Matthew Wilcox wrote on Thu, Jun 28, 2018: > How about this? > > /* > * This barrier is needed to make sure any change made to req before > - * the other thread wakes up will indeed be seen by the waiting side. > + * the status change is visible to another thread > */ Yes, that sounds better. This code is fairly old and I was wondering if the new WRITE_ONCE and READ_ONCE macros would help but it looks like compile-time barriers only so I do not think they would be enough... Documentation/memory-barriers.txt still suggests something similar in the "SLEEP AND WAKE-UP FUNCTIONS" section so I guess this is fine. Thanks, -- Dominique Martinet | Asmadeus
