iommu/tegra241-cmdqv: Fix unused variable warning

willdeacon · willdeacon · commit 5492f0c4085a · 2024-10-29T15:58:24.000Z
While testing some io-pgtable changes, I ran into a compiler warning
from the Tegra CMDQ driver:

  drivers/iommu/arm/arm-smmu-v3/tegra241-cmdqv.c:803:23: warning: unused variable 'cmdqv_debugfs_dir' [-Wunused-variable]
    803 | static struct dentry *cmdqv_debugfs_dir;
        |                       ^~~~~~~~~~~~~~~~~
  1 warning generated.

Guard the variable declaration with CONFIG_IOMMU_DEBUGFS to silence the
warning.

Signed-off-by: Will Deacon &lt;will@kernel.org&gt;
diff --git a/drivers/iommu/arm/arm-smmu-v3/tegra241-cmdqv.c b/drivers/iommu/arm/arm-smmu-v3/tegra241-cmdqv.c
@@ -800,7 +800,9 @@ static int tegra241_cmdqv_init_structures(struct arm_smmu_device *smmu)
 	return 0;
 }
 
+#ifdef CONFIG_IOMMU_DEBUGFS
 static struct dentry *cmdqv_debugfs_dir;
+#endif
 
 static struct arm_smmu_device *
 __tegra241_cmdqv_probe(struct arm_smmu_device *smmu, struct resource *res,

Original file line number	Diff line number	Diff line change
`@@ -800,7 +800,9 @@ static int tegra241_cmdqv_init_structures(struct arm_smmu_device *smmu)`
`800`	`800`	`return 0;`
`801`	`801`	`}`
`802`	`802`
	`803`	`+#ifdef CONFIG_IOMMU_DEBUGFS`
`803`	`804`	`static struct dentry *cmdqv_debugfs_dir;`
	`805`	`+#endif`
`804`	`806`
`805`	`807`	`static struct arm_smmu_device *`
`806`	`808`	`__tegra241_cmdqv_probe(struct arm_smmu_device smmu, struct resource res,`