[U-Boot] [PATCH 1/1] fix min/max macros in common.h

[Aaron Williams]

Any comments on this?  This bug caused me a lot of problems since we make use 
of 64-bit values quite a bit.

-Aaron

On Tuesday, January 25, 2011 02:30:55 pm Aaron Williams wrote:
> In some of my work with the Cavium Octeon 64-bit processor I ran into a
> problem with the min and max macros provided in common.h. The problem
> occurs if x is 32-bit and y is 64-bit. In this case, y will always be
> truncated to 32-bits.  This patch fixes this problem.
> 
> -Aaron
> 
> diff --git a/include/common.h b/include/common.h
> index d8c912d..cf5c076 100644
> --- a/include/common.h
> +++ b/include/common.h
> @@ -180,11 +180,13 @@ typedef void (interrupt_handler_t)(void *);
>   * General Purpose Utilities
>   */
>  #define min(X, Y)                              \
> -       ({ typeof (X) __x = (X), __y = (Y);     \
> +       ({ typeof (X) __x = (X);                \
> +               typeof (Y) __y = (Y);           \
>                 (__x < __y) ? __x : __y; })
> 
>  #define max(X, Y)                              \
> -       ({ typeof (X) __x = (X), __y = (Y);     \
> +       ({ typeof (X) __x = (X);                \
> +               typeof (Y) __y = (Y);           \
>                 (__x > __y) ? __x : __y; })
> 
>  #define MIN(x, y)  min(x, y)
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