select: add a timespec_add_safe() function

[linux-2.6-omap-h63xx.git] / include / linux / time.h

diff --git a/include/linux/time.h b/include/linux/time.h
index e15206a7e82ec9278b25fc062585302f9ed71687..726976478480a644c13a75ebf8f048e44a38ef98 100644 (file)
--- a/include/linux/time.h
+++ b/include/linux/time.h
@@ -38,6 +38,8 @@ struct timezone {
 #define NSEC_PER_SEC   1000000000L
 #define FSEC_PER_SEC   1000000000000000L
 
+#define TIME_T_MAX     (time_t)((1UL << ((sizeof(time_t) << 3) - 1)) - 1)
+
 static inline int timespec_equal(const struct timespec *a,
                                  const struct timespec *b)
 {
@@ -72,6 +74,8 @@ extern unsigned long mktime(const unsigned int year, const unsigned int mon,
                            const unsigned int min, const unsigned int sec);
 
 extern void set_normalized_timespec(struct timespec *ts, time_t sec, long nsec);
+extern struct timespec timespec_add_safe(const struct timespec lhs,
+                                        const struct timespec rhs);
 
 /*
  * sub = lhs - rhs, in normalized form