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Subject[PATCH 2/2] iommu/arm-smmu: fix -Wunused-const-variable warning
Date
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: ‘arm_smmu_of_match’ 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@socionext.com>
---

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
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