[PATCH] hrtimer: convert posix timers completely

- convert posix-timers.c to use hrtimers

- remove the now obsolete abslist code

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Miklos Szeredi <miklos@szeredi.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

3 files changed, 10 insertions, 37 deletions

diff --git a/include/linux/hrtimer.h b/include/linux/hrtimer.h
index 2ac20b48b2f3..cf5cfdf8d613 100644
--- a/include/linux/hrtimer.h
+++ b/include/linux/hrtimer.h
@@ -93,6 +93,13 @@ struct hrtimer_base {
         struct hrtimer          *curr_timer;
 };
 
+/*
+ * clock_was_set() is a NOP for non- high-resolution systems. The
+ * time-sorted order guarantees that a timer does not expire early and
+ * is expired in the next softirq when the clock was advanced.
+ */
+#define clock_was_set()         do { } while (0)
+
 /* Exported timer functions: */
 
 /* Initialize timers: */
diff --git a/include/linux/posix-timers.h b/include/linux/posix-timers.h
index 3c0a5beb7f0d..54faf5236da0 100644
--- a/include/linux/posix-timers.h
+++ b/include/linux/posix-timers.h
@@ -51,12 +51,8 @@ struct k_itimer {
         struct sigqueue *sigq;          /* signal queue entry. */
         union {
                 struct {
-                        struct timer_list timer;
-                        /* clock abs_timer_list: */
-                        struct list_head abs_timer_entry;
-                        /* wall_to_monotonic used when set: */
-                        struct timespec wall_to_prev;
-                        unsigned long incr; /* interval in jiffies */
+                        struct hrtimer timer;
+                        ktime_t interval;
                 } real;
                 struct cpu_timer_list cpu;
                 struct {
@@ -68,15 +64,9 @@ struct k_itimer {
         } it;
 };
 
-struct k_clock_abs {
-        struct list_head list;
-        spinlock_t lock;
-};
-
 struct k_clock {
         int res;                /* in nanoseconds */
         int (*clock_getres) (const clockid_t which_clock, struct timespec *tp);
-        struct k_clock_abs *abs_struct;
         int (*clock_set) (const clockid_t which_clock, struct timespec * tp);
         int (*clock_get) (const clockid_t which_clock, struct timespec * tp);
         int (*timer_create) (struct k_itimer *timer);
@@ -102,29 +92,6 @@ int do_posix_clock_nosettime(const clockid_t, struct timespec *tp);
 /* function to call to trigger timer event */
 int posix_timer_event(struct k_itimer *timr, int si_private);
 
-struct now_struct {
-        unsigned long jiffies;
-};
-
-#define posix_get_now(now) \
-        do { (now)->jiffies = jiffies; } while (0)
-
-#define posix_time_before(timer, now) \
-                      time_before((timer)->expires, (now)->jiffies)
-
-#define posix_bump_timer(timr, now)                                     \
-        do {                                                            \
-                long delta, orun;                                       \
-                                                                        \
-                delta = (now).jiffies - (timr)->it.real.timer.expires;  \
-                if (delta >= 0) {                                       \
-                        orun = 1 + (delta / (timr)->it.real.incr);      \
-                        (timr)->it.real.timer.expires +=                \
-                                orun * (timr)->it.real.incr;            \
-                        (timr)->it_overrun += orun;                     \
-                }                                                       \
-        } while (0)
-
 int posix_cpu_clock_getres(const clockid_t which_clock, struct timespec *ts);
 int posix_cpu_clock_get(const clockid_t which_clock, struct timespec *ts);
 int posix_cpu_clock_set(const clockid_t which_clock, const struct timespec *ts);
diff --git a/include/linux/time.h b/include/linux/time.h
index f639fde29253..1201155b2202 100644
--- a/include/linux/time.h
+++ b/include/linux/time.h
@@ -73,8 +73,7 @@ struct timespec current_kernel_time(void);
 extern void do_gettimeofday(struct timeval *tv);
 extern int do_settimeofday(struct timespec *tv);
 extern int do_sys_settimeofday(struct timespec *tv, struct timezone *tz);
-extern void clock_was_set(void); // call whenever the clock is set
-extern int do_posix_clock_monotonic_gettime(struct timespec *tp);
+#define do_posix_clock_monotonic_gettime(ts) ktime_get_ts(ts)
 extern long do_utimes(char __user *filename, struct timeval *times);
 struct itimerval;
 extern int do_setitimer(int which, struct itimerval *value,