[PATCH] KVM: nVMX: Replace a BUG_ON(1) with BUG() to squash clang warning

[Sean Christopherson <sean.j.christopherson@intel.com>]

Use BUG() in the impossible-to-hit default case when switching on the
scope of INVEPT to squash a warning with clang 11 due to clang treating
the BUG_ON() as conditional.

  >> arch/x86/kvm/vmx/nested.c:5246:3: warning: variable 'roots_to_free'
     is used uninitialized whenever 'if' condition is false
     [-Wsometimes-uninitialized]
                   BUG_ON(1);

Reported-by: kbuild test robot <lkp@intel.com>
Fixes: ce8fe7b77bd8 ("KVM: nVMX: Free only the affected contexts when emulating INVEPT")
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
---
 arch/x86/kvm/vmx/nested.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c
index 2c36f3f53108..669445136144 100644
--- a/arch/x86/kvm/vmx/nested.c
+++ b/arch/x86/kvm/vmx/nested.c
@@ -5249,7 +5249,7 @@ static int handle_invept(struct kvm_vcpu *vcpu)
 		roots_to_free = KVM_MMU_ROOTS_ALL;
 		break;
 	default:
-		BUG_ON(1);
+		BUG();
 		break;
 	}
 
-- 
2.26.0