Re: Why does test_bit() take a volatile addr?

[Michael S. Tsirkin]

On Mon, Sep 16, 2013 at 04:53:44PM +1000, Stephen Rothwell wrote:
> Hi Rusty,
> 
> On Mon, 16 Sep 2013 13:38:35 +0930 Rusty Russell <rusty@xxxxxxxxxxxxxxx> wrote:
> >
> > Predates git, does anyone remember the rationale?
> > 
> > ie:
> >         int test_bit(int nr, const volatile unsigned long *addr)
> 
> Because we sometimes pass volatile pointers to it and gcc will complain
> if you pass a volatile to a non volatile  (I think).

Where are these? I did git grep -W test_bit and looked for volatile,
couldn't find anything.

> -- 
> Cheers,
> Stephen Rothwell                    sfr@xxxxxxxxxxxxxxxx


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