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authorHeena Sirwani <heenasirwani@gmail.com>2014-10-29 16:01:50 +0530
committerThomas Gleixner <tglx@linutronix.de>2014-10-29 15:15:40 +0100
commitdbe7aa622db96b5cd601f59d09c4f00b98b76079 (patch)
tree303b3f8f88b40b4529f3a37ea20ca8f4f46694e5 /include/linux/timekeeping.h
parent9e3680b1750b9a62680b0262c9f438de98b77655 (diff)
downloadlinux-linaro-stable-dbe7aa622db96b5cd601f59d09c4f00b98b76079.tar.gz
timekeeping: Provide y2038 safe accessor to the seconds portion of CLOCK_REALTIME
ktime_get_real_seconds() is the replacement function for get_seconds() returning the seconds portion of CLOCK_REALTIME in a time64_t. For 64bit the function is equivivalent to get_seconds(), but for 32bit it protects the readout with the timekeeper sequence count. This is required because 32-bit machines cannot access 64-bit tk->xtime_sec variable atomically. [tglx: Massaged changelog and added docbook comment ] Signed-off-by: Heena Sirwani <heenasirwani@gmail.com> Reviewed-by: Arnd Bergman <arnd@arndb.de> Cc: John Stultz <john.stultz@linaro.org> Cc: opw-kernel@googlegroups.com Link: http://lkml.kernel.org/r/7adcfaa8962b8ad58785d9a2456c3f77d93c0ffb.1414578445.git.heenasirwani@gmail.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include/linux/timekeeping.h')
-rw-r--r--include/linux/timekeeping.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/timekeeping.h b/include/linux/timekeeping.h
index 115d55e11bc9..91454dea2bc6 100644
--- a/include/linux/timekeeping.h
+++ b/include/linux/timekeeping.h
@@ -29,6 +29,7 @@ struct timespec get_monotonic_coarse(void);
extern void getrawmonotonic(struct timespec *ts);
extern void ktime_get_ts64(struct timespec64 *ts);
extern time64_t ktime_get_seconds(void);
+extern time64_t ktime_get_real_seconds(void);
extern int __getnstimeofday64(struct timespec64 *tv);
extern void getnstimeofday64(struct timespec64 *tv);