x86/amd-iommu: Move find_protection_domain to helper functions
This is a helper function and when its placed in the helper
function section we can remove its forward declaration.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index e5bbe9a..405f8da 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -59,7 +59,6 @@
static int dma_ops_unity_map(struct dma_ops_domain *dma_dom,
struct unity_map_entry *e);
-static struct dma_ops_domain *find_protection_domain(u16 devid);
static u64 *alloc_pte(struct protection_domain *domain,
unsigned long address, int end_lvl,
u64 **pte_page, gfp_t gfp);
@@ -84,6 +83,34 @@
return calc_devid(pdev->bus->number, pdev->devfn);
}
+/*
+ * In this function the list of preallocated protection domains is traversed to
+ * find the domain for a specific device
+ */
+static struct dma_ops_domain *find_protection_domain(u16 devid)
+{
+ struct dma_ops_domain *entry, *ret = NULL;
+ unsigned long flags;
+ u16 alias = amd_iommu_alias_table[devid];
+
+ if (list_empty(&iommu_pd_list))
+ return NULL;
+
+ spin_lock_irqsave(&iommu_pd_list_lock, flags);
+
+ list_for_each_entry(entry, &iommu_pd_list, list) {
+ if (entry->target_dev == devid ||
+ entry->target_dev == alias) {
+ ret = entry;
+ break;
+ }
+ }
+
+ spin_unlock_irqrestore(&iommu_pd_list_lock, flags);
+
+ return ret;
+}
+
#ifdef CONFIG_AMD_IOMMU_STATS
/*
@@ -1456,34 +1483,6 @@
}
/*
- * In this function the list of preallocated protection domains is traversed to
- * find the domain for a specific device
- */
-static struct dma_ops_domain *find_protection_domain(u16 devid)
-{
- struct dma_ops_domain *entry, *ret = NULL;
- unsigned long flags;
- u16 alias = amd_iommu_alias_table[devid];
-
- if (list_empty(&iommu_pd_list))
- return NULL;
-
- spin_lock_irqsave(&iommu_pd_list_lock, flags);
-
- list_for_each_entry(entry, &iommu_pd_list, list) {
- if (entry->target_dev == devid ||
- entry->target_dev == alias) {
- ret = entry;
- break;
- }
- }
-
- spin_unlock_irqrestore(&iommu_pd_list_lock, flags);
-
- return ret;
-}
-
-/*
* In the dma_ops path we only have the struct device. This function
* finds the corresponding IOMMU, the protection domain and the
* requestor id for a given device.