On 04/19/2010 01:39 PM, Peter Zijlstra wrote:
On Fri, 2010-04-16 at 13:36 -0700, Jeremy Fitzhardinge wrote:
+ do {
+ last = last_value;
Does this need a barrier() to prevent the compiler from re-reading
last_value for the subsequent lines? Otherwise "(ret< last)" and
"return last" could execute with different values for "last".
ACCESS_ONCE() is your friend.
I think it's implied with atomic64_read().
--
error compiling committee.c: too many arguments to function
--
To unsubscribe from this list: send the line "unsubscribe kvm" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
