iommu/amd: Remove amd_iommu_pd_list

This variable hold a global list of allocated protection
domains in the AMD IOMMU driver. By now this list is never
traversed anymore, so the list and the lock protecting it
can be removed.

Cc: Tom Murphy <tmurphy@arista.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

drivers/iommu/amd_iommu_init.c

@@ -188,12 +188,6 @@ static bool amd_iommu_pc_present __read_mostly;
 
 bool amd_iommu_force_isolation __read_mostly;
 
-/*
- * List of protection domains - used during resume
- */
-LIST_HEAD(amd_iommu_pd_list);
-spinlock_t amd_iommu_pd_lock;
-
 /*
  * Pointer to the device table which is shared by all AMD IOMMUs
  * it is indexed by the PCI device id or the HT unit id and contains
@@ -2526,8 +2520,6 @@ static int __init early_amd_iommu_init(void)
 	 */
 	__set_bit(0, amd_iommu_pd_alloc_bitmap);
 
-	spin_lock_init(&amd_iommu_pd_lock);
-
 	/*
 	 * now the data structures are allocated and basically initialized
 	 * start the real acpi table scan