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authorHeiko Carstens <hca@linux.ibm.com>2020-07-20 14:16:03 +0200
committerHeiko Carstens <hca@linux.ibm.com>2020-07-22 17:02:08 +0200
commit555701a714f77e01490f633c1080cf97f0ede1f0 (patch)
tree189bf362aaf4b19b870ba5fb8f7b27ed1200fdfc /arch/s390
parent58e15716feb562cdba57e99d62c525a1faa37c08 (diff)
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: Heiko Carstens <hca@linux.ibm.com>
Diffstat (limited to 'arch/s390')
-rw-r--r--arch/s390/Kconfig1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 0df33cffec52..d95d323cf213 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -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