ntp: support for TAI

This adds support for setting the TAI value (International Atomic Time).  The
value is reported back to userspace via timex (as we don't have a
ntp_gettime() syscall).

Signed-off-by: Roman Zippel <zippel@linux-m68k.org>
Cc: john stultz <johnstul@us.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 6 insertions, 2 deletions

diff --git a/include/linux/compat.h b/include/linux/compat.h
index 8fa7857e153b..cf8d11cad5ae 100644
--- a/include/linux/compat.h
+++ b/include/linux/compat.h
@@ -65,10 +65,11 @@ struct compat_timex {
         compat_long_t calcnt;
         compat_long_t errcnt;
         compat_long_t stbcnt;
+        compat_int_t tai;
 
         compat_int_t :32; compat_int_t :32; compat_int_t :32; compat_int_t :32;
         compat_int_t :32; compat_int_t :32; compat_int_t :32; compat_int_t :32;
-        compat_int_t :32; compat_int_t :32; compat_int_t :32; compat_int_t :32;
+        compat_int_t :32; compat_int_t :32; compat_int_t :32;
 };
 
 #define _COMPAT_NSIG_WORDS      (_COMPAT_NSIG / _COMPAT_NSIG_BPW)
diff --git a/include/linux/timex.h b/include/linux/timex.h
index 9fbdd12a52f1..6ff92237759a 100644
--- a/include/linux/timex.h
+++ b/include/linux/timex.h
@@ -121,9 +121,11 @@ struct timex {
         long errcnt;            /* calibration errors (ro) */
         long stbcnt;            /* stability limit exceeded (ro) */
 
+        int tai;                /* TAI offset (ro) */
+
         int  :32; int  :32; int  :32; int  :32;
         int  :32; int  :32; int  :32; int  :32;
-        int  :32; int  :32; int  :32; int  :32;
+        int  :32; int  :32; int  :32;
 };
 
 /*
@@ -135,6 +137,7 @@ struct timex {
 #define ADJ_ESTERROR            0x0008  /* estimated time error */
 #define ADJ_STATUS              0x0010  /* clock status */
 #define ADJ_TIMECONST           0x0020  /* pll time constant */
+#define ADJ_TAI                 0x0080  /* set TAI offset */
 #define ADJ_MICRO               0x1000  /* select microsecond resolution */
 #define ADJ_NANO                0x2000  /* select nanosecond resolution */
 #define ADJ_TICK                0x4000  /* tick value */