[PATCH] ARM64: dma: move swiotlb helpers under CONFIG_IOMMU_DMA

[Olof Johansson]

Fixes the following tinyconfig warnings:
arch/arm64/mm/dma-mapping.c:174:12: warning: '__swiotlb_mmap_pfn' defined but 
not used [-Wunused-function]
arch/arm64/mm/dma-mapping.c:163:12: warning: '__swiotlb_get_sgtable_page' 
defined but not used [-Wunused-function]

Signed-off-by: Olof Johansson <o...@lixom.net>
---
 arch/arm64/mm/dma-mapping.c | 58 ++++++++++++++++++++++-----------------------
 1 file changed, 29 insertions(+), 29 deletions(-)

diff --git a/arch/arm64/mm/dma-mapping.c b/arch/arm64/mm/dma-mapping.c
index 3a703e5d4e32..62356c64e180 100644
--- a/arch/arm64/mm/dma-mapping.c
+++ b/arch/arm64/mm/dma-mapping.c
@@ -160,35 +160,6 @@ void arch_sync_dma_for_cpu(struct device *dev, phys_addr_t 
paddr,
        __dma_unmap_area(phys_to_virt(paddr), size, dir);
 }
 
-static int __swiotlb_get_sgtable_page(struct sg_table *sgt,
-                                     struct page *page, size_t size)
-{
-       int ret = sg_alloc_table(sgt, 1, GFP_KERNEL);
-
-       if (!ret)
-               sg_set_page(sgt->sgl, page, PAGE_ALIGN(size), 0);
-
-       return ret;
-}
-
-static int __swiotlb_mmap_pfn(struct vm_area_struct *vma,
-                             unsigned long pfn, size_t size)
-{
-       int ret = -ENXIO;
-       unsigned long nr_vma_pages = vma_pages(vma);
-       unsigned long nr_pages = PAGE_ALIGN(size) >> PAGE_SHIFT;
-       unsigned long off = vma->vm_pgoff;
-
-       if (off < nr_pages && nr_vma_pages <= (nr_pages - off)) {
-               ret = remap_pfn_range(vma, vma->vm_start,
-                                     pfn + off,
-                                     vma->vm_end - vma->vm_start,
-                                     vma->vm_page_prot);
-       }
-
-       return ret;
-}
-
 static int __init atomic_pool_init(void)
 {
        pgprot_t prot = __pgprot(PROT_NORMAL_NC);
@@ -358,6 +329,35 @@ arch_initcall(arm64_dma_init);
 #include <linux/platform_device.h>
 #include <linux/amba/bus.h>
 
+static int __swiotlb_get_sgtable_page(struct sg_table *sgt,
+                                     struct page *page, size_t size)
+{
+       int ret = sg_alloc_table(sgt, 1, GFP_KERNEL);
+
+       if (!ret)
+               sg_set_page(sgt->sgl, page, PAGE_ALIGN(size), 0);
+
+       return ret;
+}
+
+static int __swiotlb_mmap_pfn(struct vm_area_struct *vma,
+                             unsigned long pfn, size_t size)
+{
+       int ret = -ENXIO;
+       unsigned long nr_vma_pages = vma_pages(vma);
+       unsigned long nr_pages = PAGE_ALIGN(size) >> PAGE_SHIFT;
+       unsigned long off = vma->vm_pgoff;
+
+       if (off < nr_pages && nr_vma_pages <= (nr_pages - off)) {
+               ret = remap_pfn_range(vma, vma->vm_start,
+                                     pfn + off,
+                                     vma->vm_end - vma->vm_start,
+                                     vma->vm_page_prot);
+       }
+
+       return ret;
+}
+
 /* Thankfully, all cache ops are by VA so we can ignore phys here */
 static void flush_page(struct device *dev, const void *virt, phys_addr_t phys)
 {
-- 
2.11.0