> So volatile by itself gives nothing. In kernel you have to use barrier() Not True. volatille is very usefull. 'jiffies' are volatile, and many status registers variables for devices are volatile. Volatile means 'don't trust the cached value, reread it.' Any variable that changes very fast or very often should be volatile. The barrier() functions are used for syncing caches on SMP boxes, I believe they do nothing on UP boxes, not positive on this though. Tom -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
