On Tue, Jul 06, 2021 at 12:18:18PM +0800, Huacai Chen wrote: > +/* > + * Loongson-3's SFB (Store-Fill-Buffer) may buffer writes indefinitely when a > + * tight read loop is executed, because reads take priority over writes & the > + * hardware (incorrectly) doesn't ensure that writes will eventually occur. > + * > + * Since spin loops of any kind should have a cpu_relax() in them, force an SFB > + * flush from cpu_relax() such that any pending writes will become visible as > + * expected. > + */ > +#define cpu_relax() smp_mb() Guys! You've not fixed that utter trainwreck ?!? You've taped out a whole new architecture and you're keeping this?
