1 files changed, 4 insertions, 4 deletions

diff --git a/drivers/acpi/tables/tbutils.c b/drivers/acpi/tables/tbutils.c
index e6dfe688b76b..9d0bf536d674 100644
--- a/drivers/acpi/tables/tbutils.c
+++ b/drivers/acpi/tables/tbutils.c
@@ -240,16 +240,16 @@ acpi_tb_verify_table_checksum(struct acpi_table_header * table_header)
 
 u8 acpi_tb_generate_checksum(void *buffer, u32 length)
 {
-        const u8 *limit;
-        const u8 *rover;
+        u8 *end_buffer;
+        u8 *rover;
         u8 sum = 0;
 
         if (buffer && length) {
                 /*  Buffer and Length are valid   */
 
-                limit = (u8 *) buffer + length;
+                end_buffer = ACPI_ADD_PTR(u8, buffer, length);
 
-                for (rover = buffer; rover < limit; rover++) {
+                for (rover = buffer; rover < end_buffer; rover++) {
                         sum = (u8) (sum + *rover);
                 }
         }