Re: [PATCH v9 01/12] asm-generic: barrier: Add smp_cond_load_relaxed_timeout()

[Randy Dunlap]

> +/**
> + * smp_cond_load_relaxed_timeout() - (Spin) wait for cond with no ordering
> + * guarantees until a timeout expires.
> + * @ptr: pointer to the variable to wait on.
> + * @cond: boolean expression to wait for.

s/cond/cond_expr/

> + * @time_expr_ns: expression that evaluates to monotonic time (in ns) or,
> + *  on failure, returns a negative value.
> + * @timeout_ns: timeout value in ns
> + * Both of the above are assumed to be compatible with s64; the signed
> + * value is used to handle the failure case in @time_expr_ns.
> + *
> + * Equivalent to using READ_ONCE() on the condition variable.
> + *
> + * Callers that expect to wait for prolonged durations might want to
> + * take into account the availability of ARCH_HAS_CPU_RELAX.
> + */
> +#ifndef smp_cond_load_relaxed_timeout
> +#define smp_cond_load_relaxed_timeout(ptr, cond_expr,			\
> +				      time_expr_ns, timeout_ns)		\
> +({									\


-- 
~Randy