lkml.org 
[lkml]   [2007]   [Sep]   [7]   [last100]   RSS Feed
Views: [more markup]  [less markup]  [headers]  [forward] 
 
Messages in this thread
/
DateFri, 7 Sep 2007 08:49:08 +0200
FromAndi Kleen <>
SubjectRe: [patch 3/8] Immediate Values - Kconfig menu in EMBEDDED
> +config IMMEDIATE
> +	default y if !DISABLE_IMMEDIATE

It's still unclear to me why DISABLE_IMMEDIATE is needed. It would
be better to make it just the default.

> +config DISABLE_IMMEDIATE
> +	default y if EMBEDDED
> +	bool "Disable immediate values" if EMBEDDED
> +	depends on X86_32 || PPC || PPC64
> +	help
> +	  Disable code patching based immediate values for embedded systems. It
> +	  consumes slightly more memory and requires to modify the instruction
> +	  stream each time a variable is updated. 

>         Should really be disabled for
> +	  embedded systems with read-only text.

There are no such on x86 at least  And for other architectures like
PPC it would be better to have a high level CONFIG_READ_ONLY_TEXT
then that does the necessary changes internally.  But I'm not sure it's even 
supporting r/o text.

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

\
 
 \ /
  Last update: 2007-09-07 08:53    [from the cache]
©2003-2008