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Date: Thu, 18 Feb 2016 11:10:07 -0500 (EST) From: David Miller <davem@...emloft.net> To: amsfield22@...il.com Cc: mac@...ware.de, isdn@...ux-pingi.de, netdev@...r.kernel.org, linux-kernel@...r.kernel.org, y2038@...ts.linaro.org Subject: Re: [RESEND PATCH v3] isdn: divamnt: use y2038-safe ktime_get_ts64() for trace data timestamps From: Alison Schofield <amsfield22@...il.com> Date: Wed, 17 Feb 2016 22:35:11 -0800 > divamnt stores a start_time at module init and uses it to calculate > elapsed time. The elapsed time, stored in secs and usecs, is part of > the trace data the driver maintains for the DIVA Server ISDN cards. > No change to the format of that time data is required. > > To avoid overflow on 32-bit systems use ktime_get_ts64() to return > the elapsed monotonic time since system boot. > > This is a change from real to monotonic time. Since the driver only > stores elapsed time, monotonic time is sufficient and more robust > against real time clock changes. These new monotonic values can be > more useful for debugging because they can be easily compared to > other monotonic timestamps. > > Note elaspsed time values will now start at system boot time rather > than module load time, so they will differ slightly from previously > reported values. > > Remove declaration and init of previously unused time constants: > start_sec, start_usec. > > Signed-off-by: Alison Schofield <amsfield22@...il.com> > Reviewed-by: Arnd Bergmann <arnd@...db.de> Applied to net-next, thanks.
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