nios2: remove __ioremap

The cacheflag argument to __ioremap is always 0, so just implement
ioremap directly.

Signed-off-by: Christoph Hellwig <hch@lst.de>

arch/nios2/include/asm/io.h

@@ -25,29 +25,17 @@
 #define writew_relaxed(x, addr)	writew(x, addr)
 #define writel_relaxed(x, addr)	writel(x, addr)
 
-extern void __iomem *__ioremap(unsigned long physaddr, unsigned long size,
-			unsigned long cacheflag);
+void __iomem *ioremap(unsigned long physaddr, unsigned long size);
 extern void __iounmap(void __iomem *addr);
 
-static inline void __iomem *ioremap(unsigned long physaddr, unsigned long size)
-{
-	return __ioremap(physaddr, size, 0);
-}
-
-static inline void __iomem *ioremap_nocache(unsigned long physaddr,
-						unsigned long size)
-{
-	return __ioremap(physaddr, size, 0);
-}
-
 static inline void iounmap(void __iomem *addr)
 {
 	__iounmap(addr);
 }
 
-#define ioremap_nocache ioremap_nocache
-#define ioremap_wc ioremap_nocache
-#define ioremap_wt ioremap_nocache
+#define ioremap_nocache ioremap
+#define ioremap_wc ioremap
+#define ioremap_wt ioremap
 
 /* Pages to physical address... */
 #define page_to_phys(page)	virt_to_phys(page_to_virt(page))

arch/nios2/mm/ioremap.c

@@ -112,8 +112,7 @@ static int remap_area_pages(unsigned long address, unsigned long phys_addr,
 /*
  * Map some physical address range into the kernel address space.
  */
-void __iomem *__ioremap(unsigned long phys_addr, unsigned long size,
-			unsigned long cacheflag)
+void __iomem *ioremap(unsigned long phys_addr, unsigned long size)
 {
 	struct vm_struct *area;
 	unsigned long offset;
@@ -139,15 +138,6 @@ void __iomem *__ioremap(unsigned long phys_addr, unsigned long size,
 				return NULL;
 	}
 
-	/*
-	 * Map uncached objects in the low part of address space to
-	 * CONFIG_NIOS2_IO_REGION_BASE
-	 */
-	if (IS_MAPPABLE_UNCACHEABLE(phys_addr) &&
-	    IS_MAPPABLE_UNCACHEABLE(last_addr) &&
-	    !(cacheflag & _PAGE_CACHED))
-		return (void __iomem *)(CONFIG_NIOS2_IO_REGION_BASE + phys_addr);
-
 	/* Mappings have to be page-aligned */
 	offset = phys_addr & ~PAGE_MASK;
 	phys_addr &= PAGE_MASK;
@@ -158,14 +148,13 @@ void __iomem *__ioremap(unsigned long phys_addr, unsigned long size,
 	if (!area)
 		return NULL;
 	addr = area->addr;
-	if (remap_area_pages((unsigned long) addr, phys_addr, size,
-		cacheflag)) {
+	if (remap_area_pages((unsigned long) addr, phys_addr, size, 0)) {
 		vunmap(addr);
 		return NULL;
 	}
 	return (void __iomem *) (offset + (char *)addr);
 }
-EXPORT_SYMBOL(__ioremap);
+EXPORT_SYMBOL(ioremap);
 
 /*
  * __iounmap unmaps nearly everything, so be careful