From: Ren Zhijie <renzhijie2@huawei.com>
Date: Tue, 26 Jul 2022 11:35:20 +0800
Subject: ACPI/IORT: Fix build error implicit-function-declaration
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Patch-mainline: v6.0-rc1
Git-commit: de0269765b268717b70f16f809560e83d5a8d0e7
References: jsc#PED-1408

If CONFIG_ACPI_IORT=y and CONFIG_IOMMU_API is not set,
make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu-,
will be failed, like this:

drivers/acpi/arm64/iort.c: In function ‘iort_get_rmr_sids’:
drivers/acpi/arm64/iort.c:1406:2: error: implicit declaration of function ‘iort_iommu_rmr_get_resv_regions’; did you mean ‘iort_iommu_get_resv_regions’? [-Werror=implicit-function-declaration]
  iort_iommu_rmr_get_resv_regions(iommu_fwnode, NULL, head);
  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  iort_iommu_get_resv_regions
cc1: some warnings being treated as errors
make[3]: *** [drivers/acpi/arm64/iort.o] Error 1

The function iort_iommu_rmr_get_resv_regions()
is declared under CONFIG_IOMMU_API,
and the callers of iort_get_rmr_sids() and iort_put_rmr_sids()
would select IOMMU_API.

To fix this error, move the definitions to #ifdef CONFIG_IOMMU_API.

Fixes: e302eea8f497 ("ACPI/IORT: Add a helper to retrieve RMR info directly")
Signed-off-by: Ren Zhijie <renzhijie2@huawei.com>
Acked-by: Hanjun Guo <guohanjun@huawei.com>
Link: https://lore.kernel.org/r/20220726033520.47865-1-renzhijie2@huawei.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Acked-by: Lee, Chun-Yi <jlee@suse.com>
---
 drivers/acpi/arm64/iort.c |   56 +++++++++++++++++++++++-----------------------
 1 file changed, 28 insertions(+), 28 deletions(-)

--- a/drivers/acpi/arm64/iort.c
+++ b/drivers/acpi/arm64/iort.c
@@ -1162,6 +1162,34 @@ void iort_iommu_get_resv_regions(struct
 	iort_iommu_rmr_get_resv_regions(fwspec->iommu_fwnode, dev, head);
 }
 
+/**
+ * iort_get_rmr_sids - Retrieve IORT RMR node reserved regions with
+ *                     associated StreamIDs information.
+ * @iommu_fwnode: fwnode associated with IOMMU
+ * @head: Resereved region list
+ */
+void iort_get_rmr_sids(struct fwnode_handle *iommu_fwnode,
+		       struct list_head *head)
+{
+	iort_iommu_rmr_get_resv_regions(iommu_fwnode, NULL, head);
+}
+EXPORT_SYMBOL_GPL(iort_get_rmr_sids);
+
+/**
+ * iort_put_rmr_sids - Free memory allocated for RMR reserved regions.
+ * @iommu_fwnode: fwnode associated with IOMMU
+ * @head: Resereved region list
+ */
+void iort_put_rmr_sids(struct fwnode_handle *iommu_fwnode,
+		       struct list_head *head)
+{
+	struct iommu_resv_region *entry, *next;
+
+	list_for_each_entry_safe(entry, next, head, list)
+		entry->free(NULL, entry);
+}
+EXPORT_SYMBOL_GPL(iort_put_rmr_sids);
+
 static inline bool iort_iommu_driver_enabled(u8 type)
 {
 	switch (type) {
@@ -1394,34 +1422,6 @@ int iort_dma_get_ranges(struct device *d
 		return nc_dma_get_range(dev, size);
 }
 
-/**
- * iort_get_rmr_sids - Retrieve IORT RMR node reserved regions with
- *                     associated StreamIDs information.
- * @iommu_fwnode: fwnode associated with IOMMU
- * @head: Resereved region list
- */
-void iort_get_rmr_sids(struct fwnode_handle *iommu_fwnode,
-		       struct list_head *head)
-{
-	iort_iommu_rmr_get_resv_regions(iommu_fwnode, NULL, head);
-}
-EXPORT_SYMBOL_GPL(iort_get_rmr_sids);
-
-/**
- * iort_put_rmr_sids - Free memory allocated for RMR reserved regions.
- * @iommu_fwnode: fwnode associated with IOMMU
- * @head: Resereved region list
- */
-void iort_put_rmr_sids(struct fwnode_handle *iommu_fwnode,
-		       struct list_head *head)
-{
-	struct iommu_resv_region *entry, *next;
-
-	list_for_each_entry_safe(entry, next, head, list)
-		entry->free(NULL, entry);
-}
-EXPORT_SYMBOL_GPL(iort_put_rmr_sids);
-
 static void __init acpi_iort_register_irq(int hwirq, const char *name,
 					  int trigger,
 					  struct resource *res)