File 5cdeac7f-AMD-IOMMU-adjust-IOMMU-list-head-init.patch of Package xen.12874

# Commit f6c1247184b6a5cfa57491f0ec4483896789fda6
# Date 2019-05-17 14:43:43 +0200
# Author Jan Beulich <jbeulich@suse.com>
# Committer Jan Beulich <jbeulich@suse.com>
AMD/IOMMU: adjust IOMMU list head initialization

Do this statically, which will allow accessing the (empty) list even
without having come through acpi_ivrs_init().

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>

--- a/xen/drivers/passthrough/amd/iommu_init.c
+++ b/xen/drivers/passthrough/amd/iommu_init.c
@@ -36,7 +36,7 @@ static struct tasklet amd_iommu_irq_task
 unsigned int __read_mostly ivrs_bdf_entries;
 u8 __read_mostly ivhd_type;
 static struct radix_tree_root ivrs_maps;
-struct list_head amd_iommu_head;
+LIST_HEAD_READ_MOSTLY(amd_iommu_head);
 struct table_struct device_table;
 bool_t iommuv2_enabled;
 
--- a/xen/drivers/passthrough/amd/pci_amd_iommu.c
+++ b/xen/drivers/passthrough/amd/pci_amd_iommu.c
@@ -173,8 +173,6 @@ static void amd_iommu_setup_domain_devic
 
 int __init acpi_ivrs_init(void)
 {
-    INIT_LIST_HEAD(&amd_iommu_head);
-
     if ( !iommu_enable && !iommu_intremap )
         return 0;