2 files changed, 6 insertions, 11 deletions

diff --git a/drivers/acpi/acpi_memhotplug.c b/drivers/acpi/acpi_memhotplug.c
index d882bf87fa96..e0a95ba72371 100644
--- a/drivers/acpi/acpi_memhotplug.c
+++ b/drivers/acpi/acpi_memhotplug.c
@@ -74,7 +74,7 @@ struct acpi_memory_device {
         unsigned short caching; /* memory cache attribute */
         unsigned short write_protect;   /* memory read/write attribute */
         u64 start_addr;         /* Memory Range start physical addr */
-        u64 end_addr;           /* Memory Range end physical addr */
+        u64 length;             /* Memory Range length */
 };
 
 static int
@@ -97,12 +97,11 @@ acpi_memory_get_device_resources(struct acpi_memory_device *mem_device)
         if (ACPI_SUCCESS(status)) {
                 if (address64.resource_type == ACPI_MEMORY_RANGE) {
                         /* Populate the structure */
-                        mem_device->caching =
-                            address64.info.mem.caching;
+                        mem_device->caching = address64.info.mem.caching;
                         mem_device->write_protect =
                             address64.info.mem.write_protect;
                         mem_device->start_addr = address64.minimum;
-                        mem_device->end_addr = address64.maximum;
+                        mem_device->length = address64.address_length;
                 }
         }
 
@@ -199,8 +198,7 @@ static int acpi_memory_enable_device(struct acpi_memory_device *mem_device)
          * Tell the VM there is more memory here...
          * Note: Assume that this function returns zero on success
          */
-        result = add_memory(mem_device->start_addr,
-                            (mem_device->end_addr - mem_device->start_addr) + 1);
+        result = add_memory(mem_device->start_addr, mem_device->length);
         if (result) {
                 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "\nadd_memory failed\n"));
                 mem_device->state = MEMORY_INVALID_STATE;
@@ -249,7 +247,7 @@ static int acpi_memory_disable_device(struct acpi_memory_device *mem_device)
 {
         int result;
         u64 start = mem_device->start_addr;
-        u64 len = mem_device->end_addr - start + 1;
+        u64 len = mem_device->length;
 
         ACPI_FUNCTION_TRACE("acpi_memory_disable_device");
 
diff --git a/drivers/char/hpet.c b/drivers/char/hpet.c
index ef140ebde117..07473cd84121 100644
--- a/drivers/char/hpet.c
+++ b/drivers/char/hpet.c
@@ -925,11 +925,8 @@ static acpi_status hpet_resources(struct acpi_resource *res, void *data)
         status = acpi_resource_to_address64(res, &addr);
 
         if (ACPI_SUCCESS(status)) {
-                unsigned long size;
-
-                size = addr.maximum - addr.minimum + 1;
                 hdp->hd_phys_address = addr.minimum;
-                hdp->hd_address = ioremap(addr.minimum, size);
+                hdp->hd_address = ioremap(addr.minimum, addr.address_length);
 
                 if (hpet_is_known(hdp)) {
                         printk(KERN_DEBUG "%s: 0x%lx is busy\n",