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    Subject[PATCH 5/5] swiotlb: EXPORT_SYMBOL_GPL functions + variables that are defined in the header file.
    Date
    Make the functions and variables that are now declared in the swiotlb.h
    header file visible by the linker.

    Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
    ---
    lib/swiotlb.c | 11 +++++++++++
    1 files changed, 11 insertions(+), 0 deletions(-)

    diff --git a/lib/swiotlb.c b/lib/swiotlb.c
    index b3eef1c..c6bfa5d 100644
    --- a/lib/swiotlb.c
    +++ b/lib/swiotlb.c
    @@ -57,19 +57,24 @@ int swiotlb_force;
    * API.
    */
    char *swiotlb_bk_start, *swiotlb_bk_end;
    +EXPORT_SYMBOL_GPL(swiotlb_bk_start);
    +EXPORT_SYMBOL_GPL(swiotlb_bk_end);

    /*
    * The number of IO TLB blocks (in groups of 64) betweeen swiotlb_bk_start and
    * swiotlb_bk_end. This is command line adjustable via setup_io_tlb_npages.
    */
    unsigned long swiotlb_bk_nslabs;
    +EXPORT_SYMBOL_GPL(swiotlb_bk_nslabs);

    /*
    * When the IOMMU overflows we return a fallback buffer. This sets the size.
    */
    unsigned long swiotlb_bk_overflow = 32*1024;
    +EXPORT_SYMBOL_GPL(swiotlb_bk_overflow);

    void *swiotlb_bk_overflow_buffer;
    +EXPORT_SYMBOL_GPL(swiotlb_bk_overflow_buffer);

    /*
    * This is a free list describing the number of free entries available from
    @@ -312,6 +317,7 @@ int is_swiotlb_buffer(phys_addr_t paddr)
    return paddr >= virt_to_phys(swiotlb_bk_start) &&
    paddr < virt_to_phys(swiotlb_bk_end);
    }
    +EXPORT_SYMBOL_GPL(is_swiotlb_buffer);

    /*
    * Bounce: copy the swiotlb buffer back to the original dma location
    @@ -353,6 +359,7 @@ void swiotlb_bounce(phys_addr_t phys, char *dma_addr, size_t size,
    memcpy(phys_to_virt(phys), dma_addr, size);
    }
    }
    +EXPORT_SYMBOL_GPL(swiotlb_bounce);

    /*
    * Allocates bounce buffer and returns its kernel virtual address.
    @@ -459,6 +466,7 @@ found:

    return dma_addr;
    }
    +EXPORT_SYMBOL_GPL(swiotlb_bk_map_single);

    /*
    * dma_addr is the kernel virtual address of the bounce buffer to unmap.
    @@ -504,6 +512,7 @@ swiotlb_bk_unmap_single(struct device *hwdev, char *dma_addr, size_t size,
    }
    spin_unlock_irqrestore(&swiotlb_bk_lock, flags);
    }
    +EXPORT_SYMBOL_GPL(swiotlb_bk_unmap_single);

    void
    swiotlb_bk_sync_single(struct device *hwdev, char *dma_addr, size_t size,
    @@ -531,6 +540,7 @@ swiotlb_bk_sync_single(struct device *hwdev, char *dma_addr, size_t size,
    BUG();
    }
    }
    +EXPORT_SYMBOL_GPL(swiotlb_bk_sync_single);

    void *
    swiotlb_alloc_coherent(struct device *hwdev, size_t size,
    @@ -622,6 +632,7 @@ swiotlb_full(struct device *dev, size_t size, int dir, int do_panic)
    if (dir == DMA_TO_DEVICE)
    panic("DMA: Random memory could be DMA read\n");
    }
    +EXPORT_SYMBOL_GPL(swiotlb_full);

    /*
    * Map a single buffer of the indicated size for DMA in streaming mode. The
    --
    1.6.2.5


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