sparc64: Fix build errors with gcc-4.6.0

Most of the warnings emitted (we fail arch/sparc file
builds with -Werror) were legitimate but harmless, however
one case (n2_pcr_write) was a genuine bug.

Based almost entirely upon a patch by Sam Ravnborg.

Reported-by: Dennis Gilmore <dennis@ausil.us>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 0 insertions, 3 deletions

diff --git a/arch/sparc/kernel/iommu.c b/arch/sparc/kernel/iommu.c
index 72509d0e34be..6f01e8c83197 100644
--- a/arch/sparc/kernel/iommu.c
+++ b/arch/sparc/kernel/iommu.c
@@ -333,13 +333,10 @@ static void dma_4u_free_coherent(struct device *dev, size_t size,
                                  void *cpu, dma_addr_t dvma)
 {
         struct iommu *iommu;
-        iopte_t *iopte;
         unsigned long flags, order, npages;
 
         npages = IO_PAGE_ALIGN(size) >> IO_PAGE_SHIFT;
         iommu = dev->archdata.iommu;
-        iopte = iommu->page_table +
-                ((dvma - iommu->page_table_map_base) >> IO_PAGE_SHIFT);
 
         spin_lock_irqsave(&iommu->lock, flags);