On Thu, 6 Jan 2000, Richard B. Johnson wrote:
>Well it __is__ cached into registers on this compiler (2.7.2.3)!
When I said cached into registers I meant cached this way:
read into eax
inc eax
wait 1 year while doing other stuff
write eax into memory before return
And the above would be fine as well in the do_timer case.
> movl foo,%eax ! Get it
> leal 1(%eax),%edx ! bump it by one
> movl %edx,foo ! write it back
The above is perfect for a volatile variable IMHO. Also incl (without lock
on the bus) is not atomic in SMP.
Andrea
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