pps: kc: fix non-tickless system config dependency

Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git

kernel os linux

CONFIG_NO_HZ currently only sets the default value of dynticks config so
if PPS kernel consumer needs periodic timer ticks it should depend on
!CONFIG_NO_HZ_COMMON instead of !CONFIG_NO_HZ.

Otherwise it is possible to enable it even on tickless system which has
CONFIG_NO_HZ not set and CONFIG_NO_HZ_IDLE (or CONFIG_NO_HZ_FULL) set.

Link: http://lkml.kernel.org/r/57E2B769.50202@maciej.szmigiero.name
Signed-off-by: Maciej S. Szmigiero <mail@maciej.szmigiero.name>
Acked-by: Rodolfo Giometti <giometti@enneenne.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

authored by

Maciej S. Szmigiero and committed by

Linus Torvalds 9 years ago ab47deb6 54c721b8

+1 -1

1 changed file

expand all

drivers

pps

Kconfig

+1 -1

drivers/pps/Kconfig

··· 31 31 32 32 config NTP_PPS 33 33 bool "PPS kernel consumer support" 34 - depends on !NO_HZ 34 + depends on !NO_HZ_COMMON 35 35 help 36 36 This option adds support for direct in-kernel time 37 37 synchronization using an external PPS signal.