Re: [PATCH 1/9] remove volatile keyword from clflush.

Jeremy Fitzhardinge
2007-12-06T21:11:20Z

Glauber de Oliveira Costa wrote:
> the p parameter is an explicit memory reference, and is
> enough to prevent gcc to being nasty here. The volatile
> seems completely not needed.
>

The usual reason for these types of "volatiles" is to make type checking
happier, since "volatile void *" is compatible with any argument you
might pass. IOW, if you pass a plain "char *" then the compiler will
promote it to "volatile char *" and not complain, and passing an already
volatile pointer will be OK too.

The volatile isn't there to modify the generated code in any way.

J