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authorjohn stultz <johnstul@us.ibm.com>2006-06-26 03:25:07 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-06-26 12:58:20 -0400
commit5eb6d20533d14a432df714520939a6181e28f099 (patch)
treeb032147620a8e213356658783f8037d2f5623b57 /ipc/msg.c
parent260a42309b31cbc54eb4b6b85649e412bcad053f (diff)
[PATCH] Time: Use clocksource abstraction for NTP adjustments
Instead of incrementing xtime by tick_nsec + ntp adjustments, use the clocksource abstraction to increment and scale time. Using the clocksource abstraction allows other clocksources to be used consistently in the face of late or lost ticks, while preserving the existing behavior via the jiffies clocksource. This removes the need to keep time_phase adjustments as we just use the current_tick_length() function as the NTP interface and accumulate time using shifted nanoseconds. The basics of this design was by Roman Zippel, however it is my own interpretation and implementation, so the credit should go to him and the blame to me. Signed-off-by: John Stultz <johnstul@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'ipc/msg.c')
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