Re: [PATCH] genirq: ARM dyntick cleanup

[Randy.Dunlap]

On Mon, 03 Jul 2006 19:27:07 +0200 Arjan van de Ven wrote:

> On Mon, 2006-07-03 at 10:13 -0700, Linus Torvalds wrote:
> >         #ifndef xyzzy
> >         #define zyzzy() /* empty */
> >         #endif
> > 
> 
> now if you write it as
> 
> #define zyzzy() do { ; } while (0)
> 
> it even works in a
> 
> if (foo())
> 	zyzzy();
> bar();
> 
> scenario 
> 
> (I know you know that, just pointing that out before people copy your
> example :-)

OK, I'll bite.  What part of Linus's macro doesn't work.
I compiled your foo/zyzzy/bar example with both his "empty"
macro and the do-while macro.  Same code produced both ways,
no compile warnings/errors.

---
~Randy
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/