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authorHector Palacios <hector.palacios@digi.com>2011-11-14 11:15:25 +0100
committerGreg Kroah-Hartman <gregkh@suse.de>2011-12-09 08:52:28 -0800
commite1ef77bdad527601e9e47b377cbef5bee9df8248 (patch)
tree384280ecb7c3c04ddb0e1083a462a73783b4dd06 /kernel
parent953d0c888eda75de7d248017f6dd2e5e254ad0cc (diff)
timekeeping: add arch_offset hook to ktime_get functions
commit d004e024058a0eaca097513ce62cbcf978913e0a upstream. ktime_get and ktime_get_ts were calling timekeeping_get_ns() but later they were not calling arch_gettimeoffset() so architectures using this mechanism returned 0 ns when calling these functions. This happened for example when running Busybox's ping which calls syscall(__NR_clock_gettime, CLOCK_MONOTONIC, ts) which eventually calls ktime_get. As a result the returned ping travel time was zero. Signed-off-by: Hector Palacios <hector.palacios@digi.com> Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/time/timekeeping.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index 342408cf68dd..5f458310668a 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -249,6 +249,8 @@ ktime_t ktime_get(void)
secs = xtime.tv_sec + wall_to_monotonic.tv_sec;
nsecs = xtime.tv_nsec + wall_to_monotonic.tv_nsec;
nsecs += timekeeping_get_ns();
+ /* If arch requires, add in gettimeoffset() */
+ nsecs += arch_gettimeoffset();
} while (read_seqretry(&xtime_lock, seq));
/*
@@ -280,6 +282,8 @@ void ktime_get_ts(struct timespec *ts)
*ts = xtime;
tomono = wall_to_monotonic;
nsecs = timekeeping_get_ns();
+ /* If arch requires, add in gettimeoffset() */
+ nsecs += arch_gettimeoffset();
} while (read_seqretry(&xtime_lock, seq));