1 files changed, 19 insertions, 62 deletions

diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c
index 2feb9bdedaaf..12e4d2d3c110 100644
--- a/arch/x86/mm/ioremap.c
+++ b/arch/x86/mm/ioremap.c
@@ -24,43 +24,6 @@
 
 #include "physaddr.h"
 
-int page_is_ram(unsigned long pagenr)
-{
-        resource_size_t addr, end;
-        int i;
-
-        /*
-         * A special case is the first 4Kb of memory;
-         * This is a BIOS owned area, not kernel ram, but generally
-         * not listed as such in the E820 table.
-         */
-        if (pagenr == 0)
-                return 0;
-
-        /*
-         * Second special case: Some BIOSen report the PC BIOS
-         * area (640->1Mb) as ram even though it is not.
-         */
-        if (pagenr >= (BIOS_BEGIN >> PAGE_SHIFT) &&
-                    pagenr < (BIOS_END >> PAGE_SHIFT))
-                return 0;
-
-        for (i = 0; i < e820.nr_map; i++) {
-                /*
-                 * Not usable memory:
-                 */
-                if (e820.map[i].type != E820_RAM)
-                        continue;
-                addr = (e820.map[i].addr + PAGE_SIZE-1) >> PAGE_SHIFT;
-                end = (e820.map[i].addr + e820.map[i].size) >> PAGE_SHIFT;
-
-
-                if ((pagenr >= addr) && (pagenr < end))
-                        return 1;
-        }
-        return 0;
-}
-
 /*
  * Fix up the linear direct mapping of the kernel to avoid cache attribute
  * conflicts.
@@ -281,30 +244,6 @@ void __iomem *ioremap_cache(resource_size_t phys_addr, unsigned long size)
 }
 EXPORT_SYMBOL(ioremap_cache);
 
-static void __iomem *ioremap_default(resource_size_t phys_addr,
-                                        unsigned long size)
-{
-        unsigned long flags;
-        void __iomem *ret;
-        int err;
-
-        /*
-         * - WB for WB-able memory and no other conflicting mappings
-         * - UC_MINUS for non-WB-able memory with no other conflicting mappings
-         * - Inherit from confliting mappings otherwise
-         */
-        err = reserve_memtype(phys_addr, phys_addr + size,
-                                _PAGE_CACHE_WB, &flags);
-        if (err < 0)
-                return NULL;
-
-        ret = __ioremap_caller(phys_addr, size, flags,
-                               __builtin_return_address(0));
-
-        free_memtype(phys_addr, phys_addr + size);
-        return ret;
-}
-
 void __iomem *ioremap_prot(resource_size_t phys_addr, unsigned long size,
                                 unsigned long prot_val)
 {
@@ -380,7 +319,7 @@ void *xlate_dev_mem_ptr(unsigned long phys)
         if (page_is_ram(start >> PAGE_SHIFT))
                 return __va(phys);
 
-        addr = (void __force *)ioremap_default(start, PAGE_SIZE);
+        addr = (void __force *)ioremap_cache(start, PAGE_SIZE);
         if (addr)
                 addr = (void *)((unsigned long)addr | (phys & ~PAGE_MASK));
 
@@ -446,6 +385,10 @@ void __init early_ioremap_init(void)
          * The boot-ioremap range spans multiple pmds, for which
          * we are not prepared:
          */
+#define __FIXADDR_TOP (-PAGE_SIZE)
+        BUILD_BUG_ON((__fix_to_virt(FIX_BTMAP_BEGIN) >> PMD_SHIFT)
+                     != (__fix_to_virt(FIX_BTMAP_END) >> PMD_SHIFT));
+#undef __FIXADDR_TOP
         if (pmd != early_ioremap_pmd(fix_to_virt(FIX_BTMAP_END))) {
                 WARN_ON(1);
                 printk(KERN_WARNING "pmd %p != %p\n",
@@ -505,6 +448,20 @@ static inline void __init early_clear_fixmap(enum fixed_addresses idx)
 static void __iomem *prev_map[FIX_BTMAPS_SLOTS] __initdata;
 static unsigned long prev_size[FIX_BTMAPS_SLOTS] __initdata;
 
+void __init fixup_early_ioremap(void)
+{
+        int i;
+
+        for (i = 0; i < FIX_BTMAPS_SLOTS; i++) {
+                if (prev_map[i]) {
+                        WARN_ON(1);
+                        break;
+                }
+        }
+
+        early_ioremap_init();
+}
+
 static int __init check_early_ioremap_leak(void)
 {
         int count = 0;