On Fri, Jul 20, 2007 at 10:22:21AM -0700, H. Peter Anvin wrote:
> Andi Kleen wrote:
> > On Friday 20 July 2007 00:55:40 Glauber de Oliveira Costa wrote:
> >> This patch uses the already-existant wbinvd() macro to replace
> >> raw assembly to perform this very same task in some .c files
> >>
> >> Signed-off-by: Glauber de Oliveira Costa <[EMAIL PROTECTED]>
> >>
> >> diff --git a/arch/x86_64/kernel/tce.c b/arch/x86_64/kernel/tce.c
> >> index f61fb8e..afbb951 100644
> >> --- a/arch/x86_64/kernel/tce.c
> >> +++ b/arch/x86_64/kernel/tce.c
> >> @@ -42,7 +42,7 @@ static inline void flush_tce(void* tceaddr)
> >> if (cpu_has_clflush)
> >> asm volatile("clflush (%0)" :: "r" (tceaddr));
> >> else
> >> - asm volatile("wbinvd":::"memory");
> >> + wbinvd();
> >
> > I guess it can be just removed there. I don' think there are any
> > calgary machines without clflush
> >
> That seems like an unsafe thing to do (unless we err out somewhere);
> lest there is, say, a microcode update disabling clflush due to an
> erratum.
I agree.
Cheers,
Muli
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