On Tue, 2019-10-15 at 20:11 -0700, Nathan Chancellor wrote:
> When building arm64 allnoconfig, CONFIG_ZONE_DMA and CONFIG_ZONE_DMA32
> get disabled so there is a warning about max_dma being unused.
>
> ../arch/arm64/mm/init.c:215:16: warning: unused variable 'max_dma'
> [-Wunused-variable]
> unsigned long max_dma = min;
> ^
> 1 warning generated.
>
> Add an ifdef around the variable to fix this.
>
> Fixes: 1a8e1cef7603 ("arm64: use both ZONE_DMA and ZONE_DMA32")
> Signed-off-by: Nathan Chancellor <natechancel...@gmail.com>
> ---
>
> v1 -> v2:
>
> * Fix check for CONFIG_ZONE_DMA32 as pointed out by Will.
>
> arch/arm64/mm/init.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
> index 44f07fdf7a59..359c3b08b968 100644
> --- a/arch/arm64/mm/init.c
> +++ b/arch/arm64/mm/init.c
> @@ -212,7 +212,9 @@ static void __init zone_sizes_init(unsigned long min,
> unsigned long max)
> struct memblock_region *reg;
> unsigned long zone_size[MAX_NR_ZONES], zhole_size[MAX_NR_ZONES];
> unsigned long max_dma32 = min;
> +#if defined(CONFIG_ZONE_DMA) || defined(CONFIG_ZONE_DMA32)
> unsigned long max_dma = min;
> +#endif
>
> memset(zone_size, 0, sizeof(zone_size));
> Reviewed-by: Nicolas Saenz Julienne <nsaenzjulie...@suse.de> Thanks!
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