linux-kernel - Re: [PATCH] Fix broken debug output reserve_region_with

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Message-ID: <86802c440810162039v7c347888i34e26058b70f37d5@mail.gmail.com>
Date:	Thu, 16 Oct 2008 20:39:45 -0700
From:	"Yinghai Lu" <yinghai@...nel.org>
To:	benh@...nel.crashing.org
Cc:	"Linus Torvalds" <torvalds@...ux-foundation.org>,
	Geert.Uytterhoeven@...ycom.com, hpa@...or.com,
	linux-kernel@...r.kernel.org, mingo@...e.hu,
	"David Miller" <davem@...emloft.net>,
	"Andrew Morton" <akpm@...ux-foundation.org>
Subject: Re: [PATCH] Fix broken debug output reserve_region_with_split()

On Thu, Oct 16, 2008 at 8:06 PM, Benjamin Herrenschmidt
<benh@...nel.crashing.org> wrote:
> From: Linus Torvalds <torvalds@...ux-foundation.org>
>
> Implement %pR to print struct resource content
>
> Add a %pR option to the kernel vsnprintf that prints the range of
> addresses inside a struct resource passed by pointer.
>
> Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
> Signed-off-by: Benjamin Herrenschmidt <benh@...nel.crashing.org>
> ---
>
> And this one has updated comments.
>
> Index: linux-work/lib/vsprintf.c
> ===================================================================
> --- linux-work.orig/lib/vsprintf.c      2008-10-17 13:30:18.000000000 +1100
> +++ linux-work/lib/vsprintf.c   2008-10-17 14:04:58.000000000 +1100
> @@ -24,6 +24,7 @@
>  #include <linux/kernel.h>
>  #include <linux/kallsyms.h>
>  #include <linux/uaccess.h>
> +#include <linux/ioport.h>
>
>  #include <asm/page.h>          /* for PAGE_SIZE */
>  #include <asm/div64.h>
> @@ -550,18 +551,38 @@ static char *symbol_string(char *buf, ch
>  #endif
>  }
>
> +static char *resource_string(char *buf, char *end, struct resource *res, int field_width, int precision, int flags)
> +{
> +       /* room for the actual numbers, the two "0x", -, [, ] and the final zero */
> +       char sym[4*sizeof(resource_size_t) + 8];
> +       char *p = sym, *pend = sym + sizeof(sym);
> +
> +       *p++ = '[';
> +       p = number(p, pend, res->start, 16, -1, -1, SPECIAL | SMALL);
> +       *p++ = '-';
> +       p = number(p, pend, res->end, 16, -1, -1, SPECIAL | SMALL);
> +       *p++ = ']';
> +       *p = 0;
> +
> +       return string(buf, end, sym, field_width, precision, flags);

so x64 64bit,io ports will be print out 8 digital?

YH
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