Re: [patch 5/5] PowerPC: switch to generic WARN_ON / BUG_ON

[Olof Johansson]

On Sun, Jan 06, 2008 at 10:16:04PM +1100, Benjamin Herrenschmidt wrote:
> 
> On Sat, 2008-01-05 at 19:12 -0800, Arjan van de Ven wrote:
> > From: Olof Johansson <olof@xxxxxxxxx>
> > 
> > Not using the ppc-specific WARN_ON/BUG_ON constructs actually saves about
> > 4K text on a ppc64_defconfig.  The main reason seems to be that prepping
> > the arguments to the conditional trap instructions is more work than just
> > doing a compare and branch.
> 
> I'm a bit annoyed by that one ... for obvious reasons... I wish gcc
> could be better here. Also, we can't completely remove the support for
> the trap since we use that in asm in various places...

The support isn't removed, and the trap is still used. This patch has
been posted a bunch of times before and been in -mm for quite a while.


-Olof

--
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/