[ARM] Convert DMA cache handling to take const void * args

The DMA cache handling functions take virtual addresses, but in the
form of unsigned long arguments.  This leads to a little confusion
about what exactly they take.  So, convert them to take const void *
instead.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 6 insertions, 7 deletions

diff --git a/arch/arm/mm/consistent.c b/arch/arm/mm/consistent.c
index 83bd035c7d5e..166aee13c4b1 100644
--- a/arch/arm/mm/consistent.c
+++ b/arch/arm/mm/consistent.c
@@ -205,10 +205,10 @@ __dma_alloc(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gfp,
          * kernel direct-mapped region for device DMA.
          */
         {
-                unsigned long kaddr = (unsigned long)page_address(page);
-                memset(page_address(page), 0, size);
-                dmac_flush_range(kaddr, kaddr + size);
-                outer_flush_range(__pa(kaddr), __pa(kaddr) + size);
+                void *ptr = page_address(page);
+                memset(ptr, 0, size);
+                dmac_flush_range(ptr, ptr + size);
+                outer_flush_range(__pa(ptr), __pa(ptr) + size);
         }
 
         /*
@@ -481,10 +481,9 @@ core_initcall(consistent_init);
  * platforms with CONFIG_DMABOUNCE.
  * Use the driver DMA support - see dma-mapping.h (dma_sync_*)
  */
-void consistent_sync(void *vaddr, size_t size, int direction)
+void consistent_sync(const void *start, size_t size, int direction)
 {
-        unsigned long start = (unsigned long)vaddr;
-        unsigned long end   = start + size;
+        const void *end = start + size;
 
         BUG_ON(!virt_addr_valid(start) || !virt_addr_valid(end));