From f79f0faf65fedc6d8ef44c5aff3b673ae0d1793c Mon Sep 17 00:00:00 2001
From: Gabriel Craciunescu <crazy@frugalware.org>
Date: Mon, 9 Apr 2018 20:57:38 +0200
Subject: [PATCH] Revert "swiotlb: remove various exports"

This reverts commit 4bd89ed39b2ab8dc4ac4b6c59b07d420b0213bec.

I know NVIDIA ... but lets be nice..
Until sorted revert the whole commit
see : https://bugzilla.kernel.org/show_bug.cgi?id=198997

---
 lib/swiotlb.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/lib/swiotlb.c b/lib/swiotlb.c
index c43ec2271469..0039b7c5e690 100644
--- a/lib/swiotlb.c
+++ b/lib/swiotlb.c
@@ -605,6 +605,7 @@ phys_addr_t swiotlb_tbl_map_single(struct device *hwdev,
 
 	return tlb_addr;
 }
+EXPORT_SYMBOL_GPL(swiotlb_tbl_map_single);
 
 /*
  * Allocates bounce buffer and returns its kernel virtual address.
@@ -674,6 +675,7 @@ void swiotlb_tbl_unmap_single(struct device *hwdev, phys_addr_t tlb_addr,
 	}
 	spin_unlock_irqrestore(&io_tlb_lock, flags);
 }
+EXPORT_SYMBOL_GPL(swiotlb_tbl_unmap_single);
 
 void swiotlb_tbl_sync_single(struct device *hwdev, phys_addr_t tlb_addr,
 			     size_t size, enum dma_data_direction dir,
@@ -705,6 +707,7 @@ void swiotlb_tbl_sync_single(struct device *hwdev, phys_addr_t tlb_addr,
 		BUG();
 	}
 }
+EXPORT_SYMBOL_GPL(swiotlb_tbl_sync_single);
 
 static inline bool dma_coherent_ok(struct device *dev, dma_addr_t addr,
 		size_t size)
@@ -881,6 +884,7 @@ dma_addr_t swiotlb_map_page(struct device *dev, struct page *page,
 
 	return swiotlb_phys_to_dma(dev, io_tlb_overflow_buffer);
 }
+EXPORT_SYMBOL_GPL(swiotlb_map_page);
 
 /*
  * Unmap a single streaming mode DMA translation.  The dma_addr and size must
@@ -921,6 +925,7 @@ void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr,
 {
 	unmap_single(hwdev, dev_addr, size, dir, attrs);
 }
+EXPORT_SYMBOL_GPL(swiotlb_unmap_page);
 
 /*
  * Make physical memory consistent for a single streaming mode DMA translation
@@ -958,6 +963,7 @@ swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
 {
 	swiotlb_sync_single(hwdev, dev_addr, size, dir, SYNC_FOR_CPU);
 }
+EXPORT_SYMBOL(swiotlb_sync_single_for_cpu);
 
 void
 swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr,
@@ -965,6 +971,7 @@ swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr,
 {
 	swiotlb_sync_single(hwdev, dev_addr, size, dir, SYNC_FOR_DEVICE);
 }
+EXPORT_SYMBOL(swiotlb_sync_single_for_device);
 
 /*
  * Map a set of buffers described by scatterlist in streaming mode for DMA.
@@ -1016,6 +1023,7 @@ swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems,
 	}
 	return nelems;
 }
+EXPORT_SYMBOL(swiotlb_map_sg_attrs);
 
 /*
  * Unmap a set of streaming mode DMA translations.  Again, cpu read rules
@@ -1035,6 +1043,7 @@ swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
 		unmap_single(hwdev, sg->dma_address, sg_dma_len(sg), dir,
 			     attrs);
 }
+EXPORT_SYMBOL(swiotlb_unmap_sg_attrs);
 
 /*
  * Make physical memory consistent for a set of streaming mode DMA translations
@@ -1062,6 +1071,7 @@ swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
 {
 	swiotlb_sync_sg(hwdev, sg, nelems, dir, SYNC_FOR_CPU);
 }
+EXPORT_SYMBOL(swiotlb_sync_sg_for_cpu);
 
 void
 swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
@@ -1069,12 +1079,14 @@ swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
 {
 	swiotlb_sync_sg(hwdev, sg, nelems, dir, SYNC_FOR_DEVICE);
 }
+EXPORT_SYMBOL(swiotlb_sync_sg_for_device);
 
 int
 swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr)
 {
 	return (dma_addr == swiotlb_phys_to_dma(hwdev, io_tlb_overflow_buffer));
 }
+EXPORT_SYMBOL(swiotlb_dma_mapping_error);
 
 /*
  * Return whether the given device DMA address mask can be supported
@@ -1087,6 +1099,7 @@ swiotlb_dma_supported(struct device *hwdev, u64 mask)
 {
 	return swiotlb_phys_to_dma(hwdev, io_tlb_end - 1) <= mask;
 }
+EXPORT_SYMBOL(swiotlb_dma_supported);
 
 #ifdef CONFIG_DMA_DIRECT_OPS
 void *swiotlb_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle,
-- 
2.17.0