Commit 555701a7 authored by Heiko Carstens's avatar Heiko Carstens
Browse files

s390/time: select CLOCKSOURCE_VALIDATE_LAST_CYCLE 



The value returned by read_tod_clock() will overflow on September 17th 2042.
To avoid that system time jumps back select CLOCKSOURCE_VALIDATE_LAST_CYCLE
which enables a sanity check in order to prevent negative "delta" values.

Signed-off-by: default avatarHeiko Carstens <hca@linux.ibm.com>
parent 58e15716

arch/s390/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -125,6 +125,7 @@ config S390 
	select HAVE_ARCH_JUMP_LABEL_RELATIVE

	select HAVE_ARCH_KASAN

	select HAVE_ARCH_KASAN_VMALLOC

	select CLOCKSOURCE_VALIDATE_LAST_CYCLE

	select CPU_NO_EFFICIENT_FFS if !HAVE_MARCH_Z9_109_FEATURES

	select HAVE_ARCH_SECCOMP_FILTER

	select HAVE_ARCH_SOFT_DIRTY

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