1 files changed, 35 insertions, 14 deletions

diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index 0aa8b7d5b21..c61481577ae 100644
--- a/arch/arm/mm/mmu.c
+++ b/arch/arm/mm/mmu.c
@@ -15,6 +15,7 @@
 #include <linux/nodemask.h>
 #include <linux/memblock.h>
 #include <linux/fs.h>
+#include <linux/vmalloc.h>
 
 #include <asm/cputype.h>
 #include <asm/sections.h>
@@ -529,13 +530,18 @@ EXPORT_SYMBOL(phys_mem_access_prot);
 
 #define vectors_base()  (vectors_high() ? 0xffff0000 : 0)
 
-static void __init *early_alloc(unsigned long sz)
+static void __init *early_alloc_aligned(unsigned long sz, unsigned long align)
 {
-        void *ptr = __va(memblock_alloc(sz, sz));
+        void *ptr = __va(memblock_alloc(sz, align));
         memset(ptr, 0, sz);
         return ptr;
 }
 
+static void __init *early_alloc(unsigned long sz)
+{
+        return early_alloc_aligned(sz, sz);
+}
+
 static pte_t * __init early_pte_alloc(pmd_t *pmd, unsigned long addr, unsigned long prot)
 {
         if (pmd_none(*pmd)) {
@@ -685,9 +691,10 @@ static void __init create_mapping(struct map_desc *md)
         }
 
         if ((md->type == MT_DEVICE || md->type == MT_ROM) &&
-            md->virtual >= PAGE_OFFSET && md->virtual < VMALLOC_END) {
+            md->virtual >= PAGE_OFFSET &&
+            (md->virtual < VMALLOC_START || md->virtual >= VMALLOC_END)) {
                 printk(KERN_WARNING "BUG: mapping for 0x%08llx"
-                       " at 0x%08lx overlaps vmalloc space\n",
+                       " at 0x%08lx out of vmalloc space\n",
                        (long long)__pfn_to_phys((u64)md->pfn), md->virtual);
         }
 
@@ -729,18 +736,32 @@ static void __init create_mapping(struct map_desc *md)
  */
 void __init iotable_init(struct map_desc *io_desc, int nr)
 {
-        int i;
+        struct map_desc *md;
+        struct vm_struct *vm;
+
+        if (!nr)
+                return;
 
-        for (i = 0; i < nr; i++)
-                create_mapping(io_desc + i);
+        vm = early_alloc_aligned(sizeof(*vm) * nr, __alignof__(*vm));
+
+        for (md = io_desc; nr; md++, nr--) {
+                create_mapping(md);
+                vm->addr = (void *)(md->virtual & PAGE_MASK);
+                vm->size = PAGE_ALIGN(md->length + (md->virtual & ~PAGE_MASK));
+                vm->phys_addr = __pfn_to_phys(md->pfn); 
+                vm->flags = VM_IOREMAP;
+                vm->caller = iotable_init;
+                vm_area_add_early(vm++);
+        }
 }
 
-static void * __initdata vmalloc_min = (void *)(VMALLOC_END - SZ_128M);
+static void * __initdata vmalloc_min =
+        (void *)(VMALLOC_END - (240 << 20) - VMALLOC_OFFSET);
 
 /*
  * vmalloc=size forces the vmalloc area to be exactly 'size'
  * bytes. This can be used to increase (or decrease) the vmalloc
- * area - the default is 128m.
+ * area - the default is 240m.
  */
 static int __init early_vmalloc(char *arg)
 {
@@ -891,10 +912,10 @@ static inline void prepare_page_table(void)
 
         /*
          * Clear out all the kernel space mappings, except for the first
-         * memory bank, up to the end of the vmalloc region.
+         * memory bank, up to the vmalloc region.
          */
         for (addr = __phys_to_virt(end);
-             addr < VMALLOC_END; addr += PMD_SIZE)
+             addr < VMALLOC_START; addr += PMD_SIZE)
                 pmd_clear(pmd_off_k(addr));
 }
 
@@ -921,8 +942,8 @@ void __init arm_mm_memblock_reserve(void)
 }
 
 /*
- * Set up device the mappings.  Since we clear out the page tables for all
- * mappings above VMALLOC_END, we will remove any debug device mappings.
+ * Set up the device mappings.  Since we clear out the page tables for all
+ * mappings above VMALLOC_START, we will remove any debug device mappings.
  * This means you have to be careful how you debug this function, or any
  * called function.  This means you can't use any function or debugging
  * method which may touch any device, otherwise the kernel _will_ crash.
@@ -937,7 +958,7 @@ static void __init devicemaps_init(struct machine_desc *mdesc)
          */
         vectors_page = early_alloc(PAGE_SIZE);
 
-        for (addr = VMALLOC_END; addr; addr += PMD_SIZE)
+        for (addr = VMALLOC_START; addr; addr += PMD_SIZE)
                 pmd_clear(pmd_off_k(addr));
 
         /*