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authorTorben Hohn <torbenh@gmx.de>2011-01-27 15:59:05 +0100
committerThomas Gleixner <tglx@linutronix.de>2011-01-31 14:55:42 +0100
commit48cf76f7104f655bbd48a75c7759dce82c3e1ab6 (patch)
tree2b3cf138fd277ba9c551d75ccbe575a40974560a /kernel/time
parentfbad1ea94159a71bc0f68b00e57ae803606af9fb (diff)
time: Provide get_xtime_and_monotonic_offset()
The hrtimer code accesses timekeeping variables under xtime_lock. Provide a sensible accessor function and use it. [ tglx: Removed the conditionals, unused variable, fixed codingstyle and massaged changelog ] Signed-off-by: Torben Hohn <torbenh@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: johnstul@us.ibm.com Cc: yong.zhang0@gmail.com Cc: hch@infradead.org LKML-Reference: <20110127145905.23248.30458.stgit@localhost> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/time')
-rw-r--r--kernel/time/timekeeping.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index c1a178ca0f5..c50aaf6cd01 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -958,3 +958,19 @@ void do_timer(unsigned long ticks)
update_wall_time();
calc_global_load(ticks);
}
+
+/**
+ * get_xtime_and_monotonic_offset() - get xtime and wall_to_monotonic
+ * @xtim: pointer to timespec to be set with xtime
+ * @wtom: pointer to timespec to be set with wall_to_monotonic
+ */
+void get_xtime_and_monotonic_offset(struct timespec *xtim, struct timespec *wtom)
+{
+ unsigned long seq;
+
+ do {
+ seq = read_seqbegin(&xtime_lock);
+ *xtim = xtime;
+ *wtom = wall_to_monotonic;
+ } while (read_seqretry(&xtime_lock, seq));
+}