjc at google.com>
> ---

Reviewed-by: Rick Edgecombe <rick.p.edgecombe at intel.com>