The expression 1 << 31 results in undefined behaviour because the type of integer constant 1 is (signed) int and the result of shifting 1 by 31 bits is not representable in the (signed) int type.
Change the type of 1 to unsigned int by adding the U suffix. Signed-off-by: Xenia Ragiadakou <burzalod...@gmail.com> --- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h index cd48590ada30..44fbd499edea 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h @@ -96,7 +96,7 @@ #define CR2_E2H (1 << 0) #define ARM_SMMU_GBPA 0x44 -#define GBPA_UPDATE (1 << 31) +#define GBPA_UPDATE (1U << 31) #define GBPA_ABORT (1 << 20) #define ARM_SMMU_IRQ_CTRL 0x50 -- 2.34.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
