linux-kernel - Re: [PATCH 4/4] ARM: convert PCI defines to variables

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: <20110628234130.GJ21898@n2100.arm.linux.org.uk>
Date:	Wed, 29 Jun 2011 00:41:30 +0100
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Rob Herring <robherring2@...il.com>
Cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Michal Simek <monstr@...str.eu>,
	Rob Herring <rob.herring@...xeda.com>, nico@...xnic.net
Subject: Re: [PATCH 4/4] ARM: convert PCI defines to variables

On Tue, Jun 28, 2011 at 05:57:39PM -0500, Rob Herring wrote:
> From: Rob Herring <rob.herring@...xeda.com>
> 
> Convert PCIBIOS_MIN_IO, PCIBIOS_MIN_MEM, and PCIMEM_BASE to variables to allow
> multi-platform builds. This also removes the requirement for a platform to
> have a mach/hardware.h.

Please don't include PCIMEM_BASE in that - move that into asm/vga.h and
call it VGA_BASE because that's really what it is.  There's also the
matter of a definition of a HAS_ symbol...

> diff --git a/arch/arm/include/asm/vga.h b/arch/arm/include/asm/vga.h
> index 250a4dd..86290df 100644
> --- a/arch/arm/include/asm/vga.h
> +++ b/arch/arm/include/asm/vga.h
> @@ -2,7 +2,7 @@
>  #define ASMARM_VGA_H
>  
>  #include <linux/io.h>
> -#include <mach/hardware.h>
> +#include <asm/pci.h>
>  
>  #define VGA_MAP_MEM(x,s)	(PCIMEM_BASE + (x))
>  

VGA is not dependent on having PCI - there have been ARM platforms which
have VGA without PCI.

> diff --git a/arch/arm/mach-pxa/include/mach/hardware.h b/arch/arm/mach-pxa/include/mach/hardware.h
> index b4ea392..de63ca3 100644
> --- a/arch/arm/mach-pxa/include/mach/hardware.h
> +++ b/arch/arm/mach-pxa/include/mach/hardware.h
> @@ -337,8 +337,6 @@ extern unsigned long get_clock_tick_rate(void);
>  #endif
>  
>  #if defined(CONFIG_MACH_ARMCORE) && defined(CONFIG_PCI)
> -#define PCIBIOS_MIN_IO		0
> -#define PCIBIOS_MIN_MEM		0
>  #define ARCH_HAS_DMA_SET_COHERENT_MASK
>  #endif
>  

This definitely breaks because ARCH_HAS_DMA_SET_COHERENT_MASK needs to
be picked up by linux/dma-mapping.h.  However, this may already be
broken as there's no clear path where this reliably happens.
--
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/