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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 d3ed71e5cc
("drivers/iommu/intel-iommu.c: fix variable 'iommu' set but not used")

Signed-off-by: Qian Cai <cai@lca.pw>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Qian Cai 2019-06-03 10:05:19 -04:00 committed by Joerg Roedel
parent 42db7c6a40
commit af88ec3962
1 changed files with 2 additions and 1 deletions
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3
drivers/iommu/intel-iommu.c
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@ -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;