On Fri, Jan 19, 2018 at 02:11:18AM +0100, Francois Romieu wrote: > Peter Zijlstra <pet...@infradead.org> : > [...] > > There is only 1 variable afaict. Memory barriers need at least 2 in > > order to be able to do _anything_. > > I don't get your point: why don't {cur_tx, dirty_tx} qualify as said > two variables ?
There wasn't any cur_tx in the code you provided.