[PATCH v2] arch/cacheflush: Introduce flush_all_caches()

[Davidlohr Bueso]

On Fri, 19 Aug 2022, Ira Weiny wrote:

>Did you mean "must"?

Yep.

>> + * such as those which caches are in a consistent state. The
>> + * caller can verify the situation early on.
>> + */
>> +#ifndef flush_all_caches
>> +# define flush_all_caches_capable() false
>> +static inline void flush_all_caches(void)
>> +{
>> +	WARN_ON_ONCE("cache invalidation required\n");
>> +}
>
>With the addition of flush_all_caches_capable() will flush_all_caches() ever be
>called?

No, it should not. Hence you get a splat if you call it bogusly.