diff options
| author |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2013-11-22 10:04:53 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2013-11-25 09:15:39 +0100 |
| commit | 79c74ecbebf76732f91b82a62ce7fc8a88326962 (patch) | |
| tree | aabc8542bfa82067edb563a1de166952058e91d5 /arch/s390/kernel/vdso64/gettimeofday.S | |
| parent | s390/uaccess: add missing page table walk range check (diff) | |
| download | linux-dev-79c74ecbebf76732f91b82a62ce7fc8a88326962.tar.xz linux-dev-79c74ecbebf76732f91b82a62ce7fc8a88326962.zip | |
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>
Diffstat (limited to 'arch/s390/kernel/vdso64/gettimeofday.S')
| -rw-r--r-- | arch/s390/kernel/vdso64/gettimeofday.S | 9 |
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 |