On Mon, May 02, 2016 at 10:57:38AM -0700, Paul E. McKenney wrote:
> -#define rcu_assign_pointer(p, v) smp_store_release(&p, RCU_INITIALIZER(v))
> +#define rcu_assign_pointer(p, v) \
> +({ \
> + uintptr_t _r_a_p__v = (uintptr_t)(v); \
> + \
> + if (__builtin_constant_p(v) && (_r_a_p__v) == (uintptr_t)NULL) \
> + WRITE_ONCE((p), (typeof(p))(_r_a_p__v)); \
> + else \
> + smp_store_release(&p, RCU_INITIALIZER((typeof(p))_r_a_p__v)); \
> + _r_a_p__v; \
> +})
Can't we turn it into an inline (would need different calling
conventions for p, though).
