On Wed, 6 Jan 2021 12:18:36 -0800 (PST) Hugh Dickins <hughd@xxxxxxxxxx> wrote:
> On Wed, 6 Jan 2021, Andrea Arcangeli wrote:
> >
> > I'd be surprised if the kernel can boot with BUG_ON() defined as "do
> > {}while(0)" so I guess it doesn't make any difference.
>
> I had been afraid of that too, when CONFIG_BUG is not set:
> but I think it's actually "if (cond) do {} while (0)".
Yes, that is so. The thinking being that in most cases the compiler
will be smart enough to avoid generating any code for `cond' anyway.
