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

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
...@@ -125,6 +125,7 @@ config S390 ...@@ -125,6 +125,7 @@ config S390
select HAVE_ARCH_JUMP_LABEL_RELATIVE select HAVE_ARCH_JUMP_LABEL_RELATIVE
select HAVE_ARCH_KASAN select HAVE_ARCH_KASAN
select HAVE_ARCH_KASAN_VMALLOC select HAVE_ARCH_KASAN_VMALLOC
select CLOCKSOURCE_VALIDATE_LAST_CYCLE
select CPU_NO_EFFICIENT_FFS if !HAVE_MARCH_Z9_109_FEATURES select CPU_NO_EFFICIENT_FFS if !HAVE_MARCH_Z9_109_FEATURES
select HAVE_ARCH_SECCOMP_FILTER select HAVE_ARCH_SECCOMP_FILTER
select HAVE_ARCH_SOFT_DIRTY select HAVE_ARCH_SOFT_DIRTY
......
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