ARM: use generic ioremap_page_range()

We don't need our own implementation of this, use the generic
library implementation instead.

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

1 files changed, 4 insertions, 70 deletions

diff --git a/arch/arm/mm/ioremap.c b/arch/arm/mm/ioremap.c
index 03f11935ed08..ab506272b2d3 100644
--- a/arch/arm/mm/ioremap.c
+++ b/arch/arm/mm/ioremap.c
@@ -42,78 +42,11 @@
  */
 #define VM_ARM_SECTION_MAPPING  0x80000000
 
-static int remap_area_pte(pmd_t *pmd, unsigned long addr, unsigned long end,
-                          unsigned long phys_addr, const struct mem_type *type)
-{
-        pgprot_t prot = __pgprot(type->prot_pte);
-        pte_t *pte;
-
-        pte = pte_alloc_kernel(pmd, addr);
-        if (!pte)
-                return -ENOMEM;
-
-        do {
-                if (!pte_none(*pte))
-                        goto bad;
-
-                set_pte_ext(pte, pfn_pte(phys_addr >> PAGE_SHIFT, prot), 0);
-                phys_addr += PAGE_SIZE;
-        } while (pte++, addr += PAGE_SIZE, addr != end);
-        return 0;
-
- bad:
-        printk(KERN_CRIT "remap_area_pte: page already exists\n");
-        BUG();
-}
-
-static inline int remap_area_pmd(pgd_t *pgd, unsigned long addr,
-                                 unsigned long end, unsigned long phys_addr,
-                                 const struct mem_type *type)
-{
-        unsigned long next;
-        pmd_t *pmd;
-        int ret = 0;
-
-        pmd = pmd_alloc(&init_mm, pgd, addr);
-        if (!pmd)
-                return -ENOMEM;
-
-        do {
-                next = pmd_addr_end(addr, end);
-                ret = remap_area_pte(pmd, addr, next, phys_addr, type);
-                if (ret)
-                        return ret;
-                phys_addr += next - addr;
-        } while (pmd++, addr = next, addr != end);
-        return ret;
-}
-
-static int remap_area_pages(unsigned long start, unsigned long pfn,
-                            size_t size, const struct mem_type *type)
-{
-        unsigned long addr = start;
-        unsigned long next, end = start + size;
-        unsigned long phys_addr = __pfn_to_phys(pfn);
-        pgd_t *pgd;
-        int err = 0;
-
-        BUG_ON(addr >= end);
-        pgd = pgd_offset_k(addr);
-        do {
-                next = pgd_addr_end(addr, end);
-                err = remap_area_pmd(pgd, addr, next, phys_addr, type);
-                if (err)
-                        break;
-                phys_addr += next - addr;
-        } while (pgd++, addr = next, addr != end);
-
-        return err;
-}
-
 int ioremap_page(unsigned long virt, unsigned long phys,
                  const struct mem_type *mtype)
 {
-        return remap_area_pages(virt, __phys_to_pfn(phys), PAGE_SIZE, mtype);
+        return ioremap_page_range(virt, virt + PAGE_SIZE, phys,
+                                  __pgprot(mtype->prot_pte));
 }
 EXPORT_SYMBOL(ioremap_page);
 
@@ -300,7 +233,8 @@ void __iomem * __arm_ioremap_pfn_caller(unsigned long pfn,
                 err = remap_area_sections(addr, pfn, size, type);
         } else
 #endif
-                err = remap_area_pages(addr, pfn, size, type);
+                err = ioremap_page_range(addr, addr + size, __pfn_to_phys(pfn),
+                                         __pgprot(type->prot_pte));
 
         if (err) {
                 vunmap((void *)addr);