linux-kernel - Re: [tip:ras/core] x86/RAS: Simplify SMCA HWID descriptor struct

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Date:   Thu, 10 Nov 2016 20:53:24 +0100 (CET)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Borislav Petkov <bp@...e.de>
cc:     Yazen Ghannam <yazen.ghannam@....com>, mingo@...nel.org,
        hpa@...or.com, linux-kernel@...r.kernel.org,
        linux-tip-commits@...r.kernel.org
Subject: Re: [tip:ras/core] x86/RAS: Simplify SMCA HWID descriptor struct

On Thu, 10 Nov 2016, Borislav Petkov wrote:
> On Thu, Nov 10, 2016 at 12:50:04PM -0500, Yazen Ghannam wrote:
> > Adding extra parentheses in HWID_MCATYPE() gives the same assembly as the
> > original code and fixes the behavior.
> > 
> > > +	hwid_mcatype = HWID_MCATYPE((high & MCI_IPID_HWID)),
> > > +				    ((high & MCI_IPID_MCATYPE) >> 16));
> 
> Argh, the macro should be adding the additional parentheses:
> 
> #define HWID_MCATYPE(hwid, mcatype) (((hwid) << 16) | (mcatype))
> 
> That should fix the issue too.

Patch please.