[patch 2/2] x86/vdso: Prevent empty switch case warning

[Thomas Gleixner <tglx@kernel.org>]

Sparse complains rightfully when CONFIG_PARAVIRT_CLOCK and
CONFIG_HYPERV_TIMER are both not set:

  arch/x86/entry/vdso/vma.c:94:9: warning: switch with no cases

Add a default case to fix that.

Signed-off-by: Thomas Gleixner <tglx@kernel.org>
---
 arch/x86/entry/vdso/vma.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/arch/x86/entry/vdso/vma.c
+++ b/arch/x86/entry/vdso/vma.c
@@ -114,6 +114,8 @@ static vm_fault_t vvar_vclock_fault(cons
 		break;
 	}
 #endif /* CONFIG_HYPERV_TIMER */
+	default:
+		break;
 	}
 
 	return VM_FAULT_SIGBUS;