iommu: Remove iommu_group_get_by_id()

This is never called.

Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/0-v1-60bbc66d7e92+24-rm_iommu_get_by_id_jgg@nvidia.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>

Author: jgunthorpe

drivers/iommu/iommu.c

@@ -882,35 +882,6 @@ struct iommu_group *iommu_group_alloc(void)
 }
 EXPORT_SYMBOL_GPL(iommu_group_alloc);
 
-struct iommu_group *iommu_group_get_by_id(int id)
-{
-	struct kobject *group_kobj;
-	struct iommu_group *group;
-	const char *name;
-
-	if (!iommu_group_kset)
-		return NULL;
-
-	name = kasprintf(GFP_KERNEL, "%d", id);
-	if (!name)
-		return NULL;
-
-	group_kobj = kset_find_obj(iommu_group_kset, name);
-	kfree(name);
-
-	if (!group_kobj)
-		return NULL;
-
-	group = container_of(group_kobj, struct iommu_group, kobj);
-	BUG_ON(group->id != id);
-
-	kobject_get(group->devices_kobj);
-	kobject_put(&group->kobj);
-
-	return group;
-}
-EXPORT_SYMBOL_GPL(iommu_group_get_by_id);
-
 /**
  * iommu_group_get_iommudata - retrieve iommu_data registered for a group
  * @group: the group

include/linux/iommu.h

@@ -460,7 +460,6 @@ extern bool iommu_present(struct bus_type *bus);
 extern bool device_iommu_capable(struct device *dev, enum iommu_cap cap);
 extern bool iommu_group_has_isolated_msi(struct iommu_group *group);
 extern struct iommu_domain *iommu_domain_alloc(struct bus_type *bus);
-extern struct iommu_group *iommu_group_get_by_id(int id);
 extern void iommu_domain_free(struct iommu_domain *domain);
 extern int iommu_attach_device(struct iommu_domain *domain,
 			       struct device *dev);
@@ -746,11 +745,6 @@ static inline struct iommu_domain *iommu_domain_alloc(struct bus_type *bus)
 	return NULL;
 }
 
-static inline struct iommu_group *iommu_group_get_by_id(int id)
-{
-	return NULL;
-}
-
 static inline void iommu_domain_free(struct iommu_domain *domain)
 {
 }