timers: Introduce the concept of timer slack for legacy timers

[safe/jmp/linux-2.6] / include / linux / timer.h

diff --git a/include/linux/timer.h b/include/linux/timer.h
index a2d1eb6..ea965b8 100644 (file)
--- a/include/linux/timer.h
+++ b/include/linux/timer.h
@@ -10,13 +10,19 @@
 struct tvec_base;
 
 struct timer_list {
+       /*
+        * All fields that change during normal runtime grouped to the
+        * same cacheline
+        */
        struct list_head entry;
        unsigned long expires;
+       struct tvec_base *base;
 
        void (*function)(unsigned long);
        unsigned long data;
 
-       struct tvec_base *base;
+       int slack;
+
 #ifdef CONFIG_TIMER_STATS
        void *start_site;
        char start_comm[16];
@@ -165,6 +171,8 @@ extern int mod_timer(struct timer_list *timer, unsigned long expires);
 extern int mod_timer_pending(struct timer_list *timer, unsigned long expires);
 extern int mod_timer_pinned(struct timer_list *timer, unsigned long expires);
 
+extern void set_timer_slack(struct timer_list *time, int slack_hz);
+
 #define TIMER_NOT_PINNED       0
 #define TIMER_PINNED           1
 /*