Re: New kernel interface for sys_tz and timewarp?

[Thomas Gleixner]

On Mon, 19 Aug 2019, Karel Zak wrote:
> On Wed, Aug 14, 2019 at 11:32:08AM +0200, Alexandre Belloni wrote:
> > On 14/08/2019 11:09:36+0200, Lennart Poettering wrote:
> > > On Mi, 14.08.19 10:31, Arnd Bergmann (arnd@xxxxxxxx) wrote:
> > > 
> > > > - glibc stops passing the caller timezone argument to the kernel
> > > > - the distro kernel disables CONFIG_RTC_HCTOSYS,
> > > >   CONFIG_RTC_SYSTOHC  and CONFIG_GENERIC_CMOS_UPDATE
> > > 
> > > What's the benefit of letting userspace do this? It sounds a lot more
> > > fragile to leave this syncing to userspace if the kernel can do this
> > > trivially on its own.
> 
> Good point, why CONFIG_RTC_SYSTOHC has been added to the kernel? 

023f333a99ce ("NTP: Add a CONFIG_RTC_SYSTOHC configuration")