Re: net: r8169: a question of memory barrier in the r8169 driver

On Fri, Jan 19, 2018 at 02:11:18AM +0100, Francois Romieu wrote:

Peter Zijlstra [off-list ref] :
[...]

quoted

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.