Re: [PATCH] Replace zone padding with a definition in cache.h

[Andrew Morton]

Christoph Lameter <christoph@xxxxxxxxxxx> wrote:
>
>  +#ifndef ____cacheline_pad_in_smp
>  +#if defined(CONFIG_SMP)
>  +#define ____cacheline_pad_in_smp struct { char  x; } ____cacheline_maxaligned_in_smp
>  +#else
>  +#define ____cacheline_pad_in_smp
>  +#endif
>  +#endif

That's going to spit a warning with older gcc's.  "warning: unnamed
struct/union that defines no instances".
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