s390/time,vdso: fix clock_gettime for CLOCK_MONOTONIC

With git commit 79c74ecbebf76732f91b82a62ce7fc8a88326962
"s390/time,vdso: convert to the new update_vsyscall interface"
the new update_vsyscall function already does the sum of xtime
and wall_to_monotonic. The old update_vsyscall function only
copied the wall_to_monotonic offset. The vdso code needs to be
modified to take this into consideration.

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

2 files changed, 4 insertions, 11 deletions

diff --git a/arch/s390/kernel/vdso32/clock_gettime.S b/arch/s390/kernel/vdso32/clock_gettime.S
index 5be8e472f57d..65fc3979c2f1 100644
--- a/arch/s390/kernel/vdso32/clock_gettime.S
+++ b/arch/s390/kernel/vdso32/clock_gettime.S
@@ -46,18 +46,13 @@ __kernel_clock_gettime:
         jnm     3f
         a       %r0,__VDSO_TK_MULT(%r5)
 3:      alr     %r0,%r2
-        al      %r0,__VDSO_XTIME_NSEC(%r5)      /*  + tk->xtime_nsec */
-        al      %r1,__VDSO_XTIME_NSEC+4(%r5)
-        brc     12,4f
-        ahi     %r0,1
-4:      al      %r0,__VDSO_WTOM_NSEC(%r5)       /*  + wall_to_monotonic.nsec */
+        al      %r0,__VDSO_WTOM_NSEC(%r5)
         al      %r1,__VDSO_WTOM_NSEC+4(%r5)
         brc     12,5f
         ahi     %r0,1
 5:      l       %r2,__VDSO_TK_SHIFT(%r5)        /* Timekeeper shift */
         srdl    %r0,0(%r2)                      /*  >> tk->shift */
-        l       %r2,__VDSO_XTIME_SEC+4(%r5)
-        al      %r2,__VDSO_WTOM_SEC+4(%r5)
+        l       %r2,__VDSO_WTOM_SEC+4(%r5)
         cl      %r4,__VDSO_UPD_COUNT+4(%r5)     /* check update counter */
         jne     1b
         basr    %r5,0
diff --git a/arch/s390/kernel/vdso64/clock_gettime.S b/arch/s390/kernel/vdso64/clock_gettime.S
index 4007007a9652..91940ed33a4a 100644
--- a/arch/s390/kernel/vdso64/clock_gettime.S
+++ b/arch/s390/kernel/vdso64/clock_gettime.S
@@ -37,13 +37,11 @@ __kernel_clock_gettime:
         jnz     0b
         stck    48(%r15)                        /* Store TOD clock */
         lgf     %r2,__VDSO_TK_SHIFT(%r5)        /* Timekeeper shift */
-        lg      %r0,__VDSO_XTIME_SEC(%r5)       /* tk->xtime_sec */
-        alg     %r0,__VDSO_WTOM_SEC(%r5)        /*  + wall_to_monotonic.sec */
+        lg      %r0,__VDSO_WTOM_SEC(%r5)
         lg      %r1,48(%r15)
         sg      %r1,__VDSO_XTIME_STAMP(%r5)     /* TOD - cycle_last */
         msgf    %r1,__VDSO_TK_MULT(%r5)         /*  * tk->mult */
-        alg     %r1,__VDSO_XTIME_NSEC(%r5)      /*  + tk->xtime_nsec */
-        alg     %r1,__VDSO_WTOM_NSEC(%r5)       /*  + wall_to_monotonic.nsec */
+        alg     %r1,__VDSO_WTOM_NSEC(%r5)
         srlg    %r1,%r1,0(%r2)                  /*  >> tk->shift */
         clg     %r4,__VDSO_UPD_COUNT(%r5)       /* check update counter */
         jne     0b