linux-kernel - Re: [PATCH 09/12] unicore32 machine related files: hardware registers

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <201102221519.03423.arnd@arndb.de>
Date:	Tue, 22 Feb 2011 15:19:03 +0100
From:	Arnd Bergmann <arnd@...db.de>
To:	"Guan Xuetao" <gxt@...c.pku.edu.cn>
Cc:	linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
	"'Greg KH'" <greg@...ah.com>
Subject: Re: [PATCH 09/12] unicore32 machine related files: hardware registers

On Tuesday 22 February 2011, Guan Xuetao wrote:
> > > diff --git a/arch/unicore32/include/mach/hardware.h b/arch/unicore32/include/mach/hardware.h
> > > index 3fb7236..ebce7de 100644
> > > --- a/arch/unicore32/include/mach/hardware.h
> > > +++ b/arch/unicore32/include/mach/hardware.h
> > > @@ -17,19 +17,14 @@
> > >
> > >  #include "PKUnity.h"
> > >
> > > -#define io_p2v(x)  ((x) - PKUNITY_IOSPACE_BASE)
> > > -#define io_v2p(x)  ((x) + PKUNITY_IOSPACE_BASE)
> > > +#define io_p2v(x)  ((x) - PKUNITY_MMIO_BASE)
> > > +#define io_v2p(x)  ((x) + PKUNITY_MMIO_BASE)
> > >
> I apply the patch as following:
> 
> @@ -22,8 +22,7 @@
>  
>  #ifndef __ASSEMBLY__
>  
> -# define __REG(x)      (*((volatile unsigned long *)io_p2v(x)))
> -# define __PREG(x)     (io_v2p((unsigned long)&(x)))
> +# define __REG(x)      (void __iomem *)io_p2v(x)

The patch looks correct, but if you make the the definition for
PKUNITY_MMIO_BASE contain the cast to (void __iomem *), you no
longer need another cast.

> __REG reserved only for all registers prefix.
> And all using for __REG converted to readl/writel.

Fair enough.

	Arnd
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/