linux-kernel - Re: [PATCH 1/4] asm/sections: add text/data checking functions for arches to override

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Date:	Tue, 23 Jun 2009 15:40:22 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Mike Frysinger <vapier@...too.org>
Cc:	linux-kernel@...r.kernel.org, mingo@...hat.com,
	rgetz@...ckfin.uclinux.org
Subject: Re: [PATCH 1/4] asm/sections: add text/data checking functions for
 arches to override

On Wed, 17 Jun 2009 12:22:21 -0400
Mike Frysinger <vapier@...too.org> wrote:

> Some ports (like the Blackfin arch) have a discontiguous memory map which
> means there may be text or data that falls outside of the standard range
> of the start/end text/data symbols.  Creating some helper functions allows
> these non-standard ports to declare these regions without adversely
> affecting anyone else.
> 

The patches look OK to me.

I assumed they're for 2.6.32.

> index 4ce48e8..ee19462 100644
> --- a/include/asm-generic/sections.h
> +++ b/include/asm-generic/sections.h
> @@ -20,4 +20,20 @@ extern char __start_rodata[], __end_rodata[];
>  #define dereference_function_descriptor(p) (p)
>  #endif
>  
> +/* random extra sections (if any).  Override
> + * in asm/sections.h */
> +#ifndef arch_is_kernel_text
> +static inline int arch_is_kernel_text(unsigned long addr)
> +{
> +	return 0;
> +}
> +#endif
> +
> +#ifndef arch_is_kernel_data
> +static inline int arch_is_kernel_data(unsigned long addr)
> +{
> +	return 0;
> +}
> +#endif

I suppose that for completeness and consistency etc really we should have

#define arch_is_kernel_text arch_is_kernel_text
#define arch_is_kernel_data arch_is_kernel_data

in here.
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