[PATCH] Generic ioremap_page_range: alpha conversion

Convert Alpha to use generic ioremap_page_range() by turning
__alpha_remap_area_pages() into an inline wrapper around ioremap_page_range().
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/alpha/kernel/proto.h

 #include <linux/interrupt.h>
+#include <linux/io.h>
 
+#include <asm/pgtable.h>
 
 /* Prototypes of functions used across modules here in this directory.  */
 
@@ -181,9 +183,16 @@ extern void titan_dispatch_irqs(u64, struct pt_regs *);
 extern void switch_to_system_map(void);
 extern void srm_paging_stop(void);
 
-/* ../mm/remap.c */
-extern int __alpha_remap_area_pages(unsigned long, unsigned long, 
-				    unsigned long, unsigned long);
+static inline int
+__alpha_remap_area_pages(unsigned long address, unsigned long phys_addr,
+			 unsigned long size, unsigned long flags)
+{
+	pgprot_t prot;
+
+	prot = __pgprot(_PAGE_VALID | _PAGE_ASM | _PAGE_KRE
+			| _PAGE_KWE | flags);
+	return ioremap_page_range(address, address + size, phys_addr, prot);
+}
 
 /* irq.c */
 

arch/alpha/mm/Makefile

@@ -4,6 +4,6 @@
 
 EXTRA_CFLAGS := -Werror
 
-obj-y	:= init.o fault.o extable.o remap.o
+obj-y	:= init.o fault.o extable.o
 
 obj-$(CONFIG_DISCONTIGMEM) += numa.o

arch/alpha/mm/remap.c

-#include <linux/vmalloc.h>
-#include <asm/pgalloc.h>
-#include <asm/cacheflush.h>
-
-static inline void 
-remap_area_pte(pte_t * pte, unsigned long address, unsigned long size, 
-	       unsigned long phys_addr, unsigned long flags)
-{
-	unsigned long end;
-	unsigned long pfn;
-
-	address &= ~PMD_MASK;
-	end = address + size;
-	if (end > PMD_SIZE)
-		end = PMD_SIZE;
-	if (address >= end)
-		BUG();
-	pfn = phys_addr >> PAGE_SHIFT;
-	do {
-		if (!pte_none(*pte)) {
-			printk("remap_area_pte: page already exists\n");
-			BUG();
-		}
-		set_pte(pte, pfn_pte(pfn, 
-				     __pgprot(_PAGE_VALID | _PAGE_ASM | 
-				              _PAGE_KRE | _PAGE_KWE | flags)));
-		address += PAGE_SIZE;
-		pfn++;
-		pte++;
-	} while (address && (address < end));
-}
-
-static inline int 
-remap_area_pmd(pmd_t * pmd, unsigned long address, unsigned long size, 
-	       unsigned long phys_addr, unsigned long flags)
-{
-	unsigned long end;
-
-	address &= ~PGDIR_MASK;
-	end = address + size;
-	if (end > PGDIR_SIZE)
-		end = PGDIR_SIZE;
-	phys_addr -= address;
-	if (address >= end)
-		BUG();
-	do {
-		pte_t * pte = pte_alloc_kernel(pmd, address);
-		if (!pte)
-			return -ENOMEM;
-		remap_area_pte(pte, address, end - address, 
-				     address + phys_addr, flags);
-		address = (address + PMD_SIZE) & PMD_MASK;
-		pmd++;
-	} while (address && (address < end));
-	return 0;
-}
-
-int
-__alpha_remap_area_pages(unsigned long address, unsigned long phys_addr,
-			 unsigned long size, unsigned long flags)
-{
-	pgd_t * dir;
-	int error = 0;
-	unsigned long end = address + size;
-
-	phys_addr -= address;
-	dir = pgd_offset(&init_mm, address);
-	flush_cache_all();
-	if (address >= end)
-		BUG();
-	do {
-		pmd_t *pmd;
-		pmd = pmd_alloc(&init_mm, dir, address);
-		error = -ENOMEM;
-		if (!pmd)
-			break;
-		if (remap_area_pmd(pmd, address, end - address,
-			           phys_addr + address, flags))
-			break;
-		error = 0;
-		address = (address + PGDIR_SIZE) & PGDIR_MASK;
-		dir++;
-	} while (address && (address < end));
-	return error;
-}
-