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authorDengChao <chao.deng@linaro.org>2015-12-13 12:24:18 +0800
committerJohn Stultz <john.stultz@linaro.org>2015-12-16 16:50:55 -0800
commitdee3665416a8553279d10b62b5e62685cbe5daa8 (patch)
treedd4a6644f7b8e70467772438d82af56f1ee06c49
parent37cf4dc3370fbca0344e23bb96446eb2c3548ba7 (diff)
downloadop-kernel-dev-dee3665416a8553279d10b62b5e62685cbe5daa8.zip
op-kernel-dev-dee3665416a8553279d10b62b5e62685cbe5daa8.tar.gz
timekeeping: Provide internal function __ktime_get_real_seconds
In order to fix Y2038 issues in the ntp code we will need replace get_seconds() with ktime_get_real_seconds() but as the ntp code uses the timekeeping lock which is also used by ktime_get_real_seconds(), we need a version without locking. Add a new function __ktime_get_real_seconds() in timekeeping to do this. Reviewed-by: John Stultz <john.stultz@linaro.org> Signed-off-by: DengChao <chao.deng@linaro.org> Signed-off-by: John Stultz <john.stultz@linaro.org>
-rw-r--r--kernel/time/timekeeping.c13
-rw-r--r--kernel/time/timekeeping_internal.h2
2 files changed, 15 insertions, 0 deletions
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index d9249da..21cc239 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -845,6 +845,19 @@ time64_t ktime_get_real_seconds(void)
}
EXPORT_SYMBOL_GPL(ktime_get_real_seconds);
+/**
+ * __ktime_get_real_seconds - The same as ktime_get_real_seconds
+ * but without the sequence counter protect. This internal function
+ * is called just when timekeeping lock is already held.
+ */
+time64_t __ktime_get_real_seconds(void)
+{
+ struct timekeeper *tk = &tk_core.timekeeper;
+
+ return tk->xtime_sec;
+}
+
+
#ifdef CONFIG_NTP_PPS
/**
diff --git a/kernel/time/timekeeping_internal.h b/kernel/time/timekeeping_internal.h
index 4ea005a..e20466f 100644
--- a/kernel/time/timekeeping_internal.h
+++ b/kernel/time/timekeeping_internal.h
@@ -26,4 +26,6 @@ static inline cycle_t clocksource_delta(cycle_t now, cycle_t last, cycle_t mask)
}
#endif
+extern time64_t __ktime_get_real_seconds(void);
+
#endif /* _TIMEKEEPING_INTERNAL_H */
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