Re: [PATCH] time: Revert ALWAYS_USE_PERSISTENT_CLOCK compile time optimizaitons
From: Kay Sievers
Date: Thu Apr 25 2013 - 19:23:23 EST
On Wed, Apr 24, 2013 at 8:55 PM, John Stultz <john.stultz@xxxxxxxxxx> wrote:
>> FWIW, in the light of the original change, I've just removed the
>> /dev/rtc creation from the default udev rules now, so that thing will
>> be phased out in the future.
> Is that actually wanted? What happens to applications that use /dev/rtc?
> I think setting up the /dev/rtc link is important. Its just that setting it
> up exclusively by the hctosys flag is maybe more fragile then we'd like.
> Instead the hctosys flag maybe should only be used as a hint if there is
> more then one RTC available.
I've changed the udev rules now to first "search" for the rtc with
"hctosys" flag set, and if none is found, just fall back to /dev/rtc0.
It should work reliably on most boxes, and still do the right thing in
most cases if none of the rtcs has that flag.
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