Re: [-mm patch] i386: enable REGPARM by default

[Jens Axboe <axboe@suse.de>]

On Sat, Jun 25 2005, Denis Vlasenko wrote:
> On Friday 24 June 2005 23:09, Adrian Bunk wrote:
> > This patch should _not_ go into Linus' tree.
> > 
> > At some time in the future, we want to unconditionally enable REGPARM on 
> > i386.
> > 
> > Let's give it a bit broader testing coverage among -mm users.
> > 
> > This patch:
> > - removes the dependency of REGPARM on EXPERIMENTAL
> > - let REGPARM default to y
> > 
> > This patch assumes that people who use -mm are willing to test some more 
> > experimental features.
> > 
> > After this patch, REGPARM is still a config option users can disable.
> > 
> > Signed-off-by: Adrian Bunk <bunk@stusta.de>
> 
> Jens Axboe had hit an obscure bug with regparm just yesterday.
> It happened for him with gcc 3.3.5.
> 
> I have a preprocessed .c file which allows to reporduce this.
> For me, gcc 3.3.6 is okay. need to build 3.3.5 and test.
> 
> Meanwhile, maybe we shall prohibit regparm if gcc <=3.3.6 or 3.4?

It triggered without regparm as well, so I don't think that is to blame
here.

-- 
Jens Axboe