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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2009-08-14 15:47:31 +0200
committerThomas Gleixner <tglx@linutronix.de>2009-08-15 10:55:46 +0200
commitd4f587c67fc39e0030ddd718675e252e208da4d7 (patch)
tree2222681c57966cc6b8404afdff3ab1a09ac7ea69 /arch/mips/dec
parenttimekeeping: Update clocksource with stop_machine (diff)
downloadlinux-d4f587c67fc39e0030ddd718675e252e208da4d7.tar.xz
linux-d4f587c67fc39e0030ddd718675e252e208da4d7.zip
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/mips/dec')
-rw-r--r--arch/mips/dec/time.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/mips/dec/time.c b/arch/mips/dec/time.c
index 463136e6685a..02f505f23c32 100644
--- a/arch/mips/dec/time.c
+++ b/arch/mips/dec/time.c
@@ -18,7 +18,7 @@
#include <asm/dec/ioasic.h>
#include <asm/dec/machtype.h>
-unsigned long read_persistent_clock(void)
+void read_persistent_clock(struct timespec *ts)
{
unsigned int year, mon, day, hour, min, sec, real_year;
unsigned long flags;
@@ -53,7 +53,8 @@ unsigned long read_persistent_clock(void)
year += real_year - 72 + 2000;
- return mktime(year, mon, day, hour, min, sec);
+ ts->tv_sec = mktime(year, mon, day, hour, min, sec);
+ ts->tv_nsec = 0;
}
/*