[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>

3 files changed, 13 insertions, 90 deletions

diff --git a/arch/alpha/kernel/proto.h b/arch/alpha/kernel/proto.h
index 2a6e3da8144f..21f71287b6f5 100644
--- a/arch/alpha/kernel/proto.h
+++ b/arch/alpha/kernel/proto.h
@@ -1,5 +1,7 @@
 #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 */
 
diff --git a/arch/alpha/mm/Makefile b/arch/alpha/mm/Makefile
index 6edd9a09ea4f..09399c5386cb 100644
--- a/arch/alpha/mm/Makefile
+++ b/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
diff --git a/arch/alpha/mm/remap.c b/arch/alpha/mm/remap.c
deleted file mode 100644
index a78356c3ead5..000000000000
--- a/arch/alpha/mm/remap.c
+++ /dev/null
@@ -1,86 +0,0 @@
-#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;
-}
-