linux-kernel - Re: [PATCH] arc: kernel: use exporting symbol instead of static inline for arc_get_core

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Message-ID: <526E010F.90602@asianux.com>
Date:	Mon, 28 Oct 2013 14:15:43 +0800
From:	Chen Gang <gang.chen@...anux.com>
To:	"vgupta@...opsys.com" <vgupta@...opsys.com>, noamc@...hip.com
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] arc: kernel: use exporting symbol instead of static inline
 for arc_get_core_freq()

On 10/28/2013 11:32 AM, Chen Gang wrote:
> Need export arc_get_core_freq() instead of let it static inline, or if
> other individual modules use it (e.g. use BASE_BAUD), it can not find
> core_freq variable.
> 
> Signed-off-by: Chen Gang <gang.chen@...anux.com>
> ---
>  arch/arc/include/asm/clk.h |    9 +--------
>  arch/arc/kernel/clk.c      |    9 ++++++++-
>  2 files changed, 9 insertions(+), 9 deletions(-)
> 
> diff --git a/arch/arc/include/asm/clk.h b/arch/arc/include/asm/clk.h
> index bf9d29f..256321a 100644
> --- a/arch/arc/include/asm/clk.h
> +++ b/arch/arc/include/asm/clk.h
> @@ -9,14 +9,7 @@
>  #ifndef _ASM_ARC_CLK_H
>  #define _ASM_ARC_CLK_H
>  
> -/* Although we can't really hide core_freq, the accessor is still better way */
> -extern unsigned long core_freq;
> -
> -static inline unsigned long arc_get_core_freq(void)
> -{
> -	return core_freq;
> -}
> -
> +extern unsigned long arc_get_core_freq(void);
>  extern int arc_set_core_freq(unsigned long);
>  
>  #endif
> diff --git a/arch/arc/kernel/clk.c b/arch/arc/kernel/clk.c
> index 10c7b0b..9f4602f 100644
> --- a/arch/arc/kernel/clk.c
> +++ b/arch/arc/kernel/clk.c
> @@ -6,9 +6,16 @@
>   * published by the Free Software Foundation.
>   */
>  
> +#include <linux/module.h>
>  #include <asm/clk.h>
>  
> -unsigned long core_freq = 80000000;
> +static unsigned long core_freq = 80000000;
> +
> +unsigned long arc_get_core_freq(void)
> +{
> +	return core_freq;
> +}
> +EXPORT_SYMBOL_GPL(arc_get_core_freq);
>

Oh, sorry, need use EXPORT_SYMBOL instead of EXPORT_SYMBOL_GPL for it. I
will send patch v2.


>  /*
>   * As of now we default to device-tree provided clock
> 


-- 
Chen Gang
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