PVOP_TEST_NULL    496 arch/x86/include/asm/paravirt_types.h #define PVOP_TEST_NULL(op)	BUG_ON(pv_ops.op == NULL)
PVOP_TEST_NULL    498 arch/x86/include/asm/paravirt_types.h #define PVOP_TEST_NULL(op)	((void)pv_ops.op)