This function does not modify its parameter 'dev' and it is not supposed
to do it. Therefore, constify it.

Signed-off-by: Michal Orzel <michal.or...@amd.com>
---
 xen/drivers/passthrough/arm/smmu-v3.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/xen/drivers/passthrough/arm/smmu-v3.c 
b/xen/drivers/passthrough/arm/smmu-v3.c
index bfdb62b395ad..bf053cdb6d5c 100644
--- a/xen/drivers/passthrough/arm/smmu-v3.c
+++ b/xen/drivers/passthrough/arm/smmu-v3.c
@@ -1468,7 +1468,7 @@ static bool arm_smmu_sid_in_range(struct arm_smmu_device 
*smmu, u32 sid)
        return sid < limit;
 }
 /* Forward declaration */
-static struct arm_smmu_device *arm_smmu_get_by_dev(struct device *dev);
+static struct arm_smmu_device *arm_smmu_get_by_dev(const struct device *dev);
 
 static int arm_smmu_add_device(u8 devfn, struct device *dev)
 {
@@ -2556,7 +2556,7 @@ static int __must_check arm_smmu_iotlb_flush(struct 
domain *d, dfn_t dfn,
        return arm_smmu_iotlb_flush_all(d);
 }
 
-static struct arm_smmu_device *arm_smmu_get_by_dev(struct device *dev)
+static struct arm_smmu_device *arm_smmu_get_by_dev(const struct device *dev)
 {
        struct arm_smmu_device *smmu = NULL;
 
-- 
2.25.1


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