- Make the update to the coarse timekeeper unconditional. This is required
because the coarse timekeeper interfaces in the VDSO do not depend on a
VDSO capable clocksource. If the system does not have a VDSO capable
clocksource and the update is depending on the VDSO capable clocksource,
the coarse VDSO interfaces would operate on stale data forever.
- Invert the logic of __arch_update_vdso_data() to avoid further head
scratching. Tripped over this several times while analyzing the update
problem above.
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Merge tag 'timers-urgent-2020-01-27' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer fixes from Thomas Gleixner:
"Two fixes for the generic VDSO code which missed 5.5:
- Make the update to the coarse timekeeper unconditional.
This is required because the coarse timekeeper interfaces in the
VDSO do not depend on a VDSO capable clocksource. If the system
does not have a VDSO capable clocksource and the update is
depending on the VDSO capable clocksource, the coarse VDSO
interfaces would operate on stale data forever.
- Invert the logic of __arch_update_vdso_data() to avoid further head
scratching.
Tripped over this several times while analyzing the update problem
above"
* tag 'timers-urgent-2020-01-27' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
lib/vdso: Update coarse timekeeper unconditionally
lib/vdso: Make __arch_update_vdso_data() logic understandable
a56c41e5d7