diff --git a/arch/um/Makefile b/arch/um/Makefile
index e1ffad2..e55d32e 100644
--- a/arch/um/Makefile
+++ b/arch/um/Makefile
@@ -60,7 +60,7 @@
 
 USER_CFLAGS := $(patsubst -I%,,$(CFLAGS))
 USER_CFLAGS := $(patsubst -D__KERNEL__,,$(USER_CFLAGS)) $(ARCH_INCLUDE) \
-	$(MODE_INCLUDE)
+	$(MODE_INCLUDE) -D_FILE_OFFSET_BITS=64
 
 # -Derrno=kernel_errno - This turns all kernel references to errno into
 # kernel_errno to separate them from the libc errno.  This allows -fno-common
diff --git a/arch/um/include/mem_user.h b/arch/um/include/mem_user.h
index 9fef412..a1064c5 100644
--- a/arch/um/include/mem_user.h
+++ b/arch/um/include/mem_user.h
@@ -57,7 +57,7 @@
 		     unsigned long highmem);
 extern unsigned long get_vm(unsigned long len);
 extern void setup_physmem(unsigned long start, unsigned long usable,
-			  unsigned long len, unsigned long highmem);
+			  unsigned long len, unsigned long long highmem);
 extern void add_iomem(char *name, int fd, unsigned long size);
 extern unsigned long phys_offset(unsigned long phys);
 extern void unmap_physmem(void);
diff --git a/arch/um/include/os.h b/arch/um/include/os.h
index 112d728..2cccfa5 100644
--- a/arch/um/include/os.h
+++ b/arch/um/include/os.h
@@ -167,7 +167,7 @@
 #endif
 
 /* mem.c */
-extern int create_mem_file(unsigned long len);
+extern int create_mem_file(unsigned long long len);
 
 /* process.c */
 extern unsigned long os_process_pc(int pid);
diff --git a/arch/um/kernel/physmem.c b/arch/um/kernel/physmem.c
index ea670fc..f3b583a 100644
--- a/arch/um/kernel/physmem.c
+++ b/arch/um/kernel/physmem.c
@@ -246,7 +246,7 @@
 /* Changed during early boot */
 unsigned long high_physmem;
 
-extern unsigned long physmem_size;
+extern unsigned long long physmem_size;
 
 int init_maps(unsigned long physmem, unsigned long iomem, unsigned long highmem)
 {
@@ -321,7 +321,7 @@
 extern int __syscall_stub_start, __binary_start;
 
 void setup_physmem(unsigned long start, unsigned long reserve_end,
-		   unsigned long len, unsigned long highmem)
+		   unsigned long len, unsigned long long highmem)
 {
 	unsigned long reserve = reserve_end - start;
 	int pfn = PFN_UP(__pa(reserve_end));
diff --git a/arch/um/kernel/um_arch.c b/arch/um/kernel/um_arch.c
index 93dc782..142a949 100644
--- a/arch/um/kernel/um_arch.c
+++ b/arch/um/kernel/um_arch.c
@@ -137,7 +137,7 @@
 
 /* Set in early boot */
 static int have_root __initdata = 0;
-long physmem_size = 32 * 1024 * 1024;
+long long physmem_size = 32 * 1024 * 1024;
 
 void set_cmdline(char *cmd)
 {
@@ -402,7 +402,7 @@
 #ifndef CONFIG_HIGHMEM
 		highmem = 0;
 		printf("CONFIG_HIGHMEM not enabled - physical memory shrunk "
-		       "to %ld bytes\n", physmem_size);
+		       "to %lu bytes\n", physmem_size);
 #endif
 	}
 
@@ -414,8 +414,8 @@
 
 	setup_physmem(uml_physmem, uml_reserved, physmem_size, highmem);
 	if(init_maps(physmem_size, iomem_size, highmem)){
-		printf("Failed to allocate mem_map for %ld bytes of physical "
-		       "memory and %ld bytes of highmem\n", physmem_size,
+		printf("Failed to allocate mem_map for %lu bytes of physical "
+		       "memory and %lu bytes of highmem\n", physmem_size,
 		       highmem);
 		exit(1);
 	}
@@ -426,7 +426,7 @@
 	end_vm = start_vm + virtmem_size;
 
 	if(virtmem_size < physmem_size)
-		printf("Kernel virtual memory size shrunk to %ld bytes\n",
+		printf("Kernel virtual memory size shrunk to %lu bytes\n",
 		       virtmem_size);
 
   	uml_postsetup();
diff --git a/arch/um/os-Linux/mem.c b/arch/um/os-Linux/mem.c
index 8e71eda..9d7d69a 100644
--- a/arch/um/os-Linux/mem.c
+++ b/arch/um/os-Linux/mem.c
@@ -88,7 +88,7 @@
  * This proc is used in start_up.c
  * So it isn't 'static'.
  */
-int create_tmp_file(unsigned long len)
+int create_tmp_file(unsigned long long len)
 {
 	int fd, err;
 	char zero;
@@ -121,7 +121,7 @@
 	return(fd);
 }
 
-static int create_anon_file(unsigned long len)
+static int create_anon_file(unsigned long long len)
 {
 	void *addr;
 	int fd;
@@ -144,7 +144,7 @@
 
 extern int have_devanon;
 
-int create_mem_file(unsigned long len)
+int create_mem_file(unsigned long long len)
 {
 	int err, fd;
 
diff --git a/arch/um/os-Linux/start_up.c b/arch/um/os-Linux/start_up.c
index 553a09c..37517d4 100644
--- a/arch/um/os-Linux/start_up.c
+++ b/arch/um/os-Linux/start_up.c
@@ -296,7 +296,7 @@
 	check_sysemu();
 }
 
-extern int create_tmp_file(unsigned long len);
+extern int create_tmp_file(unsigned long long len);
 
 static void check_tmpexec(void)
 {