linux-kernel - Re: [PATCH 10/10] iommu/vt-d: Misc macro clean up for SVM

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Date:   Mon, 18 Nov 2019 10:36:41 -0800
From:   Jacob Pan <jacob.jun.pan@...ux.intel.com>
To:     Lu Baolu <baolu.lu@...ux.intel.com>
Cc:     iommu@...ts.linux-foundation.org,
        LKML <linux-kernel@...r.kernel.org>,
        Joerg Roedel <joro@...tes.org>,
        David Woodhouse <dwmw2@...radead.org>,
        "Tian, Kevin" <kevin.tian@...el.com>,
        Raj Ashok <ashok.raj@...el.com>, Yi Liu <yi.l.liu@...el.com>,
        Eric Auger <eric.auger@...hat.com>,
        jacob.jun.pan@...ux.intel.com
Subject: Re: [PATCH 10/10] iommu/vt-d: Misc macro clean up for SVM

On Mon, 18 Nov 2019 10:23:34 +0800
Lu Baolu <baolu.lu@...ux.intel.com> wrote:

> Hi,
> 
> On 11/16/19 7:09 AM, Jacob Pan wrote:
> > Use combined macros for_each_svm_dev() to simplify SVM device
> > iteration and error checking.
> > 
> > Suggested-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> > Signed-off-by: Jacob Pan <jacob.jun.pan@...ux.intel.com>
> > Reviewed-by: Eric Auger <eric.auger@...hat.com>
> > ---
> >   drivers/iommu/intel-svm.c | 85
> > ++++++++++++++++++++++------------------------- 1 file changed, 40
> > insertions(+), 45 deletions(-)
> > 
> > diff --git a/drivers/iommu/intel-svm.c b/drivers/iommu/intel-svm.c
> > index 189865501411..a7f67a9da3fc 100644
> > --- a/drivers/iommu/intel-svm.c
> > +++ b/drivers/iommu/intel-svm.c
> > @@ -226,6 +226,10 @@ static const struct mmu_notifier_ops
> > intel_mmuops = { static DEFINE_MUTEX(pasid_mutex);
> >   static LIST_HEAD(global_svm_list);
> >   
> > +#define for_each_svm_dev(sdev, svm, dev)		\
> > +	list_for_each_entry(sdev, &svm->devs, list)	\
> > +		if (dev != sdev->dev) {} else  
> 
> "dev" has been reused in "sdev->dev", how about below?
> 
> #define for_each_svm_dev(sdev, svm, d)                  \
>          list_for_each_entry((sdev), &(svm)->devs, list) \
>                  if ((d) != (sdev)->dev) {} else
> 
sounds good. will do.

> Best regards,
> baolu
> 
> 
>  [...]  

[Jacob Pan]