linux-kernel - [PATCH] iommu: move sg_table wrapper out of CONFIG_IOMMU

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Date:   Tue, 30 Jun 2020 10:17:56 +0200
From:   Marek Szyprowski <m.szyprowski@...sung.com>
To:     iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org
Cc:     Marek Szyprowski <m.szyprowski@...sung.com>,
        Joerg Roedel <joro@...tes.org>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Subject: [PATCH] iommu: move sg_table wrapper out of CONFIG_IOMMU_SUPPORT

Move the recently added sg_table wrapper out of CONFIG_IOMMU_SUPPORT to
let the client code copile also when IOMMU support is disabled.

Fixes: 48530d9fab0d ("iommu: add generic helper for mapping sgtable objects")
Signed-off-by: Marek Szyprowski <m.szyprowski@...sung.com>
---
 include/linux/iommu.h | 32 ++++++++++++++++----------------
 1 file changed, 16 insertions(+), 16 deletions(-)

diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 5f0b7859d2eb..5657d4fef9f2 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -457,22 +457,6 @@ extern phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, dma_addr_t io
 extern void iommu_set_fault_handler(struct iommu_domain *domain,
 			iommu_fault_handler_t handler, void *token);
 
-/**
- * iommu_map_sgtable - Map the given buffer to the IOMMU domain
- * @domain:	The IOMMU domain to perform the mapping
- * @iova:	The start address to map the buffer
- * @sgt:	The sg_table object describing the buffer
- * @prot:	IOMMU protection bits
- *
- * Creates a mapping at @iova for the buffer described by a scatterlist
- * stored in the given sg_table object in the provided IOMMU domain.
- */
-static inline size_t iommu_map_sgtable(struct iommu_domain *domain,
-			unsigned long iova, struct sg_table *sgt, int prot)
-{
-	return iommu_map_sg(domain, iova, sgt->sgl, sgt->orig_nents, prot);
-}
-
 extern void iommu_get_resv_regions(struct device *dev, struct list_head *list);
 extern void iommu_put_resv_regions(struct device *dev, struct list_head *list);
 extern void generic_iommu_put_resv_regions(struct device *dev,
@@ -1079,6 +1063,22 @@ static inline struct iommu_fwspec *dev_iommu_fwspec_get(struct device *dev)
 }
 #endif /* CONFIG_IOMMU_API */
 
+/**
+ * iommu_map_sgtable - Map the given buffer to the IOMMU domain
+ * @domain:	The IOMMU domain to perform the mapping
+ * @iova:	The start address to map the buffer
+ * @sgt:	The sg_table object describing the buffer
+ * @prot:	IOMMU protection bits
+ *
+ * Creates a mapping at @iova for the buffer described by a scatterlist
+ * stored in the given sg_table object in the provided IOMMU domain.
+ */
+static inline size_t iommu_map_sgtable(struct iommu_domain *domain,
+			unsigned long iova, struct sg_table *sgt, int prot)
+{
+	return iommu_map_sg(domain, iova, sgt->sgl, sgt->orig_nents, prot);
+}
+
 #ifdef CONFIG_IOMMU_DEBUGFS
 extern	struct dentry *iommu_debugfs_dir;
 void iommu_debugfs_setup(void);
-- 
2.17.1