alpha: use iommu_num_pages function in IOMMU code

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Muli Ben-Yehuda <muli@il.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 5 insertions, 12 deletions

diff --git a/arch/alpha/kernel/pci_iommu.c b/arch/alpha/kernel/pci_iommu.c
index 2179c602032a..b9094da05d7a 100644
--- a/arch/alpha/kernel/pci_iommu.c
+++ b/arch/alpha/kernel/pci_iommu.c
@@ -41,13 +41,6 @@ mk_iommu_pte(unsigned long paddr)
         return (paddr >> (PAGE_SHIFT-1)) | 1;
 }
 
-static inline long
-calc_npages(long bytes)
-{
-        return (bytes + PAGE_SIZE - 1) >> PAGE_SHIFT;
-}
-
-
 /* Return the minimum of MAX or the first power of two larger
    than main memory.  */
 
@@ -287,7 +280,7 @@ pci_map_single_1(struct pci_dev *pdev, void *cpu_addr, size_t size,
         if (!arena || arena->dma_base + arena->size - 1 > max_dma)
                 arena = hose->sg_isa;
 
-        npages = calc_npages((paddr & ~PAGE_MASK) + size);
+        npages = iommu_num_pages(paddr, size, PAGE_SIZE);
 
         /* Force allocation to 64KB boundary for ISA bridges. */
         if (pdev && pdev == isa_bridge)
@@ -387,7 +380,7 @@ pci_unmap_single(struct pci_dev *pdev, dma_addr_t dma_addr, size_t size,
                 BUG();
         }
 
-        npages = calc_npages((dma_addr & ~PAGE_MASK) + size);
+        npages = iommu_num_pages(dma_addr, size, PAGE_SIZE);
 
         spin_lock_irqsave(&arena->lock, flags);
 
@@ -580,7 +573,7 @@ sg_fill(struct device *dev, struct scatterlist *leader, struct scatterlist *end,
            contiguous.  */
 
         paddr &= ~PAGE_MASK;
-        npages = calc_npages(paddr + size);
+        npages = iommu_num_pages(paddr, size, PAGE_SIZE);
         dma_ofs = iommu_arena_alloc(dev, arena, npages, 0);
         if (dma_ofs < 0) {
                 /* If we attempted a direct map above but failed, die.  */
@@ -616,7 +609,7 @@ sg_fill(struct device *dev, struct scatterlist *leader, struct scatterlist *end,
                         sg++;
                 }
 
-                npages = calc_npages((paddr & ~PAGE_MASK) + size);
+                npages = iommu_num_pages(paddr, size, PAGE_SIZE);
 
                 paddr &= PAGE_MASK;
                 for (i = 0; i < npages; ++i, paddr += PAGE_SIZE)
@@ -775,7 +768,7 @@ pci_unmap_sg(struct pci_dev *pdev, struct scatterlist *sg, int nents,
                 DBGA("    (%ld) sg [%lx,%lx]\n",
                      sg - end + nents, addr, size);
 
-                npages = calc_npages((addr & ~PAGE_MASK) + size);
+                npages = iommu_num_pages(addr, size, PAGE_SIZE);
                 ofs = (addr - arena->dma_base) >> PAGE_SHIFT;
                 iommu_arena_free(arena, ofs, npages);