iommu: Statically set module owner

It happens that the 3 drivers which first supported being modular are
also ones which play games with their pgsize_bitmap, so have non-const
iommu_ops where dynamically setting the owner manages to work out OK.
However, it's less than ideal to force that upon all drivers which want
to be modular - like the new sprd-iommu driver which now has a potential
bug in that regard - so let's just statically set the module owner and
let ops remain const wherever possible.
Reviewed-by: NChristoph Hellwig <hch@lst.de>
Acked-by: NWill Deacon <will@kernel.org>
Signed-off-by: NRobin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/31423b99ff609c3d4b291c701a7a7a810d9ce8dc.1617285386.git.robin.murphy@arm.comSigned-off-by: NJoerg Roedel <jroedel@suse.de>

drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c

@@ -2674,6 +2674,7 @@ static struct iommu_ops arm_smmu_ops = {
 	.sva_unbind		= arm_smmu_sva_unbind,
 	.sva_get_pasid		= arm_smmu_sva_get_pasid,
 	.pgsize_bitmap		= -1UL, /* Restricted during device attach */
+	.owner			= THIS_MODULE,
 };
 
 /* Probing and initialisation functions */

drivers/iommu/arm/arm-smmu/arm-smmu.c

@@ -1577,6 +1577,7 @@ static struct iommu_ops arm_smmu_ops = {
 	.put_resv_regions	= generic_iommu_put_resv_regions,
 	.def_domain_type	= arm_smmu_def_domain_type,
 	.pgsize_bitmap		= -1UL, /* Restricted during device attach */
+	.owner			= THIS_MODULE,
 };
 
 static void arm_smmu_device_reset(struct arm_smmu_device *smmu)

drivers/iommu/sprd-iommu.c

@@ -436,6 +436,7 @@ static const struct iommu_ops sprd_iommu_ops = {
 	.device_group	= sprd_iommu_device_group,
 	.of_xlate	= sprd_iommu_of_xlate,
 	.pgsize_bitmap	= ~0UL << SPRD_IOMMU_PAGE_SHIFT,
+	.owner		= THIS_MODULE,
 };
 
 static const struct of_device_id sprd_iommu_of_match[] = {

drivers/iommu/virtio-iommu.c

@@ -945,6 +945,7 @@ static struct iommu_ops viommu_ops = {
 	.get_resv_regions	= viommu_get_resv_regions,
 	.put_resv_regions	= generic_iommu_put_resv_regions,
 	.of_xlate		= viommu_of_xlate,
+	.owner			= THIS_MODULE,
 };
 
 static int viommu_init_vqs(struct viommu_dev *viommu)

include/linux/iommu.h

@@ -361,19 +361,12 @@ int  iommu_device_link(struct iommu_device   *iommu, struct device *link);
 void iommu_device_unlink(struct iommu_device *iommu, struct device *link);
 int iommu_deferred_attach(struct device *dev, struct iommu_domain *domain);
 
-static inline void __iommu_device_set_ops(struct iommu_device *iommu,
+static inline void iommu_device_set_ops(struct iommu_device *iommu,
 					  const struct iommu_ops *ops)
 {
 	iommu->ops = ops;
 }
 
-#define iommu_device_set_ops(iommu, ops)				\
-do {									\
-	struct iommu_ops *__ops = (struct iommu_ops *)(ops);		\
-	__ops->owner = THIS_MODULE;					\
-	__iommu_device_set_ops(iommu, __ops);				\
-} while (0)
-
 static inline void iommu_device_set_fwnode(struct iommu_device *iommu,
 					   struct fwnode_handle *fwnode)
 {