linux-kernel - [PATCH 3/5] cputime: allow irq time accounting to be selected as an option

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Message-Id: <1465353004-15044-4-git-send-email-riel@redhat.com>
Date:	Tue,  7 Jun 2016 22:30:02 -0400
From:	riel@...hat.com
To:	linux-kernel@...r.kernel.org
Cc:	kernellwp@...il.com, mingo@...nel.org, peterz@...radead.org,
	tglx@...utronix.de, fweisbec@...hat.com
Subject: [PATCH 3/5] cputime: allow irq time accounting to be selected as an option

From: Rik van Riel <riel@...hat.com>

Allow CONFIG_IRQ_TIME_ACCOUNTING to be selected as an option, on top
of CONFIG_VIRT_CPU_ACCOUNTING_GEN (and potentially others?).

This allows for the irq time accounting code to be used with nohz_idle
CPUs, which is how several distributions ship their kernels. Using the
same code for several timer modes also allows us to drop duplicate code.

Signed-off-by: Rik van Riel <riel@...hat.com>
---
 init/Kconfig | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/init/Kconfig b/init/Kconfig
index 0dfd09d54c65..4c7ee4f136cf 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -375,9 +375,11 @@ config VIRT_CPU_ACCOUNTING_GEN
 
 	  If unsure, say N.
 
+endchoice
+
 config IRQ_TIME_ACCOUNTING
 	bool "Fine granularity task level IRQ time accounting"
-	depends on HAVE_IRQ_TIME_ACCOUNTING && !NO_HZ_FULL
+	depends on HAVE_IRQ_TIME_ACCOUNTING && !VIRT_CPU_ACCOUNTING_NATIVE
 	help
 	  Select this option to enable fine granularity task irq time
 	  accounting. This is done by reading a timestamp on each
@@ -386,8 +388,6 @@ config IRQ_TIME_ACCOUNTING
 
 	  If in doubt, say N here.
 
-endchoice
-
 config BSD_PROCESS_ACCT
 	bool "BSD Process Accounting"
 	depends on MULTIUSER
-- 
2.5.5