[PATCH 2/2] iommu/arm-smmu: fix -Wunused-const-variable warning

[Masahiro Yamada]

For ARCH=arm builds, OF is not necessarily enabled, that is, you can
build this driver without CONFIG_OF.

When CONFIG_OF is unset, of_match_ptr() is NULL, and arm_smmu_of_match
is left orphan.

Building it with W=1 emits a warning:

drivers/iommu/arm-smmu.c:1904:34: warning: âarm_smmu_of_matchâ defined but not used [-Wunused-const-variable=]
 static const struct of_device_id arm_smmu_of_match[] = {
                                  ^~~~~~~~~~~~~~~~~

There are two ways to fix this:

 - annotate arm_smmu_of_match with __maybe_unused (or surround the
   code with #ifdef CONFIG_OF ... #endif)

 - stop using of_match_ptr()

This commit took the latter solution.

It slightly increases the object size, but it is probably not a big deal
because arm_smmu_device_dt_probe() is also compiled irrespective of
CONFIG_OF.

Signed-off-by: Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx>
---

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

diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index 4f1a350d9529..0446a3bf6bd0 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -2267,7 +2267,7 @@ static const struct dev_pm_ops arm_smmu_pm_ops = {
 static struct platform_driver arm_smmu_driver = {
 	.driver	= {
 		.name			= "arm-smmu",
-		.of_match_table		= of_match_ptr(arm_smmu_of_match),
+		.of_match_table		= arm_smmu_of_match,
 		.pm			= &arm_smmu_pm_ops,
 		.suppress_bind_attrs	= true,
 	},
-- 
2.17.1