Re: [PATCH] iommu/renesas: fix unused-function warning

Simon Horman
2020-05-12T09:59:31Z

On Sat, May 09, 2020 at 12:02:16AM +0200, Arnd Bergmann wrote:
> gcc warns because the only reference to ipmmu_find_group
> is inside of an #ifdef:
>
> drivers/iommu/ipmmu-vmsa.c:878:28: error: 'ipmmu_find_group' defined but not used [-Werror=unused-function]
>
> Change the #ifdef to an equivalent IS_ENABLED().
>
> Fixes: 6580c8a78424 ("iommu/renesas: Convert to probe/release_device() call-backs")
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Reviewed-by: Simon Horman <horms@verge.net.au>

> ---
> drivers/iommu/ipmmu-vmsa.c | 7 ++-----
> 1 file changed, 2 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/iommu/ipmmu-vmsa.c b/drivers/iommu/ipmmu-vmsa.c
> index fb7e702dee23..4c2972f3153b 100644
> --- a/drivers/iommu/ipmmu-vmsa.c
> +++ b/drivers/iommu/ipmmu-vmsa.c
> @@ -903,11 +903,8 @@ static const struct iommu_ops ipmmu_ops = {
> .probe_device = ipmmu_probe_device,
> .release_device = ipmmu_release_device,
> .probe_finalize = ipmmu_probe_finalize,
> -#if defined(CONFIG_ARM) && !defined(CONFIG_IOMMU_DMA)
> - .device_group = generic_device_group,
> -#else
> - .device_group = ipmmu_find_group,
> -#endif
> + .device_group = IS_ENABLED(CONFIG_ARM) && !IS_ENABLED(CONFIG_IOMMU_DMA)
> + ? generic_device_group : ipmmu_find_group,
> .pgsize_bitmap = SZ_1G | SZ_2M | SZ_4K,
> .of_xlate = ipmmu_of_xlate,
> };
> --
> 2.26.0
>