Messages in this thread Patch in this message | | | From | Qian Cai <> | Subject | [RESEND PATCH] iommu/intel: fix variable 'iommu' set but not used | Date | Wed, 22 May 2019 16:36:26 -0400 |
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The commit cf04eee8bf0e ("iommu/vt-d: Include ACPI devices in iommu=pt") added for_each_active_iommu() in iommu_prepare_static_identity_mapping() but never used the each element, i.e, "drhd->iommu".
drivers/iommu/intel-iommu.c: In function 'iommu_prepare_static_identity_mapping': drivers/iommu/intel-iommu.c:3037:22: warning: variable 'iommu' set but not used [-Wunused-but-set-variable] struct intel_iommu *iommu;
Fixed the warning by passing "drhd->iommu" directly to for_each_active_iommu() which all subsequent self-assignments should be ignored by a compiler anyway.
Signed-off-by: Qian Cai <cai@lca.pw> --- drivers/iommu/intel-iommu.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index a209199f3af6..86e1ddcb4a8e 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -3034,7 +3034,6 @@ static int __init iommu_prepare_static_identity_mapping(int hw) { struct pci_dev *pdev = NULL; struct dmar_drhd_unit *drhd; - struct intel_iommu *iommu; struct device *dev; int i; int ret = 0; @@ -3045,7 +3044,7 @@ static int __init iommu_prepare_static_identity_mapping(int hw) return ret; } - for_each_active_iommu(iommu, drhd) + for_each_active_iommu(drhd->iommu, drhd) for_each_active_dev_scope(drhd->devices, drhd->devices_cnt, i, dev) { struct acpi_device_physical_node *pn; struct acpi_device *adev; -- 1.8.3.1
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