linux-kernel - Re: [PATCH] I386: Deactivate the test for the dead CONFIG_DEBUG_PAGE

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Message-ID: <468E890A.1070504@s5r6.in-berlin.de>
Date:	Fri, 06 Jul 2007 20:25:14 +0200
From:	Stefan Richter <stefanr@...6.in-berlin.de>
To:	"Robert P. J. Day" <rpjday@...dspring.com>
CC:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...l.org>,
	Jeremy Fitzhardinge <jeremy@...source.com>,
	Chris Wright <chrisw@...s-sol.org>,
	Zachary Amsden <zach@...are.com>,
	Rusty Russell <rusty@...tcorp.com.au>,
	virtualization@...ts.osdl.org
Subject: Re: [PATCH] I386: Deactivate the test for the dead CONFIG_DEBUG_PAGE_TYPE
 variable.

Robert P. J. Day wrote:
> Signed-off-by: Robert P. J. Day <rpjday@...dspring.com>
> 
> ---
> 
> diff --git a/arch/i386/kernel/vmi.c b/arch/i386/kernel/vmi.c

Maintainers are apparently those under "PARAVIRT_OPS INTERFACE".
CCs added.

> index c12720d..e3ce5c8 100644
> --- a/arch/i386/kernel/vmi.c
> +++ b/arch/i386/kernel/vmi.c
> @@ -235,7 +235,7 @@ static void vmi_nop(void)
>  {
>  }
> 
> -#ifdef CONFIG_DEBUG_PAGE_TYPE
> +#if 0 /* debug page type */
> 
>  #ifdef CONFIG_X86_PAE
>  #define MAX_BOOT_PTS (2048+4+1)
> @@ -336,7 +336,7 @@ static void vmi_check_page_type(u32 pfn, int type)
>  #else
>  #define vmi_set_page_type(p,t) do { } while (0)
>  #define vmi_check_page_type(p,t) do { } while (0)
> -#endif
> +#endif /* debug page type */
> 
>  #ifdef CONFIG_HIGHPTE
>  static void *vmi_kmap_atomic_pte(struct page *page, enum km_type type)

This misnamed CONFIG_DEBUG_PAGE_TYPE (it's not a Kconfig variable) has
about 120 lines debug code dangling on it.  So, replacing it by #if 0
will hopefully motivate a kind janitor to send a removal patch for that
debug code eventually.  I don't do so just now because that code went in
between 2.6.20 and 2.6.21-rc1, i.e. not so long ago.
-- 
Stefan Richter
-=====-=-=== -=== --==-
http://arcgraph.de/sr/
-
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