Commit 12bbf096 authored Aug 05, 2020 by Heiko Carstens

s390/time: remove select CLOCKSOURCE_VALIDATE_LAST_CYCLE again



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 555701a7 ("s390/time: select
CLOCKSOURCE_VALIDATE_LAST_CYCLE").

Fixes: 555701a7 ("s390/time: select CLOCKSOURCE_VALIDATE_LAST_CYCLE")
Reported-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

parent 0990d836

arch/s390/Kconfig

+0 −1

Original line number	Diff line number	Diff line
		@@ -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

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