iommu/vt-d: Kill dmar_domain->id

This field is now obsolete because all places use the
per-iommu domain-ids. Kill the remaining uses of this field
and remove it.

Signed-off-by: Joerg Roedel <jroedel@suse.de>

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 2a64c3fe49db5a7c50973184f70416a663ba2161..91f0c3d5a6acaeb473d3eafade95d62029c23e64 100644 (file)
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -374,7 +374,6 @@ static int hw_pass_through = 1;
 #define DOMAIN_FLAG_STATIC_IDENTITY    (1 << 1)
 
 struct dmar_domain {
-       int     id;                     /* domain id */
        int     nid;                    /* node id */
        DECLARE_BITMAP(iommu_bmp, DMAR_UNITS_SUPPORTED);
                                        /* bitmap of iommus this domain uses*/
@@ -1655,8 +1654,6 @@ static void free_dmar_iommu(struct intel_iommu *iommu)
 
 static struct dmar_domain *alloc_domain(int flags)
 {
-       /* domain id for virtual machine, it won't be set in context */
-       static atomic_t vm_domid = ATOMIC_INIT(0);
        struct dmar_domain *domain;
 
        domain = alloc_domain_mem();
@@ -1668,8 +1665,6 @@ static struct dmar_domain *alloc_domain(int flags)
        domain->flags = flags;
        spin_lock_init(&domain->iommu_lock);
        INIT_LIST_HEAD(&domain->devices);
-       if (flags & DOMAIN_FLAG_VIRTUAL_MACHINE)
-               domain->id = atomic_inc_return(&vm_domid);
 
        return domain;
 }
@@ -2392,8 +2387,7 @@ static struct dmar_domain *get_domain_for_dev(struct device *dev, int gaw)
        domain = alloc_domain(0);
        if (!domain)
                return NULL;
-       domain->id = iommu_attach_domain(domain, iommu);
-       if (domain->id < 0) {
+       if (iommu_attach_domain(domain, iommu) < 0) {
                free_domain_mem(domain);
                return NULL;
        }
@@ -2446,8 +2440,7 @@ static int iommu_domain_identity_map(struct dmar_domain *domain,
                return -ENOMEM;
        }
 
-       pr_debug("Mapping reserved region %llx-%llx for domain %d\n",
-                start, end, domain->id);
+       pr_debug("Mapping reserved region %llx-%llx\n", start, end);
        /*
         * RMRR range might have overlap with physical memory range,
         * clear it first