s390/time,vdso: convert to the new update_vsyscall interface

Switch to the improved update_vsyscall interface that provides
sub-nanosecond precision for gettimeofday and clock_gettime.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 5 insertions, 4 deletions

diff --git a/arch/s390/kernel/vdso64/gettimeofday.S b/arch/s390/kernel/vdso64/gettimeofday.S
index 36ee674722ec..d0860d1d0ccc 100644
--- a/arch/s390/kernel/vdso64/gettimeofday.S
+++ b/arch/s390/kernel/vdso64/gettimeofday.S
@@ -31,12 +31,13 @@ __kernel_gettimeofday:
         stck    48(%r15)                        /* Store TOD clock */
         lg      %r1,48(%r15)
         sg      %r1,__VDSO_XTIME_STAMP(%r5)     /* TOD - cycle_last */
-        msgf    %r1,__VDSO_NTP_MULT(%r5)        /*  * NTP adjustment */
-        srlg    %r1,%r1,12                      /* cyc2ns(clock,cycle_delta) */
-        alg     %r1,__VDSO_XTIME_NSEC(%r5)      /*  + xtime.tv_nsec */
-        lg      %r0,__VDSO_XTIME_SEC(%r5)       /* xtime.tv_sec */
+        msgf    %r1,__VDSO_TK_MULT(%r5)         /*  * tk->mult */
+        alg     %r1,__VDSO_XTIME_NSEC(%r5)      /*  + tk->xtime_nsec */
+        lg      %r0,__VDSO_XTIME_SEC(%r5)       /* tk->xtime_sec */
         clg     %r4,__VDSO_UPD_COUNT(%r5)       /* check update counter */
         jne     0b
+        lgf     %r5,__VDSO_TK_SHIFT(%r5)        /* Timekeeper shift */
+        srlg    %r1,%r1,0(%r5)                  /*  >> tk->shift */
         larl    %r5,5f
 2:      clg     %r1,0(%r5)
         jl      3f