Re: [PATCH] iommu/arm-smmu: Mark qcom_smmu_client_of_match as possibly unused

[Will Deacon]

On Wed, Jun 03, 2020 at 03:15:07PM -0600, Jordan Crouse wrote:
> When CONFIG_OF=n of_match_device() gets pre-processed out of existence
> leaving qcom-smmu_client_of_match unused. Mark it as possibly unused to
> keep the compiler from warning in that case.
> 
> Fixes: 0e764a01015d ("iommu/arm-smmu: Allow client devices to select direct 
> mapping")
> Reported-by: kbuild test robot 
> Signed-off-by: Jordan Crouse 
> ---
> 
>  drivers/iommu/arm-smmu-qcom.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/iommu/arm-smmu-qcom.c b/drivers/iommu/arm-smmu-qcom.c
> index cf01d0215a39..063b4388b0ff 100644
> --- a/drivers/iommu/arm-smmu-qcom.c
> +++ b/drivers/iommu/arm-smmu-qcom.c
> @@ -12,7 +12,7 @@ struct qcom_smmu {
>   struct arm_smmu_device smmu;
>  };
>  
> -static const struct of_device_id qcom_smmu_client_of_match[] = {
> +static const struct __maybe_unused of_device_id qcom_smmu_client_of_match[] 
> = {

Yikes, I've never seen that between the 'struct' and the struct name before!
I'd be inclined to stick it at the end, right before the '='.

With that:

Acked-by: Will Deacon 

Will
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[PATCH] iommu/arm-smmu: Mark qcom_smmu_client_of_match as possibly unused

[Jordan Crouse]

When CONFIG_OF=n of_match_device() gets pre-processed out of existence
leaving qcom-smmu_client_of_match unused. Mark it as possibly unused to
keep the compiler from warning in that case.

Fixes: 0e764a01015d ("iommu/arm-smmu: Allow client devices to select direct 
mapping")
Reported-by: kbuild test robot 
Signed-off-by: Jordan Crouse 
---

 drivers/iommu/arm-smmu-qcom.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iommu/arm-smmu-qcom.c b/drivers/iommu/arm-smmu-qcom.c
index cf01d0215a39..063b4388b0ff 100644
--- a/drivers/iommu/arm-smmu-qcom.c
+++ b/drivers/iommu/arm-smmu-qcom.c
@@ -12,7 +12,7 @@ struct qcom_smmu {
struct arm_smmu_device smmu;
 };
 
-static const struct of_device_id qcom_smmu_client_of_match[] = {
+static const struct __maybe_unused of_device_id qcom_smmu_client_of_match[] = {
{ .compatible = "qcom,adreno" },
{ .compatible = "qcom,mdp4" },
{ .compatible = "qcom,mdss" },
-- 
2.17.1

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