[PATCH] powerpc: Build fix for mpc52xx

[Grant Likely]

On Wed, Mar 10, 2010 at 3:03 PM, Jeff Mahoney <jeffm at suse.com> wrote:
> mpc52xx_gpt_wdt_setup is defined as 0, which causes the following build
> failure with gcc 4.5, since it's built with -Werror.
>
> arch/powerpc/platforms/52xx/mpc52xx_gpt.c:761:3: error: statement with no effect
>
> Defining it as do { } while(0) fixes the problem.

Hi Jeff, thanks for the patch.  I've picked it up with a change.
Instead of a #define, I've changed it to an empty static inline.
As akpm likes to say, we should try to program in C, not pre-processor.  :-)

diff --git a/arch/powerpc/platforms/52xx/mpc52xx_gpt.c
b/arch/powerpc/platforms/52x
index 072b948..5d7cc88 100644
--- a/arch/powerpc/platforms/52xx/mpc52xx_gpt.c
+++ b/arch/powerpc/platforms/52xx/mpc52xx_gpt.c
@@ -711,7 +711,11 @@ static int __devinit mpc52xx_gpt_wdt_init(void)
        return 0;
 }

-#define mpc52xx_gpt_wdt_setup(x, y)            (0)
+static inline int mpc52xx_gpt_wdt_setup(struct mpc52xx_gpt_priv *gpt,
+                                       const u32 *period)
+{
+       return 0;
+}

 #endif /*  CONFIG_MPC5200_WDT  */

>
> Signed-off-by: Jeff Mahoney <jeffm at suse.com>
> ---
>  arch/powerpc/platforms/52xx/mpc52xx_gpt.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> --- a/arch/powerpc/platforms/52xx/mpc52xx_gpt.c
> +++ b/arch/powerpc/platforms/52xx/mpc52xx_gpt.c
> @@ -711,7 +711,7 @@ static int __devinit mpc52xx_gpt_wdt_ini
>        return 0;
>  }
>
> -#define mpc52xx_gpt_wdt_setup(x, y)            (0)
> +#define mpc52xx_gpt_wdt_setup(x, y)            do { } while(0)
>
>  #endif /*  CONFIG_MPC5200_WDT  */
>
> --
> Jeff Mahoney
> SUSE Labs
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> Linuxppc-dev at lists.ozlabs.org
> https://lists.ozlabs.org/listinfo/linuxppc-dev
>



-- 
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.