linux-kernel - [PATCH][RESEND] pps: kc: fix non-tickless system config dependency

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Date:   Wed, 21 Sep 2016 18:38:01 +0200
From:   "Maciej S. Szmigiero" <mail@...iej.szmigiero.name>
To:     Rodolfo Giometti <giometti@...eenne.com>
CC:     linux-kernel <linux-kernel@...r.kernel.org>,
        Alexander Gordeev <lasaine@....cs.msu.su>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: [PATCH][RESEND] pps: kc: fix non-tickless system config dependency

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.

Signed-off-by: Maciej S. Szmigiero <mail@...iej.szmigiero.name>
---
This is a resend without functional changes since previous
submission and resubmission weren't picked up.

@Rodolfo: Could you ack this, please?

 drivers/pps/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pps/Kconfig b/drivers/pps/Kconfig
index 7512e98e9311..564a51abeece 100644
--- a/drivers/pps/Kconfig
+++ b/drivers/pps/Kconfig
@@ -31,7 +31,7 @@ config PPS_DEBUG
 
 config NTP_PPS
 	bool "PPS kernel consumer support"
-	depends on !NO_HZ
+	depends on !NO_HZ_COMMON
 	help
 	  This option adds support for direct in-kernel time
 	  synchronization using an external PPS signal.