likely
#define likely(expr) expect((expr) != 0, 1)
#define likely(expr) expect((expr) != 0, 1)
#define likely(x) _zfs_expect((x) != 0, 1)
#define likely(x) _zfs_expect((x) != 0, 1)
#define likely(a) (a)
#define likely(x) __builtin_expect((x), 1)
#define likely(x) (x)
#define likely(expr) (expr)