From mboxrd@z Thu Jan  1 00:00:00 1970
From: Matthew Wilcox <willy@debian.org>
Date: Tue, 04 Jun 2002 12:02:41 +0000
Subject: Re: [Linux-ia64] Question about wbinvd
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To: linux-ia64@vger.kernel.org

On Tue, Jun 04, 2002 at 04:45:42PM +0900, Takanori Kawano wrote:
> I have a question about wbinvd in acpi code.
> 
> In 2.4.18, wbinvd is implemented in drivers/acpi/include/platform/acgcc.h
>  as follows.

If you look at the latest ACPI patch (20020517), you will see:

-       wbinvd();
+       ACPI_FLUSH_CPU_CACHE ();

On i386, ACPI_FLUSH_CPU_CACHE is defined to be wbinvd, but on ia64 it is
defined to be a no-op.  So the wbinvd in the ACPI code is no longer used.
I presume it was decided it is not necessary.

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