linux-kernel - Re: [PATCH 2/4] ARM: nommu: dynamic exception base address setting

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Message-ID: <20170122033745.GB13580@afzalpc>
Date:   Sun, 22 Jan 2017 09:07:45 +0530
From:   Afzal Mohammed <afzal.mohd.ma@...il.com>
To:     Vladimir Murzin <vladimir.murzin@....com>
Cc:     Russell King - ARM Linux <linux@...linux.org.uk>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/4] ARM: nommu: dynamic exception base address setting

Hi,

On Fri, Jan 20, 2017 at 09:50:22PM +0530, Afzal Mohammed wrote:
> On Thu, Jan 19, 2017 at 01:59:09PM +0000, Vladimir Murzin wrote:

> > You can use
> > 
> >     cpuid_feature_extract(CPUID_EXT_PFR1, 4)
> >     
> > and add a comment explaining what we are looking for and why.

W.r.t comments, tried to keep it concise, C tokens doing a part of it.

> Yes, that is better, was not aware of this, did saw CPUID_EXT_PFR1 as
> an unused macro.

> > > +#ifdef CONFIG_CPU_CP15
> > > +	vectors_base = setup_vectors_base();
> > > +#endif
> > 
> > alternatively it can be
> > 
> > 	unsigned long vector_base = IS_ENABLED(CONFIG_CPU_CP15) ? setup_vbar() : 0;
> 
> Yes that certainly is better.

Have kept the function name as setup_vector_base() as in addition to
setting up VBAR, V bit also has to be configured by it - so that
function name remains true to it's name.

v2 with changes has been posted.

Regards
afzal