On Sat, 2010-12-18 at 05:16 +0900, Kuwahara,T. wrote: > On 12/17/10, Richard Cochran <richardcochran@xxxxxxxxx> wrote: > > This patch adds a new mode bit into the timex structure. When set, the bit > > instructs the kernel to add the given time value to the current time. > > > > The proposed new control mode, ADJ_SETOFFSET, is logically the same as > ADJ_OFFSET with timex.constant == -INFINITY. I'm not sure if this is correct. Its more like settimeofday, only giving a relative offset to jump the clock, rather then an absolute time. It does not slew the clock over time like ADJ_OFFSET does. > So it is possible to do > the same thing without risking forward compatibility. (I mean by "risking > forward compatibility" that the mode bit 0x0040 may be defined differently > by the upstream maintainer anytime in the future.) adjtimex is a linux specific interface, which is compatible but not identical to the ntp specified interfaces. The ntp client code already has Linux specific modifications, so I don't think we have to worry about 0x40 specifically being reserved by the NTP client. thanks -john -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html