Rearrange io_mem_init()

Move io_mem_init() downwards to avoid a forward declaration.  No code change.
Signed-off-by: NAvi Kivity <avi@redhat.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

exec.c

@@ -3029,32 +3029,6 @@ static int get_free_io_mem_idx(void)
     return -1;
 }
 
-static int cpu_register_io_memory_fixed(int io_index,
-                                        CPUReadMemoryFunc **mem_read,
-                                        CPUWriteMemoryFunc **mem_write,
-                                        void *opaque);
-
-static void io_mem_init(void)
-{
-    int i;
-
-    cpu_register_io_memory_fixed(IO_MEM_ROM, error_mem_read, unassigned_mem_write, NULL);
-    cpu_register_io_memory_fixed(IO_MEM_UNASSIGNED, unassigned_mem_read, unassigned_mem_write, NULL);
-    cpu_register_io_memory_fixed(IO_MEM_NOTDIRTY, error_mem_read, notdirty_mem_write, NULL);
-    for (i=0; i<5; i++)
-        io_mem_used[i] = 1;
-
-    io_mem_watch = cpu_register_io_memory(watch_mem_read,
-                                          watch_mem_write, NULL);
-#ifdef CONFIG_KQEMU
-    if (kqemu_phys_ram_base) {
-        /* alloc dirty bits array */
-        phys_ram_dirty = qemu_vmalloc(kqemu_phys_ram_size >> TARGET_PAGE_BITS);
-        memset(phys_ram_dirty, 0xff, kqemu_phys_ram_size >> TARGET_PAGE_BITS);
-    }
-#endif
-}
-
 /* mem_read and mem_write are arrays of functions containing the
    function to access byte (index 0), word (index 1) and dword (index
    2). Functions can be omitted with a NULL function pointer.
@@ -3109,6 +3083,27 @@ void cpu_unregister_io_memory(int io_table_address)
     io_mem_used[io_index] = 0;
 }
 
+static void io_mem_init(void)
+{
+    int i;
+
+    cpu_register_io_memory_fixed(IO_MEM_ROM, error_mem_read, unassigned_mem_write, NULL);
+    cpu_register_io_memory_fixed(IO_MEM_UNASSIGNED, unassigned_mem_read, unassigned_mem_write, NULL);
+    cpu_register_io_memory_fixed(IO_MEM_NOTDIRTY, error_mem_read, notdirty_mem_write, NULL);
+    for (i=0; i<5; i++)
+        io_mem_used[i] = 1;
+
+    io_mem_watch = cpu_register_io_memory(watch_mem_read,
+                                          watch_mem_write, NULL);
+#ifdef CONFIG_KQEMU
+    if (kqemu_phys_ram_base) {
+        /* alloc dirty bits array */
+        phys_ram_dirty = qemu_vmalloc(kqemu_phys_ram_size >> TARGET_PAGE_BITS);
+        memset(phys_ram_dirty, 0xff, kqemu_phys_ram_size >> TARGET_PAGE_BITS);
+    }
+#endif
+}
+
 #endif /* !defined(CONFIG_USER_ONLY) */
 
 /* physical memory access (slow version, mainly for debug) */