linux-kernel - [PATCH] time: Make VIRT_CPU_ACCOUNTING_GEN depend on GENERIC

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Date:   Mon,  4 Mar 2019 21:01:31 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     "Paul E . McKenney" <paulmck@...ux.ibm.com>,
        Frederic Weisbecker <fweisbec@...il.com>,
        Arnd Bergmann <arnd@...db.de>, linux-kernel@...r.kernel.org
Subject: [PATCH] time: Make VIRT_CPU_ACCOUNTING_GEN depend on GENERIC_CLOCKEVENTS

Moving the CONTEXT_TRACKING Kconfig option into kernel/time/Kconfig
added an implicit dependency on the surrounding GENERIC_CLOCKEVENTS
option, but this is not always enabled when we are able to select
VIRT_CPU_ACCOUNTING_GEN:

WARNING: unmet direct dependencies detected for CONTEXT_TRACKING
  Depends on [n]: GENERIC_CLOCKEVENTS [=n]
  Selected by [y]:
  - VIRT_CPU_ACCOUNTING_GEN [=y] && <choice> && HAVE_CONTEXT_TRACKING [=y] && HAVE_VIRT_CPU_ACCOUNTING_GEN [=y]

Platforms without GENERIC_CLOCKEVENTS are rare enough that we can
probably just ignore that corner case and make it a dependency for
VIRT_CPU_ACCOUNTING_GEN to simplify the configuration.

Fixes: a4cffdad7314 ("time: Move CONTEXT_TRACKING to kernel/time/Kconfig")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 init/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/init/Kconfig b/init/Kconfig
index e0a6a35b8428..13442ca7d1ba 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -398,6 +398,7 @@ config VIRT_CPU_ACCOUNTING_GEN
 	bool "Full dynticks CPU time accounting"
 	depends on HAVE_CONTEXT_TRACKING
 	depends on HAVE_VIRT_CPU_ACCOUNTING_GEN
+	depends on GENERIC_CLOCKEVENTS
 	select VIRT_CPU_ACCOUNTING
 	select CONTEXT_TRACKING
 	help
-- 
2.20.0