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

[Denis Vlasenko <vda@ilport.com.ua>]

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?
--
vda

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