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authorQian Cai <cai@lca.pw>2019-05-31 22:30:49 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2019-06-01 15:51:32 -0700
commitd3ed71e5cc50e0df8362af295cbc906acef75558 (patch)
tree567b8c3daa759db4585be9f97cf649503ce8980f /drivers/iommu
parent8d7a7abfc6b42621adc070c7c29b013d7727ed6f (diff)
drivers/iommu/intel-iommu.c: fix variable 'iommu' set but not used
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 appending a compiler attribute __maybe_unused for it. Link: http://lkml.kernel.org/r/20190523013314.2732-1-cai@lca.pw Signed-off-by: Qian Cai <cai@lca.pw> Suggested-by: Andrew Morton <akpm@linux-foundation.org> Cc: Joerg Roedel <jroedel@suse.de> Cc: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/iommu')
-rw-r--r--drivers/iommu/intel-iommu.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index a209199f3af6..09b8ff0d856a 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -3034,7 +3034,8 @@ static int __init iommu_prepare_static_identity_mapping(int hw)
{
struct pci_dev *pdev = NULL;
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;
int ret = 0;