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s390/time: remove select CLOCKSOURCE_VALIDATE_LAST_CYCLE again

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Sven Schnelle reported that setting CLOCKSOURCE_VALIDATE_LAST_CYCLE
doesn't make sense: even if our tod clock overflows delta calculation
(now - last) with unsigned 64 bit values will still be correct.

Therefore revert commit 555701a714 ("s390/time: select
CLOCKSOURCE_VALIDATE_LAST_CYCLE").

Fixes: 555701a714 ("s390/time: select CLOCKSOURCE_VALIDATE_LAST_CYCLE")
Reported-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
This commit is contained in:
Heiko Carstens 2020-08-05 14:50:41 +02:00
parent 0990d836ce
commit 12bbf0962a
1 changed files with 0 additions and 1 deletions
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arch/s390/Kconfig
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@ -126,7 +126,6 @@ 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