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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2009-08-14 09:47:31 -0400
committerThomas Gleixner <tglx@linutronix.de>2009-08-15 04:55:46 -0400
commitd4f587c67fc39e0030ddd718675e252e208da4d7 (patch)
tree2222681c57966cc6b8404afdff3ab1a09ac7ea69 /arch/m68knommu
parent75c5158f70c065b9704b924503d96e8297838f79 (diff)
timekeeping: Increase granularity of read_persistent_clock()
The persistent clock of some architectures (e.g. s390) have a better granularity than seconds. To reduce the delta between the host clock and the guest clock in a virtualized system change the read_persistent_clock function to return a struct timespec. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Ingo Molnar <mingo@elte.hu> Acked-by: John Stultz <johnstul@us.ibm.com> Cc: Daniel Walker <dwalker@fifo99.com> LKML-Reference: <20090814134811.013873340@de.ibm.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/m68knommu')
-rw-r--r--arch/m68knommu/kernel/time.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/m68knommu/kernel/time.c b/arch/m68knommu/kernel/time.c
index d182b2f72211..68432248515c 100644
--- a/arch/m68knommu/kernel/time.c
+++ b/arch/m68knommu/kernel/time.c
@@ -72,9 +72,10 @@ static unsigned long read_rtc_mmss(void)
72 return mktime(year, mon, day, hour, min, sec);; 72 return mktime(year, mon, day, hour, min, sec);;
73} 73}
74 74
75unsigned long read_persistent_clock(void) 75void read_persistent_clock(struct timespec *ts)
76{ 76{
77 return read_rtc_mmss(); 77 ts->tv_sec = read_rtc_mmss();
78 ts->tv_nsec = 0;
78} 79}
79 80
80int update_persistent_clock(struct timespec now) 81int update_persistent_clock(struct timespec now)