SRCU_SIZING_CONTEND
convert_to_big = SRCU_SIZING_NONE | SRCU_SIZING_CONTEND;
#define SRCU_SIZING_IS(x) ((convert_to_big & ~SRCU_SIZING_CONTEND) == x)
#define SRCU_SIZING_IS_CONTEND() (convert_to_big & SRCU_SIZING_CONTEND)