1 files changed, 25 insertions, 3 deletions

diff --git a/include/linux/sunrpc/cache.h b/include/linux/sunrpc/cache.h
index 0e1febf4e5bc..ece432b7f87f 100644
--- a/include/linux/sunrpc/cache.h
+++ b/include/linux/sunrpc/cache.h
@@ -218,20 +218,42 @@ static inline int get_int(char **bpp, int *anint)
         return 0;
 }
 
+/*
+ * timestamps kept in the cache are expressed in seconds
+ * since boot.  This is the best for measuring differences in
+ * real time.
+ */
+static inline time_t seconds_since_boot(void)
+{
+        struct timespec boot;
+        getboottime(&boot);
+        return get_seconds() - boot.tv_sec;
+}
+
+static inline time_t convert_to_wallclock(time_t sinceboot)
+{
+        struct timespec boot;
+        getboottime(&boot);
+        return boot.tv_sec + sinceboot;
+}
+
 static inline time_t get_expiry(char **bpp)
 {
         int rv;
+        struct timespec boot;
+
         if (get_int(bpp, &rv))
                 return 0;
         if (rv < 0)
                 return 0;
-        return rv;
+        getboottime(&boot);
+        return rv - boot.tv_sec;
 }
 
 static inline void sunrpc_invalidate(struct cache_head *h,
                                      struct cache_detail *detail)
 {
-        h->expiry_time = get_seconds() - 1;
-        detail->nextcheck = get_seconds();
+        h->expiry_time = seconds_since_boot() - 1;
+        detail->nextcheck = seconds_since_boot();
 }
 #endif /*  _LINUX_SUNRPC_CACHE_H_ */