swiotlb: remove swiotlb_arch_range_needs_mapping

Nobody uses swiotlb_arch_range_needs_mapping().

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Becky Bruce <beckyb@kernel.crashing.org>

diff --git a/arch/x86/kernel/pci-swiotlb.c b/arch/x86/kernel/pci-swiotlb.c
index ea675cfe76fe83538f784c04f2eb5700fb2be8b2..165bd7f93bb12691091a32a0f346fd31edb74c15 100644 (file)
--- a/arch/x86/kernel/pci-swiotlb.c
+++ b/arch/x86/kernel/pci-swiotlb.c
@@ -23,11 +23,6 @@ phys_addr_t swiotlb_bus_to_phys(struct device *hwdev, dma_addr_t baddr)
        return baddr;
 }
 
-int __weak swiotlb_arch_range_needs_mapping(phys_addr_t paddr, size_t size)
-{
-       return 0;
-}
-
 static void *x86_swiotlb_alloc_coherent(struct device *hwdev, size_t size,
                                        dma_addr_t *dma_handle, gfp_t flags)
 {

diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h
index 6bc50944040fbca995063eeaadc4545d52992acd..a977da24f17c1fd0a8684fe84c0008f522054682 100644 (file)
--- a/include/linux/swiotlb.h
+++ b/include/linux/swiotlb.h
@@ -28,8 +28,6 @@ extern dma_addr_t swiotlb_phys_to_bus(struct device *hwdev,
 extern phys_addr_t swiotlb_bus_to_phys(struct device *hwdev,
                                       dma_addr_t address);
 
-extern int swiotlb_arch_range_needs_mapping(phys_addr_t paddr, size_t size);
-
 extern void
 *swiotlb_alloc_coherent(struct device *hwdev, size_t size,
                        dma_addr_t *dma_handle, gfp_t flags);

diff --git a/lib/swiotlb.c b/lib/swiotlb.c
index 3c4c21cdf43d0d57da39997ee496ba0bbcc004db..dc1cd1f5369e3fb0e3e089140bfd49ff9096a7bd 100644 (file)
--- a/lib/swiotlb.c
+++ b/lib/swiotlb.c
@@ -141,11 +141,6 @@ int __weak swiotlb_arch_address_needs_mapping(struct device *hwdev,
        return !is_buffer_dma_capable(dma_get_mask(hwdev), addr, size);
 }
 
-int __weak swiotlb_arch_range_needs_mapping(phys_addr_t paddr, size_t size)
-{
-       return 0;
-}
-
 static void swiotlb_print_info(unsigned long bytes)
 {
        phys_addr_t pstart, pend;
@@ -312,11 +307,6 @@ address_needs_mapping(struct device *hwdev, dma_addr_t addr, size_t size)
        return swiotlb_arch_address_needs_mapping(hwdev, addr, size);
 }
 
-static inline int range_needs_mapping(phys_addr_t paddr, size_t size)
-{
-       return swiotlb_force || swiotlb_arch_range_needs_mapping(paddr, size);
-}
-
 static int is_swiotlb_buffer(char *addr)
 {
        return addr >= io_tlb_start && addr < io_tlb_end;
@@ -646,8 +636,7 @@ dma_addr_t swiotlb_map_page(struct device *dev, struct page *page,
         * we can safely return the device addr and not worry about bounce
         * buffering it.
         */
-       if (!address_needs_mapping(dev, dev_addr, size) &&
-           !range_needs_mapping(phys, size))
+       if (!address_needs_mapping(dev, dev_addr, size) && !swiotlb_force)
                return dev_addr;
 
        /*
@@ -810,7 +799,7 @@ swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems,
                phys_addr_t paddr = sg_phys(sg);
                dma_addr_t dev_addr = swiotlb_phys_to_bus(hwdev, paddr);
 
-               if (range_needs_mapping(paddr, sg->length) ||
+               if (swiotlb_force ||
                    address_needs_mapping(hwdev, dev_addr, sg->length)) {
                        void *map = map_single(hwdev, sg_phys(sg),
                                               sg->length, dir);