From af88ec3962010e3ac96bcfe5476c9bd68b42477f Mon Sep 17 00:00:00 2001 From: Qian Cai Date: Mon, 3 Jun 2019 10:05:19 -0400 Subject: [PATCH] iommu/vt-d: Silence a variable set but not used The commit "iommu/vt-d: Probe DMA-capable ACPI name space devices" introduced a compilation warning due to the "iommu" variable in for_each_active_iommu() but never used the for each element, i.e, "drhd->iommu". drivers/iommu/intel-iommu.c: In function 'probe_acpi_namespace_devices': drivers/iommu/intel-iommu.c:4639:22: warning: variable 'iommu' set but not used [-Wunused-but-set-variable] struct intel_iommu *iommu; Silence the warning the same way as in the commit d3ed71e5cc50 ("drivers/iommu/intel-iommu.c: fix variable 'iommu' set but not used") Signed-off-by: Qian Cai Signed-off-by: Joerg Roedel --- drivers/iommu/intel-iommu.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 1b89c340..ca0a1d5d 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -4587,7 +4587,8 @@ static int __init platform_optin_force_iommu(void) static int __init probe_acpi_namespace_devices(void) { struct dmar_drhd_unit *drhd; - struct intel_iommu *iommu; + /* To avoid a -Wunused-but-set-variable warning. */ + struct intel_iommu *iommu __maybe_unused; struct device *dev; int i, ret = 0; -- 2.7.4