Re: [PATCH 0/2] jump label: 2.6.38 updates

[Will Newton]

On Mon, Feb 14, 2011 at 5:27 PM, Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote:

>> So all but a few have basically (as you said on IRC)
>> #define atomic_read(v) ACCESS_ONCE(v)
>
> ACCESS_ONCE(v->counter), but yeah :-)

I maintain an out-of-tree architecture where that isn't the case
unfortunately [1]. Not expecting any special favours for being
out-of-tree of course, but just thought I would add that data point.

[1] Our atomic operations go around the cache rather than through it,
so the value of an atomic cannot be read with a normal load
instruction.
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