1 files changed, 9 insertions, 3 deletions

diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index d140e8fb075f..80d36874689b 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -77,13 +77,15 @@
 
 /*
  * Divide positive or negative dividend by positive divisor and round
- * to closest integer. Result is undefined for negative divisors.
+ * to closest integer. Result is undefined for negative divisors and
+ * for negative dividends if the divisor variable type is unsigned.
  */
 #define DIV_ROUND_CLOSEST(x, divisor)(                  \
 {                                                       \
         typeof(x) __x = x;                              \
         typeof(divisor) __d = divisor;                  \
-        (((typeof(x))-1) > 0 || (__x) > 0) ?            \
+        (((typeof(x))-1) > 0 ||                         \
+         ((typeof(divisor))-1) > 0 || (__x) > 0) ?      \
                 (((__x) + ((__d) / 2)) / (__d)) :       \
                 (((__x) - ((__d) / 2)) / (__d));        \
 }                                                       \
@@ -396,7 +398,11 @@ extern int panic_on_unrecovered_nmi;
 extern int panic_on_io_nmi;
 extern int sysctl_panic_on_stackoverflow;
 extern const char *print_tainted(void);
-extern void add_taint(unsigned flag);
+enum lockdep_ok {
+        LOCKDEP_STILL_OK,
+        LOCKDEP_NOW_UNRELIABLE
+};
+extern void add_taint(unsigned flag, enum lockdep_ok);
 extern int test_taint(unsigned flag);
 extern unsigned long get_taint(void);
 extern int root_mountflags;