Re: Compilers and RCU readers: Once more unto the breach!

[Ramana Radhakrishnan]

On 20/05/15 14:37, David Howells wrote:
> Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx> wrote:
>
> > I was thinking of "y" as a simple variable, but if it is something more
> > complex, then the compiler could do this, right?
> >
> > 	char *x;
> >
> > 	y;
> > 	x = z;
>
> Yeah.  I presume it has to maintain the ordering, though.

The scheduler for e.g. is free to reorder if it can prove there is no 
dependence (or indeed side-effects for y) between insns produced for y 
and `x = z'.

regards
Ramana

> David
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